Below is the answer and explanation for the question JavaScript can block DOM construction unless explicitly declared as async.

JavaScript can block DOM construction unless explicitly declared as async.

• False
• True ✅

Correct answer 

True ✅

Explanation

 JavaScript is powerful, it can modify just about every aspect of the page, but it can also block DOM construction and delay page rendering (see also Adding interactivity with JavaScript). To keep JavaScript from delaying page rendering, AMP allows only asynchronous JavaScript.

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