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/**
* Class for adding functionality to backdrop elements
*/
export default class Backdrop {
/**
* Registers all important elements in the backdrop
* @param {string} backdropMenu ID of Backdrop Menu
* @param {string} frontLayer ID of Front Layer
* @param {string} menuButton ID of Show / Hide Menu Button
*/
constructor(backdropMenu, frontLayer, menuButton) {
this.ids = {backdropMenu, frontLayer, menuButton};
}
/**
* Initializes the components from the ids defined in the constructor
*/
initialize() {
this.open = false;
this.backdrop = document.getElementById(this.ids.backdropMenu);
this.frontLayer = document.getElementById(this.ids.frontLayer);
this.menuButton = document.getElementById(this.ids.menuButton);
this.registerEvents();
}
/**
* Registers all neccessary events
*/
registerEvents() {
this.registerButtonEvent();
this.registerFrontLayerEvent();
}
/**
* Registers showing / hiding through menu button
*/
registerButtonEvent() {
this.menuButton.addEventListener('click', () => {
// Change open state
this.open = !this.open;
// Hide / Unhide Backdrop Menu
this.open ? this.backdrop.classList.remove('hidden') :
this.backdrop.classList.add('hidden');
// Set open state for menu button
this.open ? this.menuButton.classList.add('open') :
this.menuButton.classList.remove('open');
});
}
/**
* Registers hiding upon front layer interaction
*/
registerFrontLayerEvent() {
this.frontLayer.addEventListener('click', () => {
if (!this.open) return; // It's already closed
this.open = false;
this.backdrop.classList.add('hidden');
this.menuButton.classList.remove('open');
});
}
}
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