lesshat
v4.1.0
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The most advanced LESS mixins library
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lesshat
Download latest | Get Started | Introduction | Contribute | Documentation |
Current version: v4.1.0 (2016-07-19)
Get started
To use lesshat, you need node/npm installed then run npm install lesshat --save
to install and save lesshat into your package.json. From here, you just need to reference the node_modules/lesshat/lesshat.less
file within any of your project less files. You can also use the prefixed version available at node_module/lesshat/lesshat-prefixed.less
if you're worried about mixin name conflicts with other library.
Bower
As of version 4, lesshat has removed support for Bower by removing the build folder from the repository. There are many reasons that Bower is considered inadequate for dependency management and since people already use npm for dependency management simply to install Bower, another dependency manager, it felt a bit redundant.
Even if Bower isn't supported, it can still be used with the tarball uploaded to npm. You can add the dependency to your bower.json file like this:
"dependencies": {
"lesshat": "https://registry.npmjs.org/lesshat/-/lesshat-4.0.1.tgz"
}
You can also use the command line to install it by running bower install lesshat=https://registry.npmjs.org/lesshat/-/lesshat-4.0.1.tgz --save
.
After that, you can reference the less file directly the same way as the npm version with a slight path difference. The only downside is that bower will not update automatically because it doesn't support semantic versioning with files.
You should really consider using npm instead of bower.
Introduction
Why lesshat? In August 2012, while we were developing and extending CSS Hat for LESS we needed universal mixins. Unfortunately, none of available were good enough that would satisfy our needs and that’s why we created new custom ones on our own, which have become the most popular mixin library for the whole LESS CSS.
Meet the best mixins library in the world.
Features
- No restrictions – If it's possible in CSS, it must be possible to be done with a mixin. Unlimited number of anything, shadows, gradients, gradient swatches.
- Standard naming convention – In lesshat, mixins have names like all CSS3 properties. No
.rounded
or.shadow
. It's stupid. - Cross-browser – lesshat takes care of exporting CSS for all available browsers.
- Bootstrap friendly – You can now use prefixed lesshat version and gaily work with Bootstrap. Yeah it's that easy.
- Keyframes – Although it's tricky as hell, but yeah lesshat has mixin for
.keyframes
- Blank state ready – If you call mixin without any arguments, lesshat does not pollute your CSS with empty properties. Instead lesshat generates nothing.
- Workflow – No more one line editing! We created developer friendly worklow for editing and creating mixins. You can test mixins with MOCHA, generate new mixin with GRUNT. Find out more about the workflow in contribution section.
Structure of lesshat mixins
Typical lesshat mixin:
.supermixin(...) { @process: ~`(function(){})()`; -webkit-border-radius: @process; border-radius: @process; }
In @process variable is all magic. Please don't edit javascript directly in .less file. Instead use lesshat-devstack.
Use (almost) every property without interpolation!
Correct mixin calling:
.background-image(linear-gradient(to bottom, #fb83fa 0%,#e93cec 100%))
Incorrect calling:
.background-image(~'linear-gradient(to bottom, #fb83fa 0%,#e93cec 100%)')
Unfortunately, there are exceptions:
.keyframes(~''); .calc(~''); .selection(~''); // in some cases you have to interpolate border-radius or LESS CSS begins to play on calculator .border-radius(~'20px / 40px');
Contribute:
- Fork this repo
- run
npm install
- If you create new mixin, please add tests and documentation on how to use it
- Always test your changes and make sure that the documentation is being added to the README.md by running
grunt
- Finally, commit your changes and create a pull request
Documentation:
List of mixins:
- align-content
flexbox
- align-items
flexbox
- align-self
flexbox
- animation
- animation-delay
- animation-direction
- animation-duration
- animation-fill-mode
- animation-iteration-count
- animation-name
- animation-play-state
- animation-timing-function
- appearance
- backface-visibility
- background-clip
- background-image
- background-origin
- background-size
- blur
filter
- border-bottom-left-radius
- border-bottom-right-radius
- border-image
- border-radius
- border-top-left-radius
- border-top-right-radius
- box-shadow
- box-sizing
- brightness
filter
- calc
- column-count
- column-gap
- column-rule
- column-width
- columns
- contrast
filter
- display
flexbox
- drop-shadow
filter
- filter
- flex
flexbox
- flex-basis
flexbox
- flex-direction
flexbox
- flex-grow
flexbox
- flex-shrink
flexbox
- flex-wrap
flexbox
- font-face
- grayscale
filter
- hue-rotate
filter
- hyphens
- invert
filter
- justify-content
flexbox
- keyframes
- opacity
- order
- perspective
- perspective-origin
- placeholder
- rotate
transform
- rotate3d
transform
- rotateX
transform
- rotateY
transform
- rotateZ
transform
- saturate
filter
- scale
transform
- scale3d
transform
- scaleX
transform
- scaleY
transform
- scaleZ
transform
- selection
- sepia
filter
- size
width, height
- skew
transform
- skewX
transform
- skewY
transform
- transform
- transform-origin
- transform-style
- transition
- transition-delay
- transition-duration
- transition-property
- transition-timing-function
- translate
transform
- translate3d
transform
- translateX
transform
- translateY
transform
- translateZ
transform
- user-select
• align-content
Summary:
The CSS align-content property aligns a flex container's lines within the flex container when there is an extra space on the cross-axis. This property has no effect on the single line flexible boxes.
Resources: MDN, CSS-Tricks
Syntax:
Default value: stretch
.align-content(flex-start | flex-end | center | space-between | space-around | stretch)
Example:
div {
.align-content(flex-start);
}
// Result
div {
-webkit-align-content: flex-start;
-ms-flex-line-pack: start;
align-content: flex-start;
}
• align-items
Summary:
The CSS align-items property aligns flex items of the current flex line the same way as justify-content but in the perpendicular direction.
Resources: MDN, CSS-Tricks
Syntax:
Default value: stretch
.align-items(flex-start | flex-end | center | baseline | stretch)
Example:
div {
.align-items(flex-start);
}
// Result
div {
-webkit-box-align: flex-start;
-moz-box-align: start;
-webkit-align-items: start;
-ms-flex-align: flex-start;
align-items: flex-start;
}
• align-self
Summary:
The align-self CSS property aligns flex items of the current flex line overriding the align-items value. If any of the flex item's cross-axis margin is set to auto, then align-self is ignored.
Resources: MDN, CSS-Tricks
Syntax:
Default value: auto
.align-self(auto | flex-start | flex-end | center | baseline | stretch)
Example:
div {
.align-self(flex-start);
}
// Result
div {
-webkit-align-self: flex-start;
-ms-flex-item-align: start;
align-self: flex-start;
}
• animation
Summary:
Shorthand to define a CSS animation, setting all parameters at once.
Resources: WebPlatform, CSS3files
Syntax:
Default value: none
.animation(animation-name | animation-duration | animation-timing-function | animation-delay | animation-iteration-count | animation-direction | animation-fill-mode , […]*)
Example:
div {
.animation(nameAnimation 2s linear alternate);
}
// Result
div {
-webkit-animation: nameAnimation 2s linear alternate;
-moz-animation: nameAnimation 2s linear alternate;
-o-animation: nameAnimation 2s linear alternate;
animation: nameAnimation 2s linear alternate;
}
• animation-delay
Summary:
Defines a length of time to elapse before an animation starts, allowing an animation to begin execution some time after it is applied.
Resources: WebPlatform, MDN
Syntax:
Default value: 0
.animation-delay(<time>, …)
Tips and tricks:
If you omit units after time argument, animation-delay
is trying to be smart and add properly value.
if (time > 10) {
time += 'ms';
} else {
time += 's';
}
Example:
div {
.animation-delay(2, 200);
}
// Result
div {
-webkit-animation-delay: 2s, 200ms;
-moz-animation-delay: 2s, 200ms;
-o-animation-delay: 2s, 200ms;
animation-delay: 2s, 200ms;
}
• animation-direction
Summary:
The animation-direction CSS property indicates whether the animation should play in reverse on alternate cycles.
Resources: WebPlatform, MDN
Syntax:
Default value: normal
.animation-direction(<single-animation-direction>, …)
Example:
div {
.animation-direction(reverse, alternate);
}
// Result
div {
-webkit-animation-direction: reverse, alternate;
-moz-animation-direction: reverse, alternate;
-o-animation-direction: reverse, alternate;
animation-direction: reverse, alternate;
}
• animation-duration
Summary:
The animation-duration CSS property specifies the length of time that an animation should take to complete one cycle.
Resources: WebPlatform, MDN
Syntax:
Default value: 0
.animation-duration(<time>, …)
Tips and tricks:
If you omit units after time argument, animation-duration
is trying to be smart and add proper value.
if (time > 10) {
time += 'ms';
} else {
time += 's';
}
Example:
div {
.animation-duration(2000);
}
// Result
div {
-webkit-animation-duration: 2000ms;
-moz-animation-duration: 2000ms;
-o-animation-duration: 2000ms;
animation-duration: 2000ms;
}
• animation-fill-mode
Summary:
The animation-fill-mode CSS property specifies how a CSS animation should apply styles to its target before and after it is executing.
Resources: WebPlatform, MDN
Syntax:
Default value: none
.animation-fill-mode(<single-animation-fill-mode>, …)
Example:
div {
.animation-fill-mode(forwards);
}
// Result
div {
-webkit-animation-fill-mode: forwards;
-moz-animation-fill-mode: forwards;
-o-animation-fill-mode: forwards;
animation-fill-mode: forwards;
}
• animation-iteration-count
Summary:
The animation-iteration-count CSS property specifies how a CSS animation should apply styles to its target before and after it is executing.
Resources: WebPlatform, MDN
Syntax:
Default value: 1
.animation-iteration-count(<single-animation-iteration-count>, …)
Example:
div {
.animation-iteration-count(3);
}
// Result
div {
-webkit-animation-iteration-count: 3;
-moz-animation-iteration-count: 3;
-o-animation-iteration-count: 3;
animation-iteration-count: 3;
}
• animation-name
Summary:
The animation-name CSS property specifies a list of animations that should be applied to the selected element. Each name indicates a @keyframes at-rule that defines the property values for the animation sequence.
Resources: WebPlatform, MDN
Syntax:
Default value: none
.animation-name(<single-animation-name>, …)
Example:
div {
.animation-name(animation-1, animation-2);
}
// Result
div {
-webkit-animation-name: animation-1, animation-2;
-moz-animation-name: animation-1, animation-2;
-o-animation-name: animation-1, animation-2;
animation-name: animation-1, animation-2;
}
• animation-play-state
Summary:
The animation-play-state CSS property determines whether an animation is running or paused. You can query this property's value to determine whether or not the animation is currently running; in addition, you can set its value to pause and resume playback of an animation.
Resources: WebPlatform, MDN
Syntax:
Default value: running
.animation-play-state(<single-animation-play-state>, …)
Example:
div {
.animation-play-state(paused);
}
// Result
div {
-webkit-animation-play-state: paused;
-moz-animation-play-state: paused;
-o-animation-play-state: paused;
animation-play-state: paused;
}
• animation-timing-function
Summary:
The animation-timing-function CSS property determines whether an animation is running or paused. You can query this property's value to determine whether or not the animation is currently running; in addition, you can set its value to pause and resume playback of an animation.
Resources: WebPlatform, MDN
Syntax:
Default value: ease
.animation-timing-function(<single-animation-timing-function>, …)
Example:
div {
.animation-timing-function(cubic-bezier(0.1, 0.7, 1.0, 0.1));
}
// Result
div {
-webkit-animation-timing-function: cubic-bezier(0.1, 0.7, 1.0, 0.1);
-moz-animation-timing-function: cubic-bezier(0.1, 0.7, 1.0, 0.1);
-o-animation-timing-function: cubic-bezier(0.1, 0.7, 1.0, 0.1);
animation-timing-function: cubic-bezier(0.1, 0.7, 1.0, 0.1);
}
• appearance
Summary:
Allows changing the style of any element to platform-based interface elements or vice versa.
Resources: WebPlatform, CSS-Tricks
Syntax:
Default value: none
.appearance(<appearance>)
Example:
div {
.appearance();
}
// Result
div {
-webkit-appearance: none;
-moz-appearance: none;
appearance: none;
}
• backface-visibility
Summary:
The CSS backface-visibility property determines whether or not the back face of the element is visible when facing the user. The back face of an element always is a transparent background, letting, when visible, a mirror image of the front face be displayed.
Resources: WebPlatform, MDN
Syntax:
Default value: none
.backface-visibility(visible | hidden )
Example:
div {
.backface-visibility(hidden);
}
// Result
div {
-webkit-backface-visibility: none;
-moz-backface-visibility: none;
-ms-backface-visibility: none;
-o-backface-visibility: none;
backface-visibility: none;
}
• background-clip
Summary:
The background-clip CSS property specifies whether an element's background, either the color or image, extends underneath its border.
Resources: WebPlatform, MDN
Syntax:
Default value: border-box
.background-clip(<box>)
Example:
div {
.background-clip(padding-box);
}
// Result
div {
-webkit-background-clip: padding-box;
-moz-background-clip: padding-box;
background-clip: padding-box;
}
• background-image
Summary:
With the background-image you can create prefixed linear or radial gradients. The CSS (linear|radial)-gradient() function creates an <image>
which represents a linear|radial gradient of colors. The result of this function is an object of the CSS <gradient>
data type. Like any other gradient, a CSS linear gradient is not a CSS <color>
but an image with no intrinsic dimensions; that is, it has neither natural or preferred size, nor ratio. Its concrete size will match the one of the element it applies to.
Resources: WebPlatform, MDN
Syntax:
Default value: none
.background-image(<gradient>, ...)
Tips and tricks:
The background-image
mixin is the most robust mixin of all.
It generates SVG
for Internet Explorer 9, old webkit, moz and opera syntax.
Always use W3C syntax for the mixin. It can recalculate angle for older syntax, transform to top
to bottom
syntax and it can omit SVG syntax if it's impossible to express SVG e.g. when you call mixin with 55deg.
If you call mixin without arguments, LESS Hat does not generate anything.
Great online gradient generator.
Example:
div {
.background-image(linear-gradient(to bottom, #fb83fa 0%,#e93cec 100%));
}
// Result
div {
background-image: url(data:image/svg+xml;base64,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);
background-image: -webkit-linear-gradient(top, #fb83fa 0%, #e93cec 100%);
background-image: -moz-linear-gradient(top, #fb83fa 0%, #e93cec 100%);
background-image: -o-linear-gradient(top, #fb83fa 0%, #e93cec 100%);
background-image: linear-gradient(to bottom, #fb83fa 0%, #e93cec 100%);
}
• background-origin
Summary:
The background-origin CSS property determines the background positioning area, that is the position of the origin of an image specified using the background-image CSS property.
Resources: WebPlatform, MDN
Syntax:
Default value: padding-box
.background-origin(<box>)
Example:
div {
.background-origin(content-box);
}
// Result
div {
-webkit-background-origin: content-box;
-moz-background-origin: content-box;
background-origin: content-box;
}
• background-size
Summary:
The background-size CSS property specifies the size of the background images. The size of the image can be fully constrained or only partially in order to preserve its intrinsic ratio.
Resources: WebPlatform, MDN
Syntax:
Default value: auto auto
.background-size(<bg-size>, ...)
Tips and tricks:
If you omit units, background-size
adds px
automatically.
Example:
div {
.background-size(cover, 100%);
}
// Result
div {
-webkit-background-size: cover, 100%;
-moz-background-size: cover, 100%;
background-size: cover, 100%;
}
• blur (shorthand for filter property)
Summary:
Applies a Gaussian blur to the input image. The value of ‘radius’ defines the value of the standard deviation to the Gaussian function, or how many pixels on the screen blend into each other, so a larger value will create more blur. If no parameter is provided, then a value 0 is used. The parameter is specified as a CSS length, but does not accept percentage values.
Resources: MDN
Syntax:
Default value: 0
.blur(length)
Tips and tricks:
If you omit units, blur
adds px
automatically.
Example:
div {
.blur(5px);
}
// Result
div {
-webkit-filter: blur(5px);
-moz-filter: blur(5px);
-ms-filter: blur(5px);
filter: blur(5px);
}
• border-bottom-left-radius
Summary:
The border-bottom-left-radius CSS property sets the rounding of the bottom-left corner of the element. The rounding can be a circle or an ellipse, or if one of the value is 0 no rounding is done and the corner is square.
Resources: WebPlatform, MDN
Syntax:
Default value: 0
.border-bottom-left-radius(length | percentage)
Tips and tricks:
If you omit units, border-bottom-left-radius
adds px
automatically.
If you want to use syntax like 10px \ 5px
, you have to interpolate argument ~''
or LESS CSS divides it (yeah awesome feature!).
Also LESS Hat adds background-clip: padding-box
, because it fixes problem with older Safari. Here is some resource.
Example:
div {
.border-bottom-left-radius(10px);
}
// Result
div {
-webkit-border-bottom-left-radius: 10px;
-moz-border-radius-bottomleft: 10px;
border-bottom-left-radius: 10px;
}
• border-bottom-right-radius
Summary:
The border-bottom-right-radius CSS property sets the rounding of the bottom-left corner of the element. The rounding can be a circle or an ellipse, or if one of the value is 0 no rounding is done and the corner is square.
Resources: WebPlatform, MDN
Syntax:
Default value: 0
.border-bottom-right-radius(length | percentage)
Tips and tricks:
If you omit units, border-bottom-right-radius
adds px
automatically.
If you want to use syntax like 10px \ 5px
, you have to interpolate argument ~''
or LESS CSS divides it (yeah awesome feature!).
Also LESS Hat adds background-clip: padding-box
, because it fixes problem with older Safari. Here is some resource.
Example:
div {
.border-bottom-right-radius(10px);
}
// Result
div {
-webkit-border-bottom-right-radius: 10px;
-moz-border-radius-bottomright: 10px;
border-bottom-right-radius: 10px;
}
• border-image
Summary:
The border-image CSS property allows drawing an image on the borders of elements. This makes drawing complex looking widgets much simpler than it has been and removes the need for nine boxes in some cases.
Resources: WebPlatform, MDN
Syntax:
Default value: based on individual properties
.border-image(border-image-source border-image-slice border-image-width border-image-outset border-image-repeat)
Tips and tricks:
If you call mixin without arguments, LESS Hat does not generate anything. Good border-image online generator.
Example:
div {
.border-image(url(border.png) 61 45 62 54 repeat);
}
// Result
div {
-webkit-border-image: url(border.png) 61 45 62 54 repeat;
-moz-border-image: url(border.png) 61 45 62 54 repeat;
-o-border-image: url(border.png) 61 45 62 54 repeat;
border-image: url(border.png) 61 45 62 54 repeat;
}
• border-radius
Summary:
The border-radius CSS property allows Web authors to define how rounded border corners are. The curve of each corner is defined using one or two radii, defining its shape: circle or ellipse.
Resources: WebPlatform, MDN
Syntax:
Default value: 0
.border-radius(length | percentage | length / length | percentage / percentage)
Tips and tricks:
If you omit units, border-radius
adds px
automatically.
If you want to use syntax like 10px \ 5px
, you have to interpolate argument ~''
or LESS CSS divides it (yeah awesome feature!).
Also LESS Hat adds background-clip: padding-box
, because it fixes problem with older Safari. Here is some resource.
Example:
div {
.border-radius(5px);
}
// Result
div {
-webkit-border-radius: 5px;
-moz-border-radius: 5px;
border-radius: 5px;
}
• border-top-left-radius
Summary:
The border-top-left-radius CSS property sets the rounding of the top-left corner of the element. The rounding can be a circle or an ellipse, or if one of the value is 0 no rounding is done and the corner is square.
Resources: WebPlatform, MDN
Syntax:
Default value: 0
.border-top-left-radius(length | percentage)
Tips and tricks:
If you omit units, border-top-left-radius
adds px
automatically.
If you want to use syntax like 10px \ 5px
, you have to interpolate argument ~''
or LESS CSS divides it (yeah awesome feature!).
Also LESS Hat adds background-clip: padding-box
, because it fixes problem with older Safari. Here is some resource.
Example:
div {
.border-top-left-radius(5px);
}
// Result
div {
-webkit-border-top-left-radius: 5px;
-moz-border-top-left-radius: 5px;
border-top-left-radius: 5px;
}
• border-top-right-radius
Summary:
The border-top-right-radius CSS property sets the rounding of the top-right corner of the element. The rounding can be a circle or an ellipse, or if one of the value is 0 no rounding is done and the corner is square.
Resources: WebPlatform, MDN
Syntax:
Default value: 0
.border-top-right-radius(length | percentage)
Tips and tricks:
If you omit units, border-top-right-radius
adds px
automatically.
If you want to use syntax like 10px \ 5px
, you have to interpolate argument ~''
or LESS CSS divides it (yeah awesome feature!).
Also LESS Hat adds background-clip: padding-box
, because it fixes problem with older Safari. Here is some resource.
Example:
div {
.border-top-right-radius(5px);
}
// Result
div {
-webkit-border-top-right-radius: 5px;
-moz-border-top-right-radius: 5px;
border-top-right-radius: 5px;
}
• box-shadow
Summary:
The box-shadow CSS property describes one or more shadow effects as a comma-separated list. It allows casting a drop shadow from the frame of almost any element. If a border-radius is specified on the element with a box shadow, the box shadow takes on the same rounded corners. The z-ordering of multiple box shadows is the same as multiple text shadows (the first specified shadow is on top).
Resources: WebPlatform, MDN
Syntax:
Default value: none
.box-shadow(<offset-x> <offset-y> spread blur-radius color inset, …)
Tips and tricks:
If you omit units, box-shadow
adds px
automatically.
Example:
div {
.box-shadow(0 1px 10px rgba(20,20,20,0.5));
}
// Result
div {
-webkit-box-shadow: 0 1px 10px rgba(20,20,20,0.5);
-moz-box-shadow: 0 1px 10px rgba(20,20,20,0.5);
box-shadow: 0 1px 10px rgba(20,20,20,0.5);
}
• box-sizing
Summary:
The box-sizing CSS property is used to alter the default CSS box model used to calculate widths and heights of elements. It is possible to use this property to emulate the behavior of browsers that do not correctly support the CSS box model specification.
Resources: WebPlatform, MDN
Syntax:
Default value: content-box
.box-sizing(content-box | padding-box | border-box)
Example:
div {
.box-sizing(padding-box);
}
// Result
div {
-webkit-box-sizing: padding-box;
-moz-box-sizing: padding-box;
box-sizing: padding-box;
}
• brightness (shorthand for filter property)
Summary:
Applies a linear multiplier to input image, making it appear more or less bright. A value of 0% will create an image that is completely black. A value of 100% leaves the input unchanged. Other values are linear multipliers on the effect. Values of an amount over 100% are allowed, providing brighter results. If the ‘amount’ parameter is missing, a value of 100% is used.
Resources: MDN
Syntax:
Default value: 0
.brightness(amount)
Example:
div {
.brightness(0.5);
}
// Result
div {
-webkit-filter: brightness(0.5);
-moz-filter: brightness(0.5);
-ms-filter: brightness(0.5);
filter: brightness(0.5);
}
• calc
Summary:
The calc() CSS function can be used anywhere a <length>
, <frequency>
, <angle>
, <time>
, <number>
, or <integer>
is required.With calc(), you can perform calculations to determine CSS property values.
THIS MIXIN MUST BE INTERPOLATED ~''
The -lh-property: 0
junk line of code is a neccesary sacrifice due to the hack nature of this set of mixins. (via less-properties)
Resources: MDN
Syntax:
.calc(<element>, ~'<expression>')
Example:
div {
.calc(width, ~'100% - 33px');
}
// Result
div {
-lh-property: 0;
width:-webkit-calc(100% - 33px);
width:-moz-calc(100% - 33px);
width:calc(100% - 33px);
}
• column-count
Summary:
The column-count CSS property describes the number of columns of the element.
Resources: WebPlatform, MDN
Syntax:
Default value: auto
.column-count(<number> | auto)
Example:
div {
.column-count(3);
}
// Result
div {
-webkit-column-count: 0.5;
-moz-column-count: 0.5;
column-count: 0.5;
}
• column-gap
Summary:
The column-gap CSS property sets the size of the gap between columns for elements which are specified to display as a multi-column element.
Resources: WebPlatform, MDN
Syntax:
Default value: normal
.column-gap(<length> | normal)
Tips and tricks:
If you omit units, column-gap
adds px
automatically.
Example:
div {
.column-gap(30);
}
// Result
div {
-webkit-column-gap: 30px;
-moz-column-gap: 30px;
column-gap: 30px;
}
• column-rule
Summary:
In multi-column layouts, the column-rule CSS property specifies a straight line, or "rule", to be drawn between each column.
Resources: WebPlatform, MDN
Syntax:
Default value: medium none black
.column-rule(<column-rule-width> | <column-rule-style> | <column-rule-color>)
Tips and tricks:
If you omit units, column-rule
adds px
automatically.
Example:
div {
.column-rule(5 outset #ff00ff);
}
// Result
div {
-webkit-column-rule: 5px outset #ff00ff;
-moz-column-rule: 5px outset #ff00ff;
column-rule: 5px outset #ff00ff;
}
• column-width
Summary:
The column-width CSS property suggests an optimal column width. This is not a absolute value but a mere hint. Browser will adjust the width of the column around that suggested value, allowing to achieve scalable designs that fit different screen size.
Resources: WebPlatform, MDN
Syntax:
Default value: auto
.column-width(<length> | auto)
Tips and tricks:
If you omit units, column-width
adds px
automatically.
Example:
div {
.column-width(100px);
}
// Result
div {
-webkit-column-width: 100px;
-moz-column-width: 100px;
column-width: 100px;
}
• columns
Summary:
The columns CSS property is a shorthand property allowing to set both the column-width and the column-count properties at the same time.
Resources: WebPlatform, MDN
Syntax:
Default value: auto
.columns(<column-width> | <column-count>)
Tips and tricks:
If you omit units for column-width argument, columns
adds px
to it automatically.
Example:
div {
.columns(100 3);
}
// Result
div {
-webkit-columns: 100px 3;
-moz-columns: 100px 3;
columns: 100px 3;
}
• contrast
Summary:
Adjusts the contrast of the input. A value of 0% will create an image that is completely black. A value of 100% leaves the input unchanged. Values of amount over 100% are allowed, providing results with less contrast. If the ‘amount’ parameter is missing, a value of 100% is used.
Resources: MDN
Syntax:
Default value: 100%
.contrast(<amount>)
Tips and tricks:
If you omit units, contrast
adds %
automatically.
Example:
div {
.contrast(200);
}
// Result
div {
-webkit-filter: contrast(200%);
-moz-filter: contrast(200%);
-ms-filter: contrast(200%);
filter: contrast(200%);
}
• display
Summary:
The display CSS property specifies the type of rendering box used for an element. This mixin is specifically for flexbox purpose.
Resources: CSS-Tricks
Syntax:
.display(<flex> | <inline-flex>)
Example:
div {
.display(flex);
}
// Result
div {
display: -webkit-box;
display: -ms-flexbox;
display: -webkit-flex;
display: -moz-box;
}
• drop-shadow
Summary:
Applies a drop shadow effect to the input image. A drop shadow is effectively a blurred, offset version of the input image's alpha mask drawn in a particular color, composited below the image.
Resources: MDN
Syntax:
.drop-shadow(<offset-x> <offset-y> [<blur-radius> | <spread-radius> | <color>])
Tips and tricks:
If you omit units, drop-shadow
adds px
automatically.
Example:
div {
.drop-shadow(16 16 10 black);
}
// Result
div {
-webkit-filter: drop-shadow(16px 16px 10px #000000);
-moz-filter: drop-shadow(16px 16px 10px #000000);
-ms-filter: drop-shadow(16px 16px 10px #000000);
filter: drop-shadow(16px 16px 10px #000000);
}
• filter
Summary:
The CSS filter property provides for effects like blurring or color shifting on an element’s rendering before the element is displayed. Filters are commonly used to adjust the rendering of an image, a background, or a border.
Resources: MDN
Syntax:
Default value: none
.filter(<filter-function>*)
Example:
div {
.filter(grayscale(0.5) blur(10px));
}
// Result
div {
-webkit-filter: grayscale(0.5) blur(10px);
-moz-filter: grayscale(0.5) blur(10px);
-ms-filter: grayscale(0.5) blur(10px);
filter: grayscale(0.5) blur(10px);
}
• flex
Summary:
The flex CSS property specifies ability of a flex item to alter their dimensions to fill the available space. Flex items can be stretched to use available space proportional to their flex grow factor or their flex shrink factor to prevent overflow.
Resources: MDN, CSS-Tricks
Syntax:
Default value: 0 1 auto
.flex(none | [ <flex-grow> <flex-shrink> | <flex-basis> ])
Example:
div {
.flex(1 3 100px);
}
// Result
div {
-webkit-box-flex: 1;
-moz-box-flex: 1;
-webkit-flex: 1 3 100px;
-ms-flex: 1 3 100px;
flex: 1 3 100px;
}
• flex-basis
Summary:
The CSS flex-basis property specifies the flex basis which is the initial main size of a flex item.
Resources: MDN, CSS-Tricks
Syntax:
Default value: auto
.flex-basis(<width>)
Tips and tricks:
If you omit units, flex-basis
adds px
automatically.
Example:
div {
.flex-basis(100);
}
// Result
div {
-webkit-flex-basis: 100;
flex-basis: 100px;
}
• flex-direction
Summary:
The CSS flex-direction property specifies how flex items are placed in the flex container defining the main axis and the direction (normal or reversed).
Resources: MDN, CSS-Tricks
Syntax:
Default value: row
.flex-direction(row | row-reverse | column | column-reverse)
Example:
div {
.flex-direction(row);
}
// Result
div {
-webkit-box-direction: normal;
-moz-box-direction: normal;
-webkit-box-orient: horizontal;
-moz-box-orient: horizontal;
-webkit-flex-direction: row;
-ms-flex-direction: row;
flex-direction: row;
}
• flex-grow
Summary:
The CSS flex-grow property specifies the flex grow factor of a flex item.
Resources: MDN, CSS-Tricks
Syntax:
Default value: 0
.flex-grow(<number>)
Example:
div {
.flex-grow(2);
}
// Result
div {
-webkit-flex-grow: 2;
flex-grow: 2;
}
• flex-shrink
Summary:
The CSS flex-shrink property specifies the flex shrink factor of a flex item.
Resources: MDN, CSS-Tricks
Syntax:
Default value: 1
.flex-shrink(<number>)
Example:
div {
.flex-shrink(2);
}
// Result
div {
-webkit-flex-shrink: 2;
flex-shrink: 2;
}
• flex-wrap
Summary:
The CSS flex-wrap property specifies whether the children are forced into a single line or if the items can be flowed on multiple lines.
Resources: MDN, CSS-Tricks
Syntax:
Default value: nowrap
.flex-wrap(nowrap | wrap | wrap-reverse)
Example:
div {
.flex-wrap(wrap-reverse);
}
// Result
div {
-webkit-flex-wrap: 2;
-ms-flex-wrap: 2;
flex-wrap: 2;
}
• font-face
Summary:
The @font-face CSS at-rule allows authors to specify online fonts to display text on their web pages.
Resources: MDN
Syntax:
.font-face(@fontname, @fontfile, @fontweight:normal, @fontstyle:normal)
Example:
div {
.font-face(Hipster, ~'../fonts/hipster', bold, italic);
}
// Result
div {
font-family: "Hipster";
src: url("../fonts/hipster.eot");
src: url("../fonts/hipster.eot?#iefix") format("embedded-opentype"), url("../fonts/hipster.woff") format("woff"), url("../fonts/hipster.ttf") format("truetype"), url("../fonts/hipster.svg#Hipster") format("svg");
font-weight: bold;
font-style: italic;
}
• grayscale
Summary:
Converts the input image to grayscale. The value of ‘amount’ defines the proportion of the conversion. A value of 100% is completely grayscale. A value of 0% leaves the input unchanged. Values between 0% and 100% are linear multipliers on the effect. If the ‘amount’ parameter is missing, a value of 100% is used.
Resources: MDN
Syntax:
Default value: 0
.grayscale(<percentage>)
Tips and tricks:
If you omit units, grayscale
adds %
automatically.
Example:
div {
.grayscale(50);
}
// Result
div {
-webkit-filter: grayscale(50%);
-moz-filter: grayscale(50%);
-ms-filter: grayscale(50%);
filter: grayscale(50%);
}
• hue-rotate
Summary:
Applies a hue rotation on the input image. The value of ‘angle’ defines the number of degrees around the color circle the input samples will be adjusted. A value of 0deg leaves the input unchanged. If the ‘angle’ parameter is missing, a value of 0deg is used. Maximum value is 360deg.
Resources: MDN
Syntax:
Default value: 0
.hue-rotate(<percentage>)
Tips and tricks:
If you omit units, hue-rotate
adds deg
automatically.
Example:
div {
.hue-rotate(50);
}
// Result
div {
-webkit-filter: hue-rotate(50deg);
-moz-filter: hue-rotate(50deg);
-ms-filter: hue-rotate(50deg);
filter: hue-rotate(50deg);
}
• hyphens
Summary:
The hyphens CSS property tells the browser how to go about splitting words to improve the layout of text when line-wrapping.
Resources: MDN
Syntax:
Default value: manual
.hyphens(none | manual | auto)
Example:
div {
.hyphens(none);
}
// Result
div {
-webkit-hyphens: none;
-moz-hyphens: none;
-ms-hyphens: none;
}
• invert
Summary:
Inverts the samples in the input image. The value of ‘amount’ defines the proportion of the conversion. A value of 100% is completely inverted. A value of 0% leaves the input unchanged. Values between 0% and 100% are linear multipliers on the effect. If the ‘amount’ parameter is missing, a value of 100% is used.
Resources: MDN
Syntax:
Default value: 0
.invert(<percentage>)
Tips and tricks:
If you omit units, invert
adds %
automatically.
Example:
div {
.invert(100);
}
// Result
div {
-webkit-filter: invert(100%);
-moz-filter: invert(100%);
-ms-filter: invert(100%);
filter: invert(100%);
}
• justify-content
Summary:
The CSS justify-content property defines how a browser distributes available space between and around elements when aligning flex items in the main-axis of the current line.
Resources: MDN, CSS-Tricks
Syntax:
Default value: flex-start
.justify-content(flex-start | flex-end | center | space-between | space-around)
Example:
div {
.justify-content(flex-start);
}
// Result
div {
-webkit-box-pack: flex-start;
-moz-box-pack: start;
-webkit-justify-content: start;
-ms-flex-pack: flex-start;
justify-content: flex-start;
}
• keyframes
Summary:
The @keyframes CSS at-rule lets authors control the intermediate steps in a CSS animation sequence by establishing keyframes (or waypoints) along the animation sequence that must be reached by certain points during the animation.
LESS CSS isn't great for complicated mixin like this one, so it's little bit tricky. LESS CSS compiler doesn't allow to have properties in the root. It's better to understand the problem on the example.
// There is no selector
color: red;
SyntaxError: properties must be inside selector blocks, they cannot be in the root.
div { color: red; } // This is correct
Therefore LESS Hat generates placeholder selector lesshat-selector { -lh-property: 0; }
with unknown property, which browsers ignore and after that, there is actually keyframes syntax.
And also because of bad architecture of LESS CSS language, keyframes definition has to be on single line.
THIS MIXIN MUST BE INTERPOLATED ~''
Resources: WebPlatform, MDN
Syntax:
.keyframes(~'<keyframes-name>, <keyframes-definition>')
Tips and tricks:
Properties inside <keyframes-definition>
are automatically prefixed, if it's needed.
Keyframes mixin supports prefix configuration but it's computationally demanding so it is commented out and all prefixes are rendered. Feel free to uncommented that if you need it.
Example:
.keyframes(~'animationName, 0%{ transform: scale(1.5); color: blue; } 100%{ transform: scale(2); color: red }');
// Result
lesshat-selector {-lh-property: 0; }
@-webkit-keyframes animationName{ 0%{ -webkit-transform: scale(1.5); color: blue; } 100%{ -webkit-transform: scale(2); color: red }}
@-moz-keyframes animationName{ 0%{ -moz-transform: scale(1.5); color: blue; } 100%{ -moz-transform: scale(2); color: red }}
@-o-keyframes animationName{ 0%{ -o-transform: scale(1.5); color: blue; } 100%{ -o-transform: scale(2); color: red }}
@keyframes animationName{ 0%{ transform: scale(1.5); color: blue; } 100%{ transform: scale(2); color: red };}
• opacity
Summary:
The opacity CSS property specifies the transparency of an element, that is, the degree to which the background behind the element is overlaid.
This is not shorthand method for filter opacity.
Resources: MDN
Syntax:
Default value: 1
.opacity(<number>)
Tips and tricks:
You can enable old filter syntax for IE6, just set @ms_local: true
.
Example:
div {
.opacity(.5);
}
// Result
div {
-webkit-opacity: 0.5;
-moz-opacity: 0.5;
opacity: 0.5;
}
• order
Summary:
The CSS order property specifies the order used to lay out flex items in their flex container.
Resources: MDN, CSS-Tricks
Syntax:
Default value: 0
.order(<integer>)
Example:
div {
.order(1);
}
// Result
div {
-webkit-box-ordinal-group: 1;
-moz-box-ordinal-group: 1;
-ms-flex-order: 1;
-webkit-order: 1;
order: 1;
}
• perspective
Summary:
The perspective CSS property determines the distance between the z=0 plane and the user in order to give to the 3D-positioned element some perspective.
Resources: MDN, CSS-Tricks
Syntax:
Default value: none
.perspective(none | <length>)
Tips and tricks:
If you omit units, perspective
adds px
automatically.
Example:
div {
.perspective(1000);
}
// Result
div {
-moz-perspective: 1000px;
-webkit-perspective: 1000px;
perspective: 1000px;
}
• perspective-origin
Summary:
The perspective-origin CSS property determines the position the viewer is looking at. It is used as the vanishing point by the perspective property.
Resources: MDN, CSS-Tricks
Syntax:
Default value: 50% 50%
.perspective-origin(<percentage> | <length> | constants | inherit)
Tips and tricks:
If you omit units, perspective-origin
adds %
automatically.
Example:
div {
.perspective-origin(top left);
}
// Result
div {
-moz-perspective-origin: top left;
-webkit-perspective-origin: top left;
perspective-origin: top left;
}
• placeholder
Summary:
Placeholder is the short hint displayed in the input field before the user clicked to it. Default placeholder text in inputs has a light gray color (so far).
Resources: CSS-Tricks
Syntax:
.placeholder(<color>, [<element>])
Example:
div {
.placeholder(#666666);
}
// Result
div::-webkit-input-placeholder {
color: #666666;
}
div:-moz-placeholder {
color: #666666;
}
div::-moz-placeholder {
color: #666666;
}
div:-ms-input-placeholder {
color: #666666;
}
// In root (outside of selectors)
.placeholder(#333333);
// Result
::-webkit-input-placeholder {
color: #666666;
}
:-moz-placeholder {
color: #666666;
}
::-moz-placeholder {
color: #666666;
}
:-ms-input-placeholder {
color: #666666;
}
// In root (outside of selectors)
.placeholder(#333333, textarea);
// Result
textarea::-webkit-input-placeholder {
color: #666666;
}
textarea:-moz-placeholder {
color: #666666;
}
textarea::-moz-placeholder {
color: #666666;
}
textarea:-ms-input-placeholder {
color: #666666;
}
• rotate
Summary:
Rotates the element clockwise around its origin by the specified angle.
Resources: MDN
Syntax:
Default value: 0
.rotate(<angle>)
Tips and tricks:
If you omit units, rotate
adds deg
automatically.
Example:
div {
.rotate(45);
}
// Result
div {
-webkit-transform: rotate(45deg);
-moz-transform: rotate(45deg);
-ms-transform: rotate(45deg);
-o-transform: rotate(45deg);
transform: rotate(45deg);
}
• rotate3d
Summary:
The rotate3d()CSS function defines a transformation that moves the element around a fixed axe without deforming it.
Resources: MDN
Syntax:
Default value: 0, 0, 0, 0
.rotate3d(<number>, <number>, <number>, <angle>)
Tips and tricks:
If you omit angle unit, rotate3d
adds deg
automatically.
Example:
div {
.rotate3d(1, 0, 0, 50);
}
// Result
div {
-webkit-transform: rotate3d(1, 0, 0, 50deg);
-moz-transform: rotate3d(1, 0, 0, 50deg);
-ms-transform: rotate3d(1, 0, 0, 50deg);
-o-transform: rotate3d(1, 0, 0, 50deg);
transform: rotate3d(1, 0, 0, 50deg);
}
• rotateX
Summary:
The rotateX() CSS function defines a transformation that moves the element around the abscissa without deforming it.
Resources: MDN
Syntax:
Default value: 0
.rotateX(<angle>)
Tips and tricks:
If you omit units, rotateX
adds deg
automatically.
Example:
div {
.rotateX(45);
}
// Result
div {
-webkit-transform: rotateX(45deg);
-moz-transform: rotateX(45deg);
-ms-transform: rotateX(45deg);
-o-transform: rotateX(45deg);
transform: rotateX(45deg);
}
• rotateY
Summary:
The rotateY() CSS function defines a transformation that moves the element around the ordinate without deforming it.
Resources: MDN
Syntax:
Default value: 0
.rotateY(<angle>)
Tips and tricks:
If you omit units, rotateY
adds deg
automatically.
Example:
div {
.rotateY(45);
}
// Result
div {
-webkit-transform: rotateY(45deg);
-moz-transform: rotateY(45deg);
-ms-transform: rotateY(45deg);
-o-transform: rotateY(45deg);
transform: rotateY(45deg);
}
• rotateZ
Summary:
The rotateZ() CSS function defines a transformation that moves the element around the z-axis without deforming it.
Resources: MDN
Syntax:
Default value: 0
.rotateZ(<angle>)
Tips and tricks:
If you omit units, rotateZ
adds deg
automatically.
Example:
div {
.rotateZ(45);
}
// Result
div {
-webkit-transform: rotateZ(45deg);
-moz-transform: rotateZ(45deg);
-ms-transform: rotateZ(45deg);
-o-transform: rotateZ(45deg);
transform: rotateZ(45deg);
}
• saturate
Summary:
Saturates the input image. The value of ‘amount’ defines the proportion of the conversion.
Resources: MDN
Syntax:
Default value: 100%
.saturate(<amount>)
Tips and tricks:
If you omit units, saturate
adds %
automatically.
Example:
div {
.saturate(45);
}
// Result
div {
-webkit-filter: saturate(45deg);
-moz-filter: saturate(45deg);
-ms-filter: saturate(45deg);
filter: saturate(45deg);
}
• scale
Summary:
Specifies a 2D scaling operation described by [sx, sy]. If sy isn't specified, it is assumed to be equal to sx.
Resources: MDN
Syntax:
Default value: 1
.scale(<sx>[, <sy>])
Example:
div {
.scale(2);
}
// Result
div {
-webkit-transform: scale(2);
-moz-transform: scale(2);
-ms-transform: scale(2);
-o-transform: scale(2);
transform: scale(2);
}
• scale3d
Summary:
The scale3d() CSS function modifies the size of an element. Because the amount of scaling is defined by a vector, it can resize different dimensions at different scales.
Resources: MDN
Syntax:
Default value: 1, 1, 1
.scale3d(<sx>, <sy>, <sz>)
Example:
div {
.scale3d(1.5, .2, 3);
}
// Result
div {
-webkit-transform: scale3d(1.5, 0.2, 3);
-moz-transform: scale3d(1.5, 0.2, 3);
-ms-transform: scale3d(1.5, 0.2, 3);
-o-transform: scale3d(1.5, 0.2, 3);
transform: scale3d(1.5, 0.2, 3);
}
• scaleX
Summary:
Specifies a scale operation using the vector [sx, 1].
Resources: MDN
Syntax:
Default value: 1
.scaleX(<sx>)
Example:
div {
.scaleX(1.5);
}
// Result
div {
-webkit-transform: scaleX(1.5);
-moz-transform: scaleX(1.5);
-ms-transform: scaleX(1.5);
-o-transform: scaleX(1.5);
transform: scaleX(1.5);
}
• scaleY
Summary:
Specifies a scale operation using the vector [1, sy].
Resources: MDN
Syntax:
Default value: 1
.scaleY(<sy>)
Example:
div {
.scaleY(1.5);
}
// Result
div {
-webkit-transform: scaleY(1.5);
-moz-transform: scaleY(1.5);
-ms-transform: scaleY(1.5);
-o-transform: scaleY(1.5);
transform: scaleY(1.5);
}
• scaleZ
Summary:
The scaleZ() CSS function modifies the z-coordinate of each element point by a constant facto, except if this scale factor is 1, in which case the function is the identity transform.
Resources: MDN
Syntax:
Default value: 1
.scaleZ(<sz>)
Example:
div {
.scaleZ(1.5);
}
// Result
div {
-webkit-transform: scaleZ(1.5);
-moz-transform: scaleZ(1.5);
-ms-transform: scaleZ(1.5);
-o-transform: scaleZ(1.5);
transform: scaleZ(1.5);
}
• selection
Summary:
The ::selection CSS pseudo-element applies rules to the portion of a document that has been highlighted. LESS CSS compiler doesn't allow to have properties in the root. It's better to understand the problem on the example.
// There is no selector
color: red;
SyntaxError: properties must be inside selector blocks, they cannot be in the root.
div { color: red; } // This is correct
Therefore LESS Hat generates placeholder selector lesshat-selector { -lh-property: 0; }
with un