onerror.user.js

// ==UserScript==
// @name        onerror
// @description onerror
// @include     *
// @version     1.0.7
// @created     2020-12-13 14:09:27
// @modified    2021/1/9 20:57:58
// @author      dodying
// @namespace   https://github.com/dodying/UserJs
// @supportURL  https://github.com/dodying/UserJs/issues
// @icon        https://cdn.jsdelivr.net/gh/dodying/UserJs@master/Logo.png
// @run-at      document-end
// @grant       none
// @noframes
// ==/UserScript==
/* global  */
/* eslint-disable no-debugger  */
(function () {
  'use strict';
  // 来自 https://developer.mozilla.org/zh-CN/docs/Web/API/GlobalEventHandlers/onerror#注意事项
  window.onerror = function (msg, url, lineNo, columnNo, error) {
    var string = msg.toLowerCase();
    var substring = 'script error';
    if (string.indexOf(substring) > -1) {
      window.alert('Script Error: See Browser Console for Detail');
    } else {
      var message = [
        'Message: ' + msg,
        'URL: ' + url,
        'Line: ' + lineNo,
        'Column: ' + columnNo,
        'Error object: ' + JSON.stringify(error)
      ].join(' - ');

      window.alert(message);
    }

    return false;
  };
})();