var str = "零五科技(www.02405.com)(IT知识分享)(欢迎)";
str = str.slice(0, str.lastIndexOf('(')); // 截取最后一个括号之前的所有字符
console.log(str); // 零五科技(www.02405.com)(IT知识分享)
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来源:https://www.02405.com/archives/1911