ember-cache-primitive-polyfill

Polyfills Ember's cache primitive API.

Provides a low-level primitive for memoizing the result of a function based on autotracking, allowing users to create their own reactive systems that can respond to changes in autotracked state.

Compatibility

• Ember.js v3.13 or above (inert for Ember 3.22+)
• ember-cli-babel v7.22.1 or above
• Ember CLI v3.8 or above
• Node.js v10 or above

Installation

ember install ember-cache-primitive-polyfill

Usage

import { tracked } from '@glimmer/tracking';
import { createCache, getValue } from '@glimmer/tracking/primitives/cache';

let computeCount = 0;

class Person {
  @tracked firstName = 'Jen';
  @tracked lastName = 'Weber';

  #fullName = createCache(() => {
    ++computeCount;
    return `${this.firstName} ${this.lastName}`;
  })

  get fullName() {
    return getValue(this.#fullName);
  }
}

let person = new Person();

console.log(person.fullName); // Jen Weber
console.log(computeCount); // 1;
console.log(person.fullName); // Jen Weber
console.log(computeCount); // 1;

person.firstName = 'Jennifer';

console.log(person.fullName); // Jennifer Weber
console.log(computeCount); // 2;

Contributing

See the Contributing guide for details.

License

This project is licensed under the MIT License.