浏览器是否是IE判断以及当前js的来源地址获取

1 背景

• 在引入第三方的库时需要用到对应的资源host地址
• IE目前Cesium已经抛弃，但有时候项目还要支持，故需要判断增加1.83版本的支持

2 方案

2.1 当前js来源获取

var currentScript =document.currentScript ||(function () {var scripts = document.getElementsByTagName("script");return scripts[scripts.length - 1];})();var src = currentScript.src;

2.2 IE浏览器判断

var theNavigator;
if (typeof navigator !== "undefined") {theNavigator = navigator;
} else {theNavigator = {};
}
var isInternetExplorerResult = false;
function isInternetExplorer() {var fields;if (theNavigator.appName === "Microsoft Internet Explorer") {fields = /MSIE ([0-9]{1,}[\.0-9]{0,})/.exec(theNavigator.userAgent);if (fields !== null) {isInternetExplorerResult = true;}} else if (theNavigator.appName === "Netscape") {fields = /Trident\/.*rv:([0-9]{1,}[\.0-9]{0,})/.exec(theNavigator.userAgent);if (fields !== null) {isInternetExplorerResult = true;}}console.log("isInternetExplorerResult", isInternetExplorerResult);return isInternetExplorerResult;
}
isInternetExplorer();