html-srcsets-loader

variant of the html loader module for webpack with a patch to load srcset attribute(s)

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!npmnpmnpm-url !depsdepsdeps-url !testtesttest-url !coveragecovercover-url !chatchatchat-url
src="https://worldvectorlogo.com/logos/html5.svg">
<img width="200" height="200" vspace="" hspace="25"
  src="https://worldvectorlogo.com/logos/webpack.svg">
HTML Loader

Exports HTML as string. HTML is minimized when the compiler demands.


Install


npm i -D html-loader

Usage


By default every local <img src="image.png"> is required (require('./image.png')). You may need to specify loaders for images in your configuration (recommended file-loader or url-loader).
Also every <img srcset="..."> is converted to require statements. For example
<img src="image.jpg" srcset="image.jpg 1x, image@2x.jpg 2x">
is converted to
"<img src=\"" + require("./image.jpg") + "\" srcset=\"" + require("./image.jpg") + " 1x, " + require("./image@2x.jpg") + " 2x \">"

You can specify which tag-attribute combination should be processed by this loader via the query parameter attrs. Pass an array or a space-separated list of <tag>:<attribute> combinations. (Default: attrs=[img:src, img:srcset]). The srcset-specific qualifiers such as 100w or 3x are supported in any processed attribute.
If you use <custom-elements>, and lots of them make use of a custom-src attribute, you don't have to specify each combination <tag>:<attribute>: just specify an empty tag like attrs=:custom-src and it will match every element.
{
  test: /\.(html)$/,
  use: {
    loader: 'html-loader',
    options: {
      attrs: [':data-src']
    }
  }
}

To completely disable tag-attribute processing (for instance, if you're handling image loading on the client side) you can pass in attrs=false.

Examples


With this configuration:
{
  module: {
    rules: [
      { test: /\.jpg$/, use: [ "file-loader" ] },
      { test: /\.png$/, use: [ "url-loader?mimetype=image/png" ] }
    ]
  },
  output: {
    publicPath: "http://cdn.example.com/[hash]/"
  }
}

<!-- file.html -->
<img src="image.png" data-src="image2x.png" >

require("html-loader!./file.html");

// => '<img src="http://cdn.example.com/49eba9f/a992ca.png"
//         data-src="image2x.png">'

require("html-loader?attrs=img:data-src!./file.html");

// => '<img src="image.png" data-src="data:image/png;base64,..." >'

require("html-loader?attrs=img:src img:data-src!./file.html");
require("html-loader?attrs[]=img:src&attrs[]=img:data-src!./file.html");

// => '<img  src="http://cdn.example.com/49eba9f/a992ca.png"        
//           data-src="data:image/png;base64,..." >'

require("html-loader?-attrs!./file.html");

// => '<img  src="image.jpg"  data-src="image2x.png" >'

minimized by running webpack --optimize-minimize
'<img src=http://cdn.example.com/49eba9f/a9f92ca.jpg
      data-src=data:image/png;base64,...>'

or specify the minimize property in the rule's options in your webpack.conf.js
module: {
  rules: [{
    test: /\.html$/,
    use: [ {
      loader: 'html-loader',
      options: {
        minimize: true
      }
    }],
  }]
}

The enabled rules for minimizing by default are the following ones: - removeComments - removeCommentsFromCDATA - removeCDATASectionsFromCDATA - collapseWhitespace - conservativeCollapse - removeAttributeQuotes - useShortDoctype - keepClosingSlash - minifyJS - minifyCSS - removeScriptTypeAttributes - removeStyleTypeAttributes The rules can be disabled using the following options in your webpack.conf.js
module: {
  rules: [{
    test: /\.html$/,
    use: [ {
      loader: 'html-loader',
      options: {
        minimize: true,
        removeComments: false,
        collapseWhitespace: false
      }
    }],
  }]
}

'Root-relative' URLs

For urls that start with a /, the default behavior is to not translate them. If a root query parameter is set, however, it will be prepended to the url and then translated.
With the same configuration as above:
<!-- file.html -->
<img src="/image.jpg">

require("html-loader!./file.html");

// => '<img  src="/image.jpg">'

require("html-loader?root=.!./file.html");

// => '<img  src="http://cdn.example.com/49eba9f/a992ca.jpg">'

Interpolation

You can use interpolate flag to enable interpolation syntax for ES6 template strings, like so:
require("html-loader?interpolate!./file.html");

<img src="${require(`./images/gallery.png`)}">

<div>${require('./components/gallery.html')}</div>
And if you only want to use require in template and any other ${} are not to be translated, you can set interpolate flag to require, like so:
require("html-loader?interpolate=require!./file.ftl");

<#list list as list>
  <a href="${list.href!}" />${list.name}</a>
</#list>

<img src="${require(`./images/gallery.png`)}">

<div>${require('./components/gallery.html')}</div>

Export formats

There are different export formats available:
  • ``module.exports` (default, cjs format). "Hello world" becomes `module.exports = "Hello world";`
  • `exports.default` (when `exportAsDefault` param is set, es6to5 format). "Hello world" becomes `exports.default = "Hello world";`
  • `export default` (when `exportAsEs6Default` param is set, es6 format). "Hello world" becomes `export default "Hello world";``

Advanced options

If you need to pass more advanced options, especially those which cannot be stringified, you can also define an htmlLoader-property on your webpack.config.js:
var path = require('path')

module.exports = {
  ...
  module: {
    rules: [
      {
        test: /\.html$/,
        use: [ "html-loader" ]
      }
    ]
  },
  htmlLoader: {
    ignoreCustomFragments: [/\{\{.*?}}/],
    root: path.resolve(__dirname, 'assets'),
    attrs: ['img:src', 'link:href']
  }
};

If you need to define two different loader configs, you can also change the config's property name via html-loader?config=otherHtmlLoaderConfig:
module.exports = {
  ...
  module: {
    rules: [
      {
        test: /\.html$/,
        use: [ "html-loader?config=otherHtmlLoaderConfig" ]
      }
    ]
  },
  otherHtmlLoaderConfig: {
    ...
  }
};

Export into HTML files

A very common scenario is exporting the HTML into their own .html file, to serve them directly instead of injecting with javascript. This can be achieved with a combination of 3 loaders:

The html-loader will parse the URLs, require the images and everything you expect. The extract loader will parse the javascript back into a proper html file, ensuring images are required and point to proper path, and the file loader will write the .html file for you. Example:
{
  test: /\.html$/,
  use: [ 'file-loader?name=[path][name].[ext]!extract-loader!html-loader' ]
}

Maintainers


<tr>
  <td align="center">
    <img width="150" height="150"
    src="https://avatars.githubusercontent.com/u/18315?v=3">
    </br>
    <a href="https://github.com/hemanth">Hemanth</a>
  </td>
  <td align="center">
    <img width="150" height="150"
    src="https://avatars.githubusercontent.com/u/8420490?v=3">
    </br>
    <a href="https://github.com/d3viant0ne">Joshua Wiens</a>
  </td>
  <td align="center">
    <img width="150" height="150" src="https://avatars.githubusercontent.com/u/5419992?v=3">
    </br>
    <a href="https://github.com/michael-ciniawsky">Michael Ciniawsky</a>
  </td>
  <td align="center">
    <img width="150" height="150"
    src="https://avatars.githubusercontent.com/u/6542274?v=3">
    </br>
    <a href="https://github.com/imvetri">Imvetri</a>
  </td>
</tr>
<tr>
  <td align="center">
    <img width="150" height="150"
    src="https://avatars.githubusercontent.com/u/1520965?v=3">
    </br>
    <a href="https://github.com/andreicek">Andrei Crnković</a>
  </td>
  <td align="center">
    <img width="150" height="150"
    src="https://avatars.githubusercontent.com/u/3367801?v=3">
    </br>
    <a href="https://github.com/abouthiroppy">Yuta Hiroto</a>
  </td>
  <td align="center">
    <img width="150" height="150" src="https://avatars.githubusercontent.com/u/80044?v=3">
    </br>
    <a href="https://github.com/petrunov">Vesselin Petrunov</a>
  </td>
  <td align="center">
    <img width="150" height="150"
    src="https://avatars.githubusercontent.com/u/973543?v=3">
    </br>
    <a href="https://github.com/gajus">Gajus Kuizinas</a>
  </td>
</tr>