Does the <script> tag position in HTML affects performance of the webpage?
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Rahul Joshi
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Published on 2010-12-09T09:52:36Z
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2010/12/31
15:54 UTC
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If the script tag is above or below the body in a HTML page, does it matter for the performance of a website?
And what if used in between like this:
<body>
..blah..blah..
<script language="JavaScript" src="JS_File_100_KiloBytes">
function f1() {
.. some logic reqd. for manipulating contents in a webpage
}
</script>
... some text here too ...
</body>
Or is this better?:
<script language="JavaScript" src="JS_File_100_KiloBytes">
function f1() {
.. some logic reqd. for manipulating contents in a webpage
}
</script>
<body>
..blah..blah..
..call above functions on some events like onclick,onfocus,etc..
</body>
Or this one?:
<body>
..blah..blah..
..call above functions on some events like onclick,onfocus,etc..
<script language="JavaScript" src="JS_File_100_KiloBytes">
function f1() {
.. some logic reqd. for manipulating contents in a webpage
}
</script>
</body>
Need not tell everything is again in the <html> tag!!
How does it affect performance of webpage while loading? Does it really? Which one is the best, either out of these 3 or some other which you know?
And one more thing, I googled a bit on this, from which I went here: Best Practices for Speeding Up Your Web Site and it suggests put scripts at the bottom, but traditionally many people put it in <head> tag which is above the <body> tag. I know it's NOT a rule but many prefer it that way. If you don't believe it, just view source of this page! And tell me what's the better style for best performance.
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