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A friend of the selector can try this idea to delay the merge selection operation.

Source: Internet
Author: User
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This is similar to the four selection operations in the same code segment below.
$ Class ("a"). color ("green ");
$ Class ("B"). color ("red ");
$ Class ("c"). color ("green ");
$ Class ("d"). color ("red ");
In the end, only one traversal is required.
Because I have been too concerned about selector before, and I don't know if I am out. I already thought of it?
The following is the sample, which is selected for traversal twice.
<Body> aaaaaaaaaaaaaa bbbbbbbbbbbb cccccccccccccccc </body>
[Ctrl + A select all Note: If you need to introduce external Js, You need to refresh it to execute]

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