检查 JavaScript 字符串是否为 URL [英] Check if a JavaScript string is a URL

问题描述

JavaScript 中有没有办法检查字符串是否是 URL?

Is there a way in JavaScript to check if a string is a URL?

RegEx 被排除，因为 URL 很可能像 stackoverflow 那样写；也就是说，它可能没有 .com、www 或 http.

RegExes are excluded because the URL is most likely written like stackoverflow; that is to say that it might not have a .com, www or http.

推荐答案

一个相关问题的答案:

Javascript 正则表达式 URL 匹配

或者来自 Devshed:

function validURL(str) {
  var pattern = new RegExp('^(https?:\/\/)?'+ // protocol
    '((([a-z\d]([a-z\d-]*[a-z\d])*)\.)+[a-z]{2,}|'+ // domain name
    '((\d{1,3}\.){3}\d{1,3}))'+ // OR ip (v4) address
    '(\:\d+)?(\/[-a-z\d%_.~+]*)*'+ // port and path
    '(\?[;&a-z\d%_.~+=-]*)?'+ // query string
    '(\#[-a-z\d_]*)?$','i'); // fragment locator
  return !!pattern.test(str);
}

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