flex-text

Mastering font-size like flexbox for IE 8+:

font-size A:B:C:D = 1:2:1:1

Demo

http://idiotwu.github.io/flex-text/

Install

npm install flex-text

Usage

import FlexText from 'flex-text';

const flexText = new FlexText({
    container: document.querySelector('.container'),
    spacing: 0,
    items: [{
        elem: document.querySelector('.first'),
        flex: 1,
    }, {
        elem: document.querySelector('.second'),
        flex: 2,
    }, ...]
});

Important Notes

Unwanted white space:

You may get white spaces around flex items when they are layouted as inline-block, here's a little trick to it:

.container {
    letter-spacing: -0.31em;
}

.item {
    letter-spacing: normal;
}

Canvas vs Legacy Element

This plugin does text measuring with <span> element. As a result, the created <span> element must be inserted into document so that we can measure boundings. Text measuring with canvas is easier and will calculate at a higher performace. However, using legacy elements keeps us away from incompatibility :)

That's also the reason why I wrote it in es5 flavor.

APIs

new FlexText([options: object])

Construct new instance with supported options:

container: element

The element that holds all flex items.

You can set container later by calling instance#attachTo()

spacing: number

White space between each item.

You can also modify spacing by calling instance#setSpacing().

items: array

A list of flex items:

[{
    elem: element,  // the flex item
    flex: number,   // flex factor, like css flex-grow property
}, ...]

You can also add single flex item by calling instance#addItem().

instance#update()

Update DOM layout at next frame.

instance#setSpacing(value: number)

Change white space between items.

instance#attachTo(container: element)

Set the container element.

instance#addItem(elem: element[, flex: number])

Add single flex item, default flex is 1.

instance#removeItem(elem: element)

Remove item from list by giving item.elem.

instance#clear()

Remove all flex items.

instance#alloc()

Measuring font-size and returning the result like:

[{
    elem: DOMElement,
    fontSize: 123,
}, ...]

License

MIT.