带有变量的Javascript RegEx字符串

Question

I have the following RegEx that works:

var expression = /s\[0\]\[children\]\[.*?\]\[/g;
var replace_string = "s[" + count + "][children][" + subCount + "]";
$input.attr('name', $input.attr('name').replace(expression, replace_string));

Now I am wanting to replace the 0 in the above regex with a variable, "count". I have read up that it needs to be turned into a string, which I have done:

var expression = "/s\\[" + count + "\\]\\[children\\]\\[.*?\\]/g";

But that doesn't want to work for some reason, what am I doing wrong?

Cheers

Answer 1

每当您想从正则表达式中调用变量时，都需要使用RegExp构造函数。

var expression = new RegExp("s\\[" + count + "\\]\\[children\\]\\[.*?\\]", "g");