ember-render-helpers/dist/helpers/will-destroy-helper.js

Helpers that complement @ember/render-modifiers

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

/**
 * This helper is activated immediately before the helper is un-rendered
 * (removed from the DOM). It does not run during or after initial render, or
 * when its arguments are updated.
 */
class WillDestroyHelperHelper extends Helper {
  callback;
  named;
  positional;
  compute(positional, named) {
    const [callback, ...positionalParameters] = positional;
    assert(
    // eslint-disable-next-line @typescript-eslint/restrict-template-expressions
    `\`{{will-destroy-helper}}\` expects a function as the first parameter. You provided: ${callback}`, typeof callback === 'function');
    this.callback = callback;
    this.named = named;
    this.positional = positionalParameters;
  }
  willDestroy() {
    if (this.callback && this.positional && this.named) {
      this.callback(this.positional, this.named);
    }
    super.willDestroy();
  }
}

export { WillDestroyHelperHelper as default };
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