Grunt-inline NPM

grunt-inline

Brings externally referenced resources, such as js, css and images, into a single file.

For exmample:

<link href="css/style.css?__inline=true" rel="stylesheet" />

is replaced with

<style>
/* contents of css/style.css */
</style>

JavaScript references are brought inline, and images in the html and css blocks are converted to base-64 data: urls.

By default, only urls marked with __inline are converted, however this behavior can be overrided via the tag: option.

Getting Started

This plugin requires Grunt ~0.4.1

If you haven't used Grunt before, be sure to check out the Getting Started guide, as it explains how to create a Gruntfile as well as install and use Grunt plugins. Once you're familiar with that process, you may install this plugin with this command:

npm install grunt-inline --save-dev

Once the plugin has been installed, it may be enabled inside your Gruntfile with this line of JavaScript:

grunt.loadNpmTasks('grunt-inline');

The "grunt-inline" task

Overview

In your project's Gruntfile, add a section named inline to the data object passed into grunt.initConfig().

grunt.initConfig({
  inline: {
    dist: {
      src: 'src/index.html',
      dest: 'dist/index.html'
    }
  }
});

Options

dest

If dest is assigned, the the source file will be copied to the destination path. eg: src/index.html will be processed and then copied to dist/index.html

grunt.initConfig({
  inline: {
    dist: {
      src: 'src/index.html',
      dest: 'dist/index.html'
    }
  } 
});

cssmin

If cssmin is assigned true, .css will be minified before inlined.

grunt.initConfig({
  inline: {
    dist: {
      options:{
        cssmin: true
      },
      src: 'src/index.html',
      dest: 'dist/index.html'
    }
  }
});

tag (defaults to `__inline`)

Only URLs that contain the value for tag will be inlined. Specify tag: '' to include all urls.

grunt.initConfig({
  inline: {
    dist: {
      options:{
        tag: ''
      },
      src: 'src/index.html',
      dest: 'dist/index.html']
    }
  }
});

inlineTagAttributes

Ability to add attributes string to inline tag.

grunt.initConfig({
  inline: {
    dist: {
      options:{
        inlineTagAttributes: {
          js: 'data-inlined="true"',  // Adds <script data-inlined="true">...</script>
          css: 'data-inlined="true"'  // Adds <style data-inlined="true">...</style>
        },
        src: 'src/index.html',
        dest: 'dist/index.html'
     }
    }
  }
});

uglify

If uglify is assigned true, .js file will be minified before inlined.

grunt.initConfig({
  inline: {
    dist: {
      options:{
        uglify: true
      },
      src: 'src/index.html',
      dest: 'dist/index.html'
    }
  }
});

exts

Setting an exts array allows multiple file extensions to be processed as html.

grunt.initConfig({
  inline: {
    dist: {
      options:{
        exts: ['jade'],
        uglify: true
      },
      src: 'src/index.jade',
      dest: 'dist/index.jade'
    }
  }
});

Usage Examples

config

grunt.initConfig({
  inline: {
  	dist: {
  	  src: 'src/index.html'
  	}
  }
});

src/index.html

<html>
<head>
  <title>demo</title>
  <link href="css/style.css?__inline=true" rel="stylesheet" />
</head>
<body>
  <img src="img/icon.png?__inline=true" />

  <script src="js/erport.js?__inline=true"></script>
</body>
</html>

after grunt inline was run, it will be something like

<html>
<head>
  <title>demo</title>
  <style>
  .container{
    padding: 0;
    }
  </style>
</head>
<body>
  <! -- base64, a terrible mass you know…so just show a little bit ...--> 
  <img src="idata:image/png;base64data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAEMAAAAYCAYAAAChg0BHAA..." />

  <script>
  var Report = (function(){ 
    return {
      init: function(){
      }
    };
  })();
</script>
</body>
</html>

inline tag

Suppose there is an <inline> tag in index.html like bellow

<!-- inline tag -->
<inline src="test.html" />

The content of test.html is

<p>I'm inline html</p>
<span>hello world!</span>

Then, after the inline task is run, the original content in index.html will be replaced with

<p>I'm inline html</p>
<span>hello world!</span>

Contributing

In lieu of a formal styleguide, take care to maintain the existing coding style. Add unit tests for any new or changed functionality. Lint and test your code using Grunt.

Release History

2019-12-20 v0.3.7 document optimized: markdown style problems of README
2015-01-09 v0.3.3 bug fix: when processing files of a folder and then copy the processed content to another destination, the original files are changed unexpectedly, as mentioned in this issue Support file globbing for input and output
2014-06-16 v0.3.1 bug fix: protocol-relative urls in css are messed up
2014-06-15 v0.3.1 bug fix: when options.tag is '', then all img tags, whose src attribute has already been inlined will be matched.
2014-05-19 v0.3.0 support for new options.exts
2014-05-19 v0.2.9 bug fix: options.tag is assigned '', bug image url in css are not converted to base64 formate
2014-03-06 v0.2.6 bug fix: script tags like \n were not inlined
2014-01-31 v0.2.3 radded tag option, encode url(..) images.
2013-10-31 v0.2.2 bug fix: img urls like 'background: url(http://www.example.com/img/bg.png)' will be transformed to 'background: url(url(http://www.example.com/img/bg.png))'
2013-10-30 v0.2.1 bug fix: when processing relative file path of img url in css stylesheet, forgot to transform "\" to "/" for windows users
2013-10-30 v0.2.0 new feature: Support for minifing js、css when they ar inlined into html.
2013-08-30 v0.1.9 bug fix: stylesheets ended with ">" cannot be inlined
2013-09-02 v0.1.9 add feature: add options.dest to assign a destination path where the source file will be copied
2013-09-02 v0.1.8 add feature: support for <inline> tag