Allow compilation of empty string

Fixes #461

2 files changed, 4 insertions, 4 deletions

diff --git a/dist/handlebars.js b/dist/handlebars.js
index d7f140e..cce5473 100644
--- a/dist/handlebars.js
+++ b/dist/handlebars.js
@@ -2079,7 +2079,7 @@ JavaScriptCompiler.isValidJavaScriptVariableName = function(name) {
 };
 
 Handlebars.precompile = function(input, options) {
-  if (!input || (typeof input !== 'string' && input.constructor !== Handlebars.AST.ProgramNode)) {
+  if (input == null || (typeof input !== 'string' && input.constructor !== Handlebars.AST.ProgramNode)) {
     throw new Handlebars.Exception("You must pass a string or Handlebars AST to Handlebars.precompile. You passed " + input);
   }
 
@@ -2093,7 +2093,7 @@ Handlebars.precompile = function(input, options) {
 };
 
 Handlebars.compile = function(input, options) {
-  if (!input || (typeof input !== 'string' && input.constructor !== Handlebars.AST.ProgramNode)) {
+  if (input == null || (typeof input !== 'string' && input.constructor !== Handlebars.AST.ProgramNode)) {
     throw new Handlebars.Exception("You must pass a string or Handlebars AST to Handlebars.compile. You passed " + input);
   }
 
diff --git a/lib/handlebars/compiler/compiler.js b/lib/handlebars/compiler/compiler.js
index b028076..b31d92b 100644
--- a/lib/handlebars/compiler/compiler.js
+++ b/lib/handlebars/compiler/compiler.js
@@ -1238,7 +1238,7 @@ JavaScriptCompiler.isValidJavaScriptVariableName = function(name) {
 };
 
 Handlebars.precompile = function(input, options) {
-  if (!input || (typeof input !== 'string' && input.constructor !== Handlebars.AST.ProgramNode)) {
+  if (input == null || (typeof input !== 'string' && input.constructor !== Handlebars.AST.ProgramNode)) {
     throw new Handlebars.Exception("You must pass a string or Handlebars AST to Handlebars.precompile. You passed " + input);
   }
 
@@ -1252,7 +1252,7 @@ Handlebars.precompile = function(input, options) {
 };
 
 Handlebars.compile = function(input, options) {
-  if (!input || (typeof input !== 'string' && input.constructor !== Handlebars.AST.ProgramNode)) {
+  if (input == null || (typeof input !== 'string' && input.constructor !== Handlebars.AST.ProgramNode)) {
     throw new Handlebars.Exception("You must pass a string or Handlebars AST to Handlebars.compile. You passed " + input);
   }