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154 lines
4.3 KiB
Markdown
154 lines
4.3 KiB
Markdown
# inline-html
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Inline local assets referenced in an HTML document.
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[](https://www.npmjs.com/package/inline-html)
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[](https://travis-ci.org/panosoft/inline-html)
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This library parses HTML, embeds the contents of local assets that are referenced within that HTML, and returns a new inlined HTML string.
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The following HTML elements and CSS data types are inlined:
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- Scripts - The source path is read and inlined.
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- Linked CSS stylesheets - The stylesheet is read and inlined within a `<style>` element. Note that nested `@import`'s are also inlined.
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- Linked LESS stylesheets - The LESS is compiled and the output is inlined within a `<style>` element. Note that `@import`'s are also inlined.
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- Images - The source path is replaced with a datauri.
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- CSS url data types - The reference path is replaced with a datauri. These can be used in linked stylesheets, style elements, and element style attributes.
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Also, `inline-html` calls can be statically evaluated and included in Browserify bundles using the [`html-inlinify`](https://github.com/panosoft/html-inlinify) transform.
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## Usage
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Assuming ...
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- `main.js`
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```js
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var a = 1;
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```
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- `main.less`
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```css
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div { background-image: url('path/to/file'); }
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```
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- `main.css`
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```css
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@font-face { src: url('path/to/file'); }
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```
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Then ...
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```js
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var co = require('co');
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var inline = require('inline-html');
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co(function * () {
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var html = `
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<script src="main.js"></script>
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<link rel="stylesheet" href="main.css"/>
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<link rel="stylesheet/less" href="main.less"/>
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<style> div { background-image: url('path/to/file'); } </style>
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<div style="background-image: url('path/to/file');"></div>
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<img src="path/to/file"/>
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`;
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html = yield inline.html(html);
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console.log(html);
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/**
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<script> var a = 1; </script>
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<style> @font-face { src: url('data:...'); } </style>
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<style> div { background-image: url('data:...'); } </style>
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<style> div { background-image: url('data:...'); } </style>
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<div style="background-image: url('data:...');"></div>
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<img src="data:..."/>
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*/
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});
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```
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## Installation
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```sh
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npm install inline-html
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```
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## API
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- [`inline.html`](#html)
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- [`inline.file`](#file)
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- [`Results`](#results)
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---
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<a name="html"></a>
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### inline.html ( html [, options] )
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Parses an HTML string and embeds referenced local assets into the HTML.
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Returns a `Promise` that is fulfilled with an `html` string or an instance of [`Results`](#results) depending on the value of `options.verbose`.
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__Arguments__
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- `html` - An HTML string to inline.
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- `options`
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- `filename` - The filename used to resolve relative paths. If this option is not provided, relative paths will be resolved relative to the process's current working directory.
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- `less` - An object containing LESS options to pass to the less compiler. Defaults to `{}`.
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- `verbose` - A boolean that determines the promises fulfillment value. Supported values are:
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- `true`: An instance of [`Results`](#results).
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- `false`: An `html` string. (_Default_)
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__Example__
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```js
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co(function * () {
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var html = yield inline.html(`<img src="test.png">`);
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console.log(html); // <img src="data:...">
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});
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```
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---
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<a name="file"></a>
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### inline.file ( filename [, options] )
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Reads an HTML file and embeds referenced local assets into the HTML.
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Returns a `Promise` that is fulfilled with an `html` string or an instance of [`Results`](#results) depending on the value of `options.verbose`.
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__Arguments__
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- `html` - A filename of an HTML file to inline. Relative file paths are resolved relative to the filename's directory.
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- `options`
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- `less` - An object containing LESS options to pass to the less compiler. Defaults to `{}`.
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- `verbose` - A boolean that determines the promises fulfillment value. Supported values are:
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- `true`: An instance of [`Results`](#results).
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- `false`: An `html` string. (_Default_)
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__Example__
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```js
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co(function * () {
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html = yield inline.file(`index.html`);
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console.log(html); // <img src="data:...">
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});
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```
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---
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<a name="results"></a>
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### Results
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The `Promise` returned by these functions is optionally fulfilled with a `results` object that has the following properties:
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- `html` - The inlined html
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- `files` - An array of filenames for the local assets that were inlined.
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