Challenges
Most chapters in this book end with at least one challenge. Challenges are opportunities to review what you have learned and take your work in the chapter one step further. We recommend that you tackle as many of them as you can to cement your knowledge and move from learning JavaScript development from us to doing JavaScript development on your own.
Challenges come in three levels of difficulty:
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Bronze challenges typically ask you to do something very similar to what you did in the chapter. These challenges reinforce what you learned in the chapter and force you to type in similar code without having it laid out in front of you. Practice makes perfect.
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Silver challenges require you to do more digging and more thinking. ...
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