CODEWITHSUNDEEP
underscore.jsrequirejs
wcolbert
wcolbert

Reputation: 2040

Underscore.js Uncaught TypeError: Cannot call method 'template' of null

require.config({
     paths: {
         jquery: 'libs/jquery',
         underscore: 'libs/underscore',
    }
});
define([
    'jquery',
    'underscore',
    ], function($,_){
        var test = _.template("hello: <%= name %>",{name:"warren"});

});

Given the above code using requirejs to load jquery and underscore, why am I getting this error...

Uncaught TypeError: Cannot call method 'template' of null

All JS seems to be loading... The error points to the _.template line. This is driving me crazy...

Upvotes: 2

Views: 2673

Answers (1)

Feugy
Feugy

Reputation: 1918

Are you sure you've bundled the underscore library to be usable with requireJS ?

When you write :

define([
    'jquery',
    'underscore',
  ], function($,_){
      var test = _.template("hello: <%= name %>",{name:"warren"});

});

The '_' variable (second argument of the callback function) is assigned with the export of the underscore library (second dependency specified).

I guess you used the original version of underscore, which is not package for requireJS. In your underscore.js file, add the following line at the begining:

define(function () {

and this line at the end:

return _;});

Thus, the export are well configured.

Another possible solution is to use the global '_' variable: all you need to do is to remove the second argument of your callback.

define([
    'jquery',
    'underscore',
  ], function(){
      var test = _.template("hello: <%= name %>",{name:"warren"});

});

From there, your browser will use the '_' global variable, which is defined in underscore, and which is set when the callback is called.

Same behaviour is expected with jQuery.

Upvotes: 7

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