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JavaScript JavaScript Basics (Retired) Introducing JavaScript Where Does JavaScript Go?

Reza Zandi
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Reza Zandi
Full Stack JavaScript Techdegree Student 1,599 Points
Posted by Reza Zandi
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Reza Zandi
Full Stack JavaScript Techdegree Student 1,599 Points

Why does the JS alerts run first, then html?

So, a number of people have asked this, but basically the two alerts are running before my html loads.

I believe I understand why according to this link https://teamtreehouse.com/community/javascript-prompt-executing-before-documentwrite-statements

Is it that now, browsers handle JS first, then move on to HTML, no matter the order? If so, then what the video is talking about is slightly outdated then, right? :)

2 Answers

Steven Parker
Steven Parker
231,268 Points
Steven Parker
Steven Parker
231,268 Points

You're right, browser behavior has changed and now it's normal for the page rendering to happen only after the script is finished. There's some Teachers Notes comments about this, but not on every page. They'll eventually refresh all the courses the demonstrate the earlier behavior.

But the good news is that you'll soon learn much better techniques for user interaction that isn't subject to this issue and make the page fully responsive. You'll probably never use the more primitive methods again after that.