cra-json-sass

Description

I created this package as a tool for myself and is under development.

Creates .scss files with variables from a .json

Why? you can share variables between scss and js without altering bundlers (webpack) configurations, I create this to no be forced to eject Create React App

This will translate even very nested arrays and objects;

It is also useful for testing or creating full application selectors maps.

Instalation

npm

npm i -D cra-json-sass

yarn

yarn add -D cra-json-sass

Config

You can config the default values by creating a config-cra-json-sass.json file in your package root folder:

This are the default values

{
  "folder": "src",
  "fileExtension": ".scss.json"
}

Usage

You have two binaries that will look into config.folder for files with config.fileExtension and generate json files

• yarn cra-json-sass-build: write all the files and stop.
• yarn cra-json-sass-watch: write all the files and keep waiting for file changes.

EXAMPLES

Source shared-js-scss.scss.json

// tests/basicSample.scss.json

{
  "block": "Button",
  "text": "Button__text",
  "icon": "Button__icon",
  "primary": "Button--primary",
  "secondary": "Button--secondary",
  "isActive": "is-active",
  "animationSpeed" : 0.2,
  "backgroundColor": "green",
  "nested": {
    "color": "red",
    "re-nested": {
      "last-value": "orange"
    }
  },
  "array": [
    "blue",
    {
      "background-color": "red",
      "font-size": "1rem"
    }
  ]
}

Generates shared-js-scss.scss

// tests/basicSample.scss

$block: Button;
$text: Button__text;
$icon: Button__icon;
$primary: Button--primary;
$secondary: Button--secondary;
$isActive: is-active;
$animationSpeed: 0.2;
$backgroundColor: green;
$nested: (
  color: red,
  re-nested: (
   last-value: orange
  )
 );
$array: (
  blue,
  (
   background-color: red,
   font-size: 1rem
  )
 );

usage in sample.js

import sharedWithScss from `./shared.scss.json` // simple json
import `sample-style.scss` // import the styles, not as a module

sharedWithScss.block.Button // "Button"
sharedWithScss.text // "Button__text"
setTimeOut(
  () => console.log('the same time animation takes'),
  sharedWithScss.animationSpeed * 1000)

usage in sample-style.scss

@import "./shared"; //you don't need any extension

.#{$block} {
  background-color: $backgroundColor;
  transition: all #{$animationSpeed}s;
  color: map-get($nested, color); // red

  &.#{$isActive} { // .Button.is-active
    color: map-get(map-get($nested, re-nested),last-value) // orange
  }
.#{$text} {
  display: flex;
}

Testing component

import selectors from './shared.scss.json'

// ... mount component with enzyme
const component = mount(<SampleComponent>Text</SampleComponent>)

it(
  `Should Have ${selectors.block} and ${selectors.primary}`,
  () => {
    expect(component.hasClass(selectors.block)).toEqual(true)
    expect(component.hasClass(selectors.primary)).toEqual(true)
  }
  );

  const textSelector = `.${selectors.text}`
it(
  `Should Have a inner element ${textSelector}`,
  () => {
    const innerElement = component.find(textSelector)

    expect(innerElement).toHaveLength(1)
  }
  );