83 lines
2.5 KiB
JavaScript
83 lines
2.5 KiB
JavaScript
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/**
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* @file
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* System behaviors.
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*/
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(function ($, Drupal, drupalSettings) {
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// Cache IDs in an array for ease of use.
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const ids = [];
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/**
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* Attaches field copy behavior from input fields to other input fields.
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*
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* When a field is filled out, apply its value to other fields that will
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* likely use the same value. In the installer this is used to populate the
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* administrator email address with the same value as the site email address.
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*
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* @type {Drupal~behavior}
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*
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* @prop {Drupal~behaviorAttach} attach
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* Attaches the field copy behavior to an input field.
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*/
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Drupal.behaviors.copyFieldValue = {
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attach(context) {
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// List of fields IDs on which to bind the event listener.
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// Create an array of IDs to use with jQuery.
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Object.keys(drupalSettings.copyFieldValue || {}).forEach((element) => {
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ids.push(element);
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});
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if (ids.length) {
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// Listen to value:copy events on all dependent fields.
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// We have to use body and not document because of the way jQuery events
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// bubble up the DOM tree.
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$(once('copy-field-values', 'body')).on(
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'value:copy',
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this.valueTargetCopyHandler,
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);
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// Listen on all source elements.
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$(once('copy-field-values', `#${ids.join(', #')}`)).on(
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'blur',
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this.valueSourceBlurHandler,
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);
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}
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},
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detach(context, settings, trigger) {
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if (trigger === 'unload' && ids.length) {
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$(once.remove('copy-field-values', 'body')).off('value:copy');
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$(once.remove('copy-field-values', `#${ids.join(', #')}`)).off('blur');
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}
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},
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/**
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* Event handler that fill the target element with the specified value.
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*
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* @param {jQuery.Event} e
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* Event object.
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* @param {string} value
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* Custom value from jQuery trigger.
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*/
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valueTargetCopyHandler(e, value) {
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const { target } = e;
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if (target.value === '') {
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target.value = value;
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}
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},
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/**
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* Handler for a Blur event on a source field.
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*
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* This event handler will trigger a 'value:copy' event on all dependent
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* fields.
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*
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* @param {jQuery.Event} e
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* The event triggered.
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*/
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valueSourceBlurHandler(e) {
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const { value } = e.target;
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const targetIds = drupalSettings.copyFieldValue[e.target.id];
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$(`#${targetIds.join(', #')}`).trigger('value:copy', value);
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},
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};
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})(jQuery, Drupal, drupalSettings);
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