Handlebars is not defined

23,037

Solution 1

You are not loading in Handlebars (or your name-table script). You currently have the following markup:

    <script type='text/javascript' rel='js/handlebars-v4.0.5.js'></script>
    <script type='text/javascript' rel='js/name-table.js'></script>

You should be using the src attribute instead of the rel attribute for script tags.

    <script type='text/javascript' src='js/handlebars-v4.0.5.js'></script>
    <script type='text/javascript' src='js/name-table.js'></script>

The Mozilla documentation does not specify the rel attribute as a valid script tag attribute.

Solution 2

Include this line:

<script src="https://twitter.github.io/typeahead.js/js/handlebars.js"></script>

You are done. Thanks.

23,037

Author by

Steverino

Updated on July 09, 2022

Comments

Steverino almost 2 years
I am new at JS and never tried Handlebars before. I'm trying a very bare-bones example from a tutorial. I have downloaded handlebars-v4.0.5.js from the Handlebars website and included it in my page, as follows, along with a template I precompiled, name-table.js. I'm trying my god damned hardest to complete this tutorial but I can't, because when I run the following code, I get ReferenceError: Handlebars is not defined which I can't for the life of me understand, if the file I downloaded from Handebars' own site is in any way valid.
```
<html>
    <head>
        <meta charset='UTF-8'>
        <title>Test Page!</title>
        <script type='text/javascript'>
            function init() {
                document.getElementById('button').addEventListener('click', buttonClick, false);
            }
            function buttonClick() {
                var injection = Handlebars.templates['name-table'];
                document.getElementById('button').innerHTML = injection;
                console.log('hello, world.');
            }

            window.addEventListener('load', init, false);
        </script>
    </head>
    <body>
        <button id='button'>Button</button>
        <div id='content'></div>

        <script type='text/javascript' rel='js/handlebars-v4.0.5.js'></script>
        <script type='text/javascript' rel='js/name-table.js'></script>
    </body>
</html>
```
Edit: The answer I marked solved the problem. Another error appears in this code, and I want to let anyone reading this know that var injection as defined in this code is a function, not a string as I had thought. This code will work if rel is changed to src as in the answer given, and if we use document.getElementById('button').innerHTML = injection(); (note the parens).