pugsharp
v0.3.3
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Generate responsive images and additional Pug templates, using sharp image processing and JSON configs.
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pugsharp
It's not just sharp, it's pugsharp!
Batch resize and reformat images for your Pug project, based on JSON configuration files! Pugsharp is a Node.js module, designed to streamline the image handling process, saving both time and effort.
How it works
For each source image listed in the JSON configuration file, pugsharp creates a dedicated directory named after the image.
Inside the created directory, you'll find the resized and reformatted images, as well as a Pug file for easy integration into your Pug projects.
How to use it
If you have not already done so, download and install Node.js and npm.
- Navigate to your image directory.
- Create a
pugsharp.json
configuration file. - Run
npx pugsharp
in the console.
Watch the magic happen.
Configuration Files
Put a pugsharp.json
configuration file in your image directory, right next to the images.
Each source image will have its own directory, based on the image name. That's where the generated images will be.
Minimal Configuration
Below is the minimal required configuration for an image in the pugsharp.json
file.
[
{
"img": "pug.png",
"format": "jpeg",
"from": 100,
"to": 1200,
"step": 300
}
]
Extended Configuration
[
{
"img": "pug.png",
"format": "jpeg",
"from": 100,
"to": 1200,
"step": 300,
"special": 10,
"sharp-jpeg": {
"mozjpeg": true,
"quality": 80
}
},
{
"img": "pug2.avif",
"format": ["avif","webp"],
"from": 300,
"to": 2000,
"step": 100,
"special": [1, 40],
"lazy": false,
"data-src": true,
"sharp-avif": {
"quality": 70,
"effort": 7
},
"sharp-webp": {
"quality": 80,
"effort": 5
}
}
]
Configuration Keys
"img"
: File name of the image."format"
: Target image format(s). Array or string."from"
: Smallest target image size."to"
: Largest target image size."step"
: Pixel step size between small and large."special"
: Additional special image size(s)."lazy"
: If false, loading="lazy"
won't be applied to the img element. Default is true
."data-src"
: If true, you'll get <img data-src="...">
, instead of <img src="...">
. Same for <source srcset>
."sharp-*"
: For detailed format options, see the sharp format documentation.
Pug Mixins
Pugsharp generates a Pug mixin template for each processed image, further simplifying the integration of responsive images into your Pug projects.
How to use the Pug Mixins
Within the directory of any processed image, you'll find a complementary pugsharp.pug
file that contains a ready-to-use mixin. This mixin enables easy integration of the generated images.
Simply include the pugsharp.pug
file and call the mixin, providing the image path, alt text and optionally, additional attributes.
Basic Pug Mixin
Include the mixin and call it with the image's file path, alternative text and the sizes property for the source
tags:
+img('img source path', 'alt text, {sizes})
Example:
include pug/pugsharp.pug
+img('pug/pug-100.jpg', 'pug image', {sizes:'3vw'})
Basic HTML Output
Here's how the Pug mixin translates into sample HTML output:
<picture>
<source srcset="pug/pug-100.avif 100w, pug/pug-200.avif 200w" type="image/avif" sizes="3vw">
<source srcset="pug/pug-100.jpg 100w, pug/pug-200.jpg 200w" type="image/jpg" sizes="3vw">
<img src="pug/pug-100.jpg" alt="pug image" loading="lazy">
</picture>
Extended Pug Mixin, with Attributes
Include the mixin and call it with additional attributes:+img('img source path', 'alt text', {attributes})
It is possible to define any valid HTML attribute for the <img>
tag in the mixin, in a JavaScript object:
include img2/pugsharp.pug
+img('img2/img2-200.jpg', 'pug image', {sizes:'4vw', class:'paw', decoding:'sync'})
Only the sizes
property will be added to source
tags. All other attributes will be applied to the img
element.
Extended HTML Output
Sample HTML output with additional attributes on the img
element and sizes
on the source
elements:
<picture>
<source srcset="img2/img2-100.avif 100w, img2/img2-200.avif 200w" type="image/avif" sizes="4vw">
<source srcset="img2/img2-100.jpg 100w, img2/img2-200.jpg 200w" type="image/jpg" sizes="4vw">
<img src="img2/img2-200.jpg" alt="pug image" loading="lazy" class="paw" decoding="sync">
</picture>
See the Mozilla Developer Network (MDN) documentation for more details on image attributes.
Additional Information
- The pugsharp module is designed not to overwrite existing directories or images.
- Only the
pugsharp.pug
files for specified images will be overwritten when you run pugsharp. - If you wish to regenerate images or directories, you must delete them manually beforehand.
- Image directories will be created right next to the
pugsharp.json
configuration file. - It is recommended to place the configuration file in the same directory as the source images.
- If you find a pug, feel free to report it.