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https://github.com/Choices-js/Choices.git
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61 lines
1.6 KiB
TypeScript
61 lines
1.6 KiB
TypeScript
import { ClassNames } from '../interfaces/class-names';
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import { Item } from '../interfaces/item';
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import WrappedElement from './wrapped-element';
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export default class WrappedSelect extends WrappedElement {
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element: HTMLSelectElement;
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classNames: ClassNames;
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template: (data: object) => HTMLOptionElement;
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constructor({
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element,
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classNames,
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template,
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}: {
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element: HTMLSelectElement;
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classNames: ClassNames;
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template: (data: object) => HTMLOptionElement;
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}) {
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super({ element, classNames });
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this.template = template;
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}
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get placeholderOption(): HTMLOptionElement | null {
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return (
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this.element.querySelector('option[value=""]') ||
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// Backward compatibility layer for the non-standard placeholder attribute supported in older versions.
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this.element.querySelector('option[placeholder]')
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);
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}
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get optionGroups(): Element[] {
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return Array.from(this.element.getElementsByTagName('OPTGROUP'));
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}
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get options(): Item[] | HTMLOptionElement[] {
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return Array.from(this.element.options);
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}
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set options(options: Item[] | HTMLOptionElement[]) {
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const fragment = document.createDocumentFragment();
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const addOptionToFragment = (data): void => {
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// Create a standard select option
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const option = this.template(data);
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// Append it to fragment
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fragment.appendChild(option);
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};
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// Add each list item to list
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options.forEach((optionData) => addOptionToFragment(optionData));
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this.appendDocFragment(fragment);
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}
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appendDocFragment(fragment: DocumentFragment): void {
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this.element.innerHTML = '';
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this.element.appendChild(fragment);
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}
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}
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