css - Why use an attribute selector to match classes? -


i have found an example of responsive email templates there such css selectors such following:

a[class="btn"]

why syntax used if it's totally same as:

a.btn

does have impact on mobile browsers or else?

the [] syntax attribute selector.

a[class="btn"]

this select <a> tag class="btn". however, not select <a> has class="btn btn_red", example (whereas a.btn would). exactly matches attribute.

you may want read the 30 css selectors must memorize. it's invaluable up-and-coming web developer.


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