src/js/button.js
/**
* @file button.js
*/
import ClickableComponent from './clickable-component.js';
import Component from './component';
import * as Events from './utils/events.js';
import * as Fn from './utils/fn.js';
import log from './utils/log.js';
import document from 'global/document';
import assign from 'object.assign';
/**
* Base class for all buttons
*
* @param {Object} player Main Player
* @param {Object=} options Object of option names and values
* @extends ClickableComponent
* @class Button
*/
class Button extends ClickableComponent {
constructor(player, options) {
super(player, options);
}
/**
* Create the component's DOM element
*
* @param {String=} type Element's node type. e.g. 'div'
* @param {Object=} props An object of properties that should be set on the element
* @param {Object=} attributes An object of attributes that should be set on the element
* @return {Element}
* @method createEl
*/
createEl(tag='button', props={}, attributes={}) {
props = assign({
className: this.buildCSSClass()
}, props);
if (tag !== 'button') {
log.warn(`Creating a Button with an HTML element of ${tag} is deprecated; use ClickableComponent instead.`);
// Add properties for clickable element which is not a native HTML button
props = assign({
tabIndex: 0
}, props);
// Add ARIA attributes for clickable element which is not a native HTML button
attributes = assign({
role: 'button'
}, attributes);
}
// Add attributes for button element
attributes = assign({
type: 'button', // Necessary since the default button type is "submit"
'aria-live': 'polite' // let the screen reader user know that the text of the button may change
}, attributes);
let el = Component.prototype.createEl.call(this, tag, props, attributes);
this.createControlTextEl(el);
return el;
}
/**
* Adds a child component inside this button
*
* @param {String|Component} child The class name or instance of a child to add
* @param {Object=} options Options, including options to be passed to children of the child.
* @return {Component} The child component (created by this process if a string was used)
* @deprecated
* @method addChild
*/
addChild(child, options={}) {
let className = this.constructor.name;
log.warn(`Adding an actionable (user controllable) child to a Button (${className}) is not supported; use a ClickableComponent instead.`);
// Avoid the error message generated by ClickableComponent's addChild method
return Component.prototype.addChild.call(this, child, options);
}
/**
* Handle KeyPress (document level) - Extend with specific functionality for button
*
* @method handleKeyPress
*/
handleKeyPress(event) {
// Ignore Space (32) or Enter (13) key operation, which is handled by the browser for a button.
if (event.which === 32 || event.which === 13) {
} else {
super.handleKeyPress(event); // Pass keypress handling up for unsupported keys
}
}
}
Component.registerComponent('Button', Button);
export default Button;