According to the MDN attribute selector in CSS, it has the following syntax:
div[attr="actualValue"]
For example:
<div class="test"></div>
div[class="test"]
However, I have observed that the quotes around the test are not necessary as shown here:
div[class=test]
For instance:
div[class=test] {
background: #6ea7b2;
}<div class="test">I am a div</div>Why is this so? Does the W3C specification allow attribute selection without quotes around the value?
According to the guidelines:
According to CSS standards, attribute values should either be identifiers or strings.
"example" is considered a string and is acceptable.
example is seen as an identifier and also meets the requirements.
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