srcset

Parse and stringify the HTML <img> srcset attribute.

Can be useful if you're creating a build-tool.

Install

$ npm install srcset

Usage

How an image with srcset might look like:

<img alt="The Breakfast Combo"
     src="banner.jpg"
     srcset="banner-HD.jpg 2x, banner-phone.jpg 100w, banner-phone-HD.jpg 100w 2x">

Then have some fun with it:

const srcset = require('srcset');

const parsed = srcset.parse('banner-HD.jpg 2x, banner-phone.jpg 100w');
console.log(parsed);
/*
[
	{
		url: 'banner-HD.jpg',
		density: 2
	},
	{
		url: 'banner-phone.jpg',
		width: 100
	}
]
*/

parsed.push({
	url: 'banner-phone-HD.jpg',
	width: 100,
	density: 2
});

const stringified = srcset.stringify(parsed);
console.log(stringified);
/*
banner-HD.jpg 2x, banner-phone.jpg 100w, banner-phone-HD.jpg 100w 2x
*/

API

.parse()

Accepts a srcset string and returns an array of objects with the possible properties: url (always), width, density.

.stringify()

Accepts an array of objects with the possible properties: url (required), width, density and returns a srcset string.