style-to-object

What is style-to-object?

The style-to-object npm package is used to convert inline CSS style strings into JavaScript objects. This can be particularly useful when working with React or other JavaScript frameworks that expect style information to be provided as objects rather than strings.

What are style-to-object's main functionalities?

Convert CSS string to JavaScript object

This feature allows you to convert a CSS style string into a JavaScript object. The keys of the object are camelCased versions of the CSS property names, and the values are the corresponding CSS values as strings.

const styleToObject = require('style-to-object');
const styleString = 'color: red; font-size: 14px;';
const styleObject = styleToObject(styleString);
console.log(styleObject);

Other packages similar to style-to-object

css-to-object

Similar to style-to-object, css-to-object converts CSS strings into JavaScript objects. The main difference may lie in the API, performance, or additional features provided by the package.

parse-css

This package is designed to parse CSS strings and may offer more comprehensive parsing capabilities, including selectors and media queries, which goes beyond the inline style conversion provided by style-to-object.

style-parser

style-parser is another package that can parse inline style strings into objects. It might offer different parsing options or handle edge cases differently compared to style-to-object.

README

style-to-object

Parses inline style to object:

var parse = require('style-to-object');
parse('color: #C0FFEE; background: #BADA55;');

Output:

{ color: '#C0FFEE', background: '#BADA55' }

JSFiddle | Replit | Examples

Installation

NPM:

npm install style-to-object --save

Yarn:

yarn add style-to-object

CDN:

<script src="https://unpkg.com/style-to-object@latest/dist/style-to-object.min.js"></script>
<script>
  window.StyleToObject(/* string */);
</script>

Usage

Import the module:

// CommonJS
const parse = require('style-to-object');

// ES Modules
import parse from 'style-to-object';

Parse single declaration:

parse('line-height: 42');

Output:

{ 'line-height': '42' }

Parse multiple declarations:

parse(`
  border-color: #ACE;
  z-index: 1337;
`);

Output:

{ 'border-color': '#ACE', 'z-index': '1337' }

Parse unknown declarations:

parse('answer: 42;');

Output:

{ 'answer': '42' }

Invalid declarations/arguments:

parse(`
  top: ;
  right: 1em;
`); // { right: '1em' }

parse();        // null
parse(null);    // null
parse(1);       // null
parse(true);    // null
parse('top:');  // null
parse(':12px'); // null
parse(':');     // null
parse(';');     // null

parse('top'); // throws Error
parse('/*');  // throws Error

Iterator

If the 2nd argument is a function, then the parser will return null:

parse('color: #f00', function() {}); // null

But the function will iterate through each declaration:

parse('color: #f00', function(name, value, declaration) {
  console.log(name);        // 'color'
  console.log(value);       // '#f00'
  console.log(declaration); // { type: 'declaration', property: 'color', value: '#f00' }
});

This makes it easy to customize the output:

const style = `
  color: red;
  background: blue;
`;
const output = [];

function iterator(name, value) {
  output.push([name, value]);
}

parse(style, iterator);
console.log(output); // [['color', 'red'], ['background', 'blue']]

Testing

Run tests:

npm test

Run tests in watch mode:

npm run test:watch

Run tests with coverage:

npm run test:coverage

Lint files:

npm run lint

Fix lint errors:

npm run lint:fix

Test TypeScript declaration file for style and correctness:

npm run lint:dts

Release

Release and publish are automated by Release Please.

Special Thanks

• inline-style-parser
• Contributors

License

MIT

Changelog

0.4.0 (2022-12-03)

Features

• add ESM support (2e7d959)