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jQuery: Difference analysis of whether there is a space before nth-child_jquery

WBOYOriginal: 2016-05-16 18:04:56976browse

Then, I wrote the following html:

12

td>31

The expected effect is:

So I wrote the following jQ:

$(".a:nth-child(2)").css("color","red");

The result of running the operation is actually: jQuery: Difference analysis of whether there is a space before nth-child_jquery

I am puzzled. . Finally, I found that JQ was rewritten as:

$(".a :nth-child(2)").css("color","red");

That’s it. jQuery: Difference analysis of whether there is a space before nth-child_jquery

Note: There is a space after a! ! !

Although the problem has been solved, I don’t know the cause. Please give me some guidance. . .

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jQuery: Difference analysis of whether there is a space before nth-child_jquery

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