ember-render-helpers/dist/helpers/did-update-helper.js

Helpers that complement @ember/render-modifiers

import Helper from '@ember/component/helper';
import { assert } from '@ember/debug';

/**
 * This helper is activated only on _updates_ to it's arguments (both positional
 * and named). It does not run during or after initial render, or before it is
 * un-rendered (removed from the DOM).
 */
class DidUpdateHelperHelper extends Helper {
  didRun = false;
  compute(positional, named) {
    const [callback, ...positionalParameters] = positional;
    assert(
    // eslint-disable-next-line @typescript-eslint/restrict-template-expressions
    `\`{{did-update-helper}}\` expects a callback function as the first parameter. You provided: ${callback}`, typeof callback === 'function');
    if (!this.didRun) {
      this.didRun = true;

      // Consume individual properties to entangle tracking.
      // https://github.com/emberjs/ember.js/issues/19277
      positional.forEach(() => {});
      Object.values(named);
      return;
    }
    callback(positionalParameters, named);
  }
}

export { DidUpdateHelperHelper as default };
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