Welcome to the Treehouse Community

The Treehouse Community is a meeting place for developers, designers, and programmers of all backgrounds and skill levels to get support. Collaborate here on code errors or bugs that you need feedback on, or asking for an extra set of eyes on your latest project. Join thousands of Treehouse students and alumni in the community today. (Note: Only Treehouse students can comment or ask questions, but non-students are welcome to browse our conversations.)

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and a supportive community. Start your free trial today.

CSS Framework Basics Prototyping with Bootstrap Adding a Dropdown Menu and Glyphicons

Mark Glissmann
Mark Glissmann
7,225 Points

<script> Position in HTML doc

Is there a particular reason why the <script> element is placed at the bottom of the HTML doc right before the closing </body>? Would the script work the same if it were placed in the <head>?

This is to insure that the page is fully loaded before the script runes. Otherwise you might run in to some problems if the script runes before every thing is loaded. In JavaScript that are a few things you can do to avid doing this. One way is to rune check if the page is fully loaded;. Like this: if (document.readyState === "complete") { do something }. You can also use the jquery.ready to check if your page is loaded. And of course you can just put the script tag at the bottom of the page for an easy fix.

1 Answer

Nejc Vukovic
Nejc Vukovic
Full Stack JavaScript Techdegree Student 36,386 Points

Hi Mark,

The reason is that that way you make sure that the HTML DOM is fully loaded before your script runs. Then you don't need to use $(document).ready in jQuery for example.