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critical-injector

0.2.1 • Public • Published

Critical Injector

Injects CSS or JS files contents into HTML file in marked places. Actual detection of critical path CSS should be done by other means. On small pages it can me done manually.

You can keep Your code in separate files, process them by other packages (compile, minify) and finally inject their source.

Install

Install with npm

npm install --save critical-injector

Usage

const criticalInjector = require('critical-injector');
 
var newContent = criticalInjector('src/file.html', {
    basePath: '../htdocs',
});

An example of this in completed form can be seen below:

<html>
<head>
    <!-- injector:css foo bar="baz" -->
    <link rel="stylesheet" href="page-critical-1.css">
    <link rel="stylesheet" href="page-critical-2.css">
    <!-- endinjector -->
 
    <link rel="preload" href="page-1.css" as="style" onload="this.rel='stylesheet'">
</head>
<body>
    <!-- injector:js defer -->
    <script src="page-critical-1.js"></script> 
    <script src="page-critical-2.js"></script> 
    <!-- endinjector -->
 
    <script src="page-1.js" defer></script> 
</body>
</html>

The resulting HTML would be:

<html>
<head>
    <style foo bar="baz">/* Merged contents of all CSS files */</style> 
 
    <link rel="preload" href="page-1.css" as="style" onload="this.rel='stylesheet'">
</head>
<body>
    <script defer>/* Merged contents of all JS files */</script> 
 
    <script src="page-1.js" defer></script> 
</body>
</html>

API

criticalInjector(src, options)

src

Type: String Default: none

File pathname or HTML content.

Options

options.basePath

Type: String Default: none

Extracted pathnames from [src] or [href] attributes will be appended to basePath.

options.isPath

Type: Boolean Default: true

Specify if first argument is a pathname or HTML content.

Readme

Keywords

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Package Sidebar

Install

npm i critical-injector

Repository

github.com/matpoppl/critical-injector

Homepage

github.com/matpoppl/critical-injector#readme

Weekly Downloads

2

Version

0.2.1

License

MIT

Unpacked Size

6.69 kB

Total Files

5

Last publish

Collaborators

  • matpoppl
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