Evgenii Evgenii - 5 months ago 30
HTML Question

How to inject content of CSS file into HTML in Gulp?

I need to insert the content of a stylesheet into the

<head>
of an HTML page. Is there a gulp plugin for that?

Before (what I have):

<head>
<link href="style.css" rel="stylesheet" type="text/css" />
</head>


After (what I want):

<head>
<style>
p { color: pink; }
</style>
</head>


Note that I do not need to inline CSS into the elements, but just put the contents of CSS in the
<head>
.

Answer

You could easily use gulp-replace, like so:

var gulp = require('gulp'),
    replace = require('gulp-replace'),
    fs = require('fs');

// in your task
return gulp.src(...)
  .pipe(replace(/<link href="style.css"[^>]*>/, function(s) {
      var style = fs.readFileSync('style.css', 'utf8');
      return '<style>\n' + style + '\n</style>';
  }))
  .pipe(gulp.dest(...));

You can also easily modify the replacement RegEx to work with different files, too.

return gulp.src(...)
  .pipe(replace(/<link href="([^\.]\.css)"[^>]*>/g, function(s, filename) {
      var style = fs.readFileSync(filename, 'utf8');
      return '<style>\n' + style + '\n</style>';
  }))
  .pipe(gulp.dest(...));