/*
* mburger webcomponent v1.3.3
* mmenujs.com/mburger
*
* Copyright (c) Fred Heusschen
* www.frebsite.nl
*
* License: CC-BY-4.0
* http://creativecommons.org/licenses/by/4.0/
*/
export const mBurger = document.createElement('template');
mBurger.innerHTML = `
`;
customElements.define('m-burger', class extends HTMLElement {
constructor() {
super();
/** The menu node. */
this.menuNode = null;
/** API for the menu. */
this.menuApi = null;
// Attach shadow DOM
var content = mBurger.content.cloneNode(true);
this.attachShadow({ mode: 'open' }).appendChild(content);
}
static get observedAttributes() {
return ['menu'];
}
attributeChangedCallback(name, oldValue, newValue) {
if (name == 'menu') {
// Initiate the new menu.
this.initMenu(newValue);
}
}
connectedCallback() {
// Open the menu when clicking the hamburger.
this.addEventListener('click', evnt => {
// If there is no API for a menu available (the menu isn't yet initiated),
// try to initiate the menu.
if (!this.menuApi) {
this.initMenu();
}
// If there is an API for a menu available,
// open the menu.
if (this.menuApi && this.menuApi.open) {
this.menuApi.open();
}
});
}
/**
* Set the menu node and API.
* @param {string} [id] The ID-attribute for the menu node.
*/
initMenu(id) {
this.menuNode = null;
this.menuApi = null;
if (!id) {
id = this.getAttribute('menu');
}
if (id) {
this.menuNode = document.getElementById(id);
}
if (this.menuNode) {
this.menuApi =
this.menuNode['mmApi'] || this.menuNode['mmenu'] || null;
}
// Change the hamburger state when opening and closing the menu.
if (this.menuApi) {
this.menuApi.bind('open:after', () => {
this.setAttribute('state', 'cross');
});
this.menuApi.bind('close:after', () => {
this.removeAttribute('state');
});
}
}
});