javascript - javascript regex replace variable

Question

How can i replace character with regex, but from variable. Example:

var separator = '-';
text = text.replace(/[-\s]+/g, separator);

this will replace - trailing character with separator, which i the same in this case.

So, i need to set this - character from variable separator:

var separator = '-';
var regex = '/['+separator+'\s]+/g';
text = text.replace(regex, separator);

How can i do this? Thanks.

Answer 1

用于RegExp动态生成正则表达式：

function escapeRegExp(string){
    return string.replace(/([.*+?^=!:${}()|\[\]\/\\])/g, "\\$1");
}
var regex = new RegExp('[' + escapeRegExp(separator) + '\\s]', 'g');

escapeRegExp来自正则表达式 - JavaScript | MDN。

注意：你必须逃脱\，并且separator。