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does browser download completely include javascript file?

Posted on 2002-05-27
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Last Modified: 2013-11-18
If I put this in a html file:
<script language="javascript" src="file.js">
 Will the browser download the whole .js file? Or it just download the only functions that are called in html file? The matter is that I have a .js file with a lot of functions as a library but not every html page is using all functions. Just need to know if this will waste downloading time. Thanks
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Question by:quanghoc
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third earned 150 total points
ID: 7038003
yes it will download the whole .js file in the user's temporary internet files folder.
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by:hongjun
ID: 7038009
Include a file will download the whole. This includes all variables.


hongjun
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by:third
ID: 7038015
if it's really huge then i guess it's advisable to put the common functions used into one .js file and call this in each of your pages. the other functions should reside to other individual .js file. only the pages that needs this function should reference the .js file.

so for example a page needs the common functions file and the specific functions file you can add two extenal .js file to your page.

<script language="javascript" src="file.js">
<script language="javascript" src="specific.js">
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by:hongjun
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third, good illustration on the effective use of js files.

hongjun
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by:third
ID: 7038024
thanks! ;-)
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by:quanghoc
ID: 7038107
So basically, the whole thing will be downloaded, including "comments" ?? What if the .js file has included another .js file?
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by:hongjun
ID: 7038126
yap
comments as well.

js file include another js file?
how you do that!!!

hongjun
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by:third
ID: 7038174
add info:

.js files cannot include another .js file. if you want to include two separate .js files on the web page, do what i have illustrated above.

thanks for the A! ;-)
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by:hongjun
ID: 7038329
well deserved!
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