Special thanks to the author of the idea akopyl.

Installation

Attention! This library works with the APIs provided by node.js .

npm i css2html

yarn add css2html

import { CssToHtml } from 'css2html';

let result = new CssToHtml({ css: 'div{}' });

console.log(result.outputHTML);

What is this?

It converts this:

section#some-id {
  --text: 'This is text!';
  --attr-title: 'Title';
  background: red;
  color: aliceblue;
}
section#some-id header[data-attribute='v'] {
  --text: 'This is the header text';
  color: blue;
}
section#some-id span {
  --text: 'Text of span';
  --text-after: 'Text after';
  color: peru;
}

To this:

<section id="some-id" title="Title">
  This is text!
  <header data-attribute="v">This is the header text</header>
  <span> Text of span </span>Text after
</section>

How to use this?

Elements

You can create an element via selector:

div.classname#id[attr-1][attr-2='v'] {
  /* None of the parts of a selector are mandatory */
  /* But at least something needs to be left */
}

<!-- Result -->
<div id="id" class="classname" attr-1 attr-2="v"></div>

Nesting is supported:

div {
}
div span {
}

<div>
  <span></span>
</div>

If you want to add styles but not add elements (that is, so that some selectors are ignored), add one of the following to the selector:

• Pseudo-class
• Pseudo-element
• One of these selectors: *, +, >, ||, |, ~
• Or wrap it in an @at-rule

Example - these selectors will be ignored:

> div.classname#id[attr-1][attr-2='v'] {
}
div::before {
  /* Yes, and this one too */
}
div:not(:has(span)) {
  /* And this one too! */
}
@container (width > 1440px) {
  div[data-a='This element will be ignored too'] {
  }
}

Text and attributes

Attributes can be set via a selector (it can be useful for styling), or you can use a custom property:

/* In a selector */
a[title='Title!'] {
  /* Specific attribute */
  --attr-href: './index.html';
  --data-attribute: 'Value';

  /* And massively! */
  --attrs: 'target="_self" rel="noopener"';
}

<a
  title="Title!"
  data-attribute="Value"
  href="./index.html"
  target="_self"
  rel="noopener"
>
</a>

You can also add text to the tag via --text property:

div {
  --text: 'The battle continues again';
}

<div>The battle continues again</div>

In order to insert a tag between the text, you will definitely need special properties that allow you to enter text before and after the tag: --text-before and --text-after

div {
  --text: 'The text inside the div';
}
div span {
  --text: ' The text inside span';
  --text-before: '| before';
  --text-after: ' after';
}

<div>
  The text inside the div | before<span> The text inside span</span> after
</div>

API

The very minimum to run looks like this:

// This code outputs to the terminal/console the result of processing the simplest CSS from the single tag.
import { CssToHtml } from 'css2html';

let result = new CssToHtml({ css: 'div{}' });

console.log(result.outputHTML);

Writing to a file

To write in a file, add the write parameter: (Attention! The entire file will be overwritten)

new CssToHtml({
  ...,
  write: {
    in: "your_path_to_html_file",
  },
})

Overwriting a part of a file

Using the after and/or before parameters, you will not overwrite the entire file, but specify the area to be overwritten. You can omit one of these parameters or not specify them at all.

Without after and before parameters:

new CssToHtml({
  ...,
  write: {
    in: "your_path_to_html_file",
  },
})

<some-html-content>
  <div>Your content from CSS</div>
</some-html-content>

<!-- to... -->

<div>Your content from CSS</div>

With after and before parameters:

new CssToHtml({
  ...,
  write: {
    ...,
    after: '<some-html-content>',
    before: '</some-html-content>',
  },
})

<some-html-content>
  <div>Your content from CSS</div>
</some-html-content>

<!-- Without changes -->

<some-html-content>
  <div>Your content from CSS</div>
</some-html-content>

Formatting

Before giving you html, it is formatted by the html-format library. You can either enable or disable formatting:

new CssToHtml({
  format: true, // default value
});

If you find a bug, please create an issue here.

If this project was useful to you, you can give it a ★ in repository.