From c6930446fedd5fde1f02bff7f5de90bfedd000cc Mon Sep 17 00:00:00 2001
From: Hongbo LU <gitawego@gmail.com>
Date: Tue, 17 Mar 2015 17:04:36 +0100
Subject: [PATCH] more template string validation

---
 js/tmpl.js | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/js/tmpl.js b/js/tmpl.js
index 9380053..a57cd01 100644
--- a/js/tmpl.js
+++ b/js/tmpl.js
@@ -18,6 +18,9 @@
 (function ($) {
     "use strict";
     var tmpl = function (str, data) {
+        if(typeof(str) !== 'string'){
+            throw new Error('str must be a string');
+        }
         var f = !/[^\w\-\.:]/.test(str) ? tmpl.cache[str] = tmpl.cache[str] ||
                 tmpl(tmpl.load(str)) :
                     new Function(
@@ -32,7 +35,11 @@
     };
     tmpl.cache = {};
     tmpl.load = function (id) {
-        return document.getElementById(id).innerHTML;
+        var node =  document.getElementById(id);
+        if(!node){
+            throw new Error('DOM Node '+id+' not found');
+        }
+        return node.innerHTML;
     };
     tmpl.regexp = /([\s'\\])(?!(?:[^{]|\{(?!%))*%\})|(?:\{%(=|#)([\s\S]+?)%\})|(\{%)|(%\})/g;
     tmpl.func = function (s, p1, p2, p3, p4, p5) {