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@shinspiegel/use-bem-css

v0.2.3

Published

A hook to generate BEM styled string to use on classNames for react components

Downloads

8

Readme

@shinspiegel/use-bem-css

A hook to generate BEM styled string to use on classNames for react components

NPM

Install

npm install --save @shinspiegel/use-bem-css

Usage

import React from "react";
import { useBemCss } from "@shinspiegel/use-bem-css";

const App = () => {
  const { button, buttonInput, buttonLabel, buttonSpan } = useBemCss({
    className: "button",
    blocks: ["button"],
    elements: ["label", "input", "span"],
  });

  return (
    <div className={button}>
      <label className={buttonLabel}>
        <span className={buttonSpan}>Label Text</span>
        <button type="button" className={buttonInput}>
          Info
        </button>
      </label>
    </div>
  );
};

Basic Usage

It will generate an object with BEM styles strings to use on the react components as values for classNames.

const { button, buttonInput, buttonLabel, buttonSpan } = useBemCss({
  className: "button",
  blocks: ["button"],
  elements: ["label", "input"],
});

console.log(button); // "button"
console.log(buttonInput); // "button__input"
console.log(buttonLabel); // "button__label"

Usage with modifiers

You can add modifier on the classes. To be active you need to pass a property isActive, otherwise it will not allow. If a modifier does not provide a array of with the affected items it will not generate.

const { button, buttonInput, buttonLabel, buttonSpan } = useBemCss({
  className: "button",
  blocks: ["button"],
  elements: ["label", "input"],
  [{ modifier: "white", isActive: true }]
});

console.log(button); // "button button--white"
console.log(buttonInput); // "button__input button__input--white"
console.log(buttonLabel); // "button__label button__label--white"

Usage with affected modifiers

You can add modifier on the classes. To be active you need to pass a property isActive, otherwise it will not allow. If a modifier does not provide a array of with the affected items it will not generate.

const { button, buttonInput, buttonLabel, buttonSpan } = useBemCss({
  className: "button",
  blocks: ["button"],
  elements: ["label", "input"],
  [{ modifier: "white", isActive: true, affects: ["label"] }]
});

console.log(button); // "button"
console.log(buttonInput); // "button__input"
console.log(buttonLabel); // "button__label button__label--white"

Usage multiple blocks and elements

In some cases you may need to add some extra block level classes, in this cases you just need to add extra items in the block.

const { button, buttonInput, buttonLabel, buttonSpan } = useBemCss({
  className: "button",
  blocks: ["buttonBase", "alternativeButton"],
  elements: ["label", "input"],
  [{ modifier: "white", isActive: true, affects: ["label"] }]
});

console.log(button); // "base-button alternative-button"
console.log(buttonInput); // "base-button__input alternative-button__input"
console.log(buttonLabel); // "base-button__label alternative-button__label base-button__label--white alternative-button__label--white"

License

MIT © ShinSpiegel


This hook is created using create-react-hook.