TypeError Applying Precompiled Handlebars Templates With A Context

Pardon the noob question but I simply can't get precompiled Handlebars templates to do anything but barf out TypeError: 'undefined' is not a function (evaluating 'templateSpec.cal

Solution 1:

Be sure to match the versions of the Handlebars server and client packages. A way to check the version of the compiled template is the following:

handlebars a_template_of_yours.handlebars | grep "compilerInfo"

It should output something like this:

this.compilerInfo = [4,'>= 1.0.0'];

The first value is the Compiler Revision, which should match the output of the following code on your browser:

Handlebars.COMPILER_REVISION

If you used npm to download your Handlebars compiler, specify the version which you need. Here is an example for handlebars.runtime-v1.3.0.js:

npm install handlebars@1.3.0 -g

Solution 2:

The problem for me is that currently (June 2014), the 2.0 release on GitHub is marked alpha https://github.com/wycats/handlebars.js/releases.

If I install handlebars via bower, it selects the latest stable release. v1.3.0.

npm install handlebars, however, installs the ~2.0.0-alpha.4 version.

Answer : update the version in bower.json to ~2.0.*, and run bower update.