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Home/ Questions/Q 7825307
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Editorial Team
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Editorial Team
Asked: June 2, 20262026-06-02T08:55:39+00:00 2026-06-02T08:55:39+00:00

I have dowloaded backbone.js from http://documentcloud.github.com/backbone/ , included that file inside script tag and

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I have dowloaded backbone.js from http://documentcloud.github.com/backbone/, included that file inside script tag and create view in onReady function like http://documentcloud.github.com/backbone/#View
but I always get message ** _ is undefined _.extend(Model.prototype, Events, {**
but when I look in file _extend is there and path is 100% ok. Did anyone have same behavior ?

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  1. Editorial Team
    Editorial Team
    2026-06-02T08:55:40+00:00Added an answer on June 2, 2026 at 8:55 am

    Backbone is dependent on Underscore.
    Include it first.

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