正則 去除字符串中的特殊字符

var str="你的字符串~!#$%^&*()_+";

//你要清除的符號都放在方括號里,記得要用斜杠\轉義一下,不然會出錯

str = str.replace(/[要清除的符號]/g,'');

eg:

var url = 'https://gw.dushu.io/r/34440a483c1c'
console.log(trim(url))   //結果：httpsgwdushuior34440a483c1c
function trim(url) {
    url = url.replace(/\:/g,'');
    url = url.replace(/\//g,'');
    url = url.replace(/\./g,'');
    return url
}