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The "Using the extend() Method" Lesson is part of the full, Building Web Apps (with React, Ampersand, ES6 and Webpack) course featured in this preview video. Here's what you'd learn in this lesson:
Henrik spends a few minutes explaining the extend method he’s using in each module. This method takes an Object as a parameter and appends the properties of this object to the object in which it is called. Henrik also answers a few questions about the behavior of collections and how changes are triggered.