Toggle Group

A map like data structure to handle multiple toggle(-able) elements

What's ToggleGroup and how is useful

• ToggleGroup is a simple class that encapsulate a collection key value pairs, yet value is always boolean, toggleable.

• It provides interface to access value of particular key, change it and perform bulk operations like closeAll which sets all internal pairs to be value false.

• It can be useful in many scenarios, for example

  • You want to build a Tab switch structure - it does exactly that, you could initate it with unique tab keys and then utilize dropOpen method to switch (set to true) on one of them, while keeping (or dropping) rest to false.
  • You want to implement expand/collapse structure - yet again it does exactly that. It allows you to switch on (termed open) one or more keys, and close likewise. Also you could collapse all by calling closeAll method and expand all by calling openAll method.

I wrote this structure and found it useful in front-end Angular application. I use this to keep my views binded togathered and yet easily switched, based on state of ToggleGroup object. Examples are shared at end.

Installation

npm install toggle-group

Basic Usage

Importing

NodeJS

  const { ToggleGroup, Toggle } = require('toggle-group');

Typescript

  import { ToggleGroup, Toggle } from 'toggle-group';

Creating object

  const simple = new ToggleGroup(); // that's all

  const tg = new ToggleGroup(['good', 'better'], false);
  tg.createToggle('best', true);

  console.log(tg);
  /* output
    ToggleGroup {
      _toggles: [
        { key: 'good', value: false },
        { key: 'better', value: false },
        { key: 'best', value: true }
      ]
    }
  */
 
  const tg1 = new ToggleGroup(
    [
      { key: 'good', value: true }, // maybe of type Toggle/IToggle
      Toggle.from({ key: 'good', value: false }), // Toggle instance created from IToggle
      new Toggle('good', false), // may include Toggle instances,
      'str-key-1',
      'str-key-2',
    ],

    // string key's get value passed in 2nd param, or fallback to `false`
    true
  );

  console.log(tg1.getValue('str-key-1'));
  /* output
    true 
  */

Properties and methods (operations)

Please refer to docs here.

Demo

A simple live demo is available at Stackblitz here.

Contribution

Kind of contrbution like improving code, fixing bugs, improving docs is highly appreciated.