When I launch this in chrome, nothing appears on the page.
<!DOCTYPE html>
<head><title>test 4000</title><head>
<body>
<script src="//ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js">
document.writeln("test")
</script>
</body>
</html>
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Guam
- 1
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3you shouldn't put inline scripts in a script tag that references an external script – fgshepard Aug 22 '14 at 21:29
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Maybe you try to open this file right from you disk (I mean not from server). In this case Chrome trying to find including script as file://ajax.googleapis.com... – Semyon Vyskubov Aug 22 '14 at 21:30
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1See http://stackoverflow.com/questions/6528325/what-does-a-script-tag-with-src-and-content-mean – Chubas Aug 22 '14 at 21:30
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Change ` – Blazemonger Aug 22 '14 at 21:30
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@Blazemonger there is nothing wrong with the `src="//ajax` it will default to use the same protocol as the page. – Jez D Aug 22 '14 at 21:32
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1@JezD ...which doesn't work if you're running it as a local file. `src="//` only works when running from a webserver. – Blazemonger Aug 22 '14 at 21:32
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1@Guam you've not closed your `` tag, you seem to be opening one inside another and closing neither – Jez D Aug 22 '14 at 21:34
1 Answers
6
you are inserting code in a script tag that you are also using to load an external script (jQuery). you should either do the one or the other.
<script>
document.writeln("test");
</script>
if you want both do:
<script src="//ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<script>
document.writeln("test");
</script>
the reference states:
If the src has a URI value, user agents must ignore the element's contents and retrieve the script via the URI.
you do not need to include jQuery to use document.writeln()
dreamlab
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1The "type=text/javascript" attribute is redundant, btw. You can safely take it away. – hugomg Aug 22 '14 at 21:36
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2The relevant reference is http://www.w3.org/TR/REC-html40/interact/scripts.html#edef-SCRIPT which says: “If the `src` has a URI value, user agents must ignore the element's contents and retrieve the script via the URI.” – Jukka K. Korpela Aug 22 '14 at 21:39
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The reason that this behaviour is in the html5 standard is because it was already implemented by every browser out there. So in practice, ommiting the script type is also an "html4" feature. (This is also why the html5 doctype declaration is the way it is) – hugomg Aug 22 '14 at 21:42
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html 4.01 [reference](http://www.w3.org/TR/html401/interact/scripts.html#adef-type-SCRIPT) says `The scripting language is specified as a content type (e.g., "text/javascript"). Authors must supply a value for this attribute. There is no default value for this attribute.` although browsers assumed it anyway. – dreamlab Aug 22 '14 at 21:44