Line 84 can throw unhandled TypeError

[ArsBarsj]

document.querySelector returns null if it didn't find element. Line 84 can throw unhandled TypeError

sticky-sidebar-v2/src/sticky-sidebar.js

Lines 75 to 84 in 8ec45e3

	constructor(sidebar, options = {}){
	this.options = StickySidebar.extend(DEFAULTS, options);
	// Sidebar element query if there's no one, throw error.
	this.sidebar = ('string' === typeof sidebar ) ? document.querySelector(sidebar) : sidebar;
	if( 'undefined' === typeof this.sidebar )
	throw new Error("There is no specific sidebar element.");
	this.sidebarInner = false;
	this.container = this.sidebar.parentElement;