I am working on a web site, and am wondering if you need to put quotation marks around HTML attributes for example I've seen code like:
<img src=http://example.com/image.jpg width=350px height=200px />
instead of:
<img src="http://example.com/image.jpg" width="350px" height="200px" />.
Does anyone know the answer to this?
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Pete K.
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3It's best practice to have double-quotes for attributes; specially for those that contain multiple elements within (i.e. `style="width:300px; height: 200px;"`, etc.) – blurfus Apr 06 '17 at 01:54
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If the attribute contains a string that is not ascii or has whitespace then you need to wrap it in quotes
Attributes are placed inside the start tag, and consist of a name and a value, separated by an "=" character. The attribute value can remain unquoted if it doesn't contain ASCII whitespace or any of " ' ` = < or >. Otherwise, it has to be quoted using either single or double quotes. The value, along with the "=" character, can be omitted altogether if the value is the empty string.
link here
repzero
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[Updated link](https://html.spec.whatwg.org/#a-quick-introduction-to-html) – edemaine Aug 04 '21 at 18:06