#388 throw error if no root element

MithrilJS · Dec 31, 2014 · d4bfee4 · d4bfee4
1 parent e9c892c
commit d4bfee4
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/mithril.js b/mithril.js
@@ -478,6 +478,7 @@ var m = (function app(window, undefined) {
 	var roots = [], modules = [], controllers = [], lastRedrawId = null, lastRedrawCallTime = 0, computePostRedrawHook = null, prevented = false, topModule;
 	var FRAME_BUDGET = 16; //60 frames per second = 1 call per 16 ms
 	m.module = function(root, module) {
+		if (!root) throw new Error("Please ensure the DOM element exists before rendering a template into it.");
 		var index = roots.indexOf(root);
 		if (index < 0) index = roots.length;
 		var isPrevented = false;