CSS Style assignment

I have this defined in an existing CSS sheet that I'm 开发者_JAVA技巧working with:

label.error-field

To assign this to an html element do I simply do class="error-field" or do I add the label to have it be class="label.error-field"?

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This is the right way:

<label class="error-field">My Label</label>

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label.error-field is only applied to <label> elements with the class "error-field".

So if you want it on a label, then you'd just assign the class as "error-field", like this:

<label class="error-field">

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This will only work on labels.

<label class="error-field">I'm an error label, yo ho ho</label>

The label. part is a CSS type (element) selector with a class (.) selector.

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Add it simply to the label. class="error-field".

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label.error-field will select an element label with a class of error-field

<label class="error-field">...</label>