Javascript在IE中不起作用

Javascript is not working in IE

本文关键字：不起作用 IE Javascript      更新时间：2023-09-26

我正在编写一个javascript，它将获取浏览器信息并将其设置为cookie中，以便将来可以使用它们。setCookies（） 是复杂的 javascript 函数，它将对 navoigator 用户代理进行一些操作并确定浏览器。

此功能似乎适用于所有主流浏览器，但在IE（11,10,9,8,7）中不起作用，我不知道为什么。

其他信息 ： 我正在开发一个 Apache 检票口应用程序，版本 1.4.19。

这是Javascript函数

    <script type="text/javascript">
        function setCookies() {
            var browser;
            var version;

            var click_ev = document.createEvent("MouseEvents");
            click_ev.initEvent("click", true /* bubble */, true /* cancelable */);
            document.cookie = "user_agent=" + navigator.userAgent + "; path=/";
            document.cookie = "navigator_app_platform=" + navigator.platform
                    + "; path=/";
            var platform = navigator.platform;
            if (platform == "iPad" || platform == "iPhone" || platform == "iPod"
                    || platform == "iPod touch") { // For iPhones iPads and iPods
                var userAgent = navigator.userAgent;
                var chromeIndex = userAgent.indexOf("criOS");
                var opera = userAgent.indexOf("OPiOS");
                var ucIndex = userAgent.indexOf("UCBrowser");
                var coast = userAgent.indexOf("Coast");
                var mercury = userAgent.indexOf("Mercury");
                var safari = userAgent.indexOf("Safari");
                var webkit = userAgent.indexOf("AppleWebKit");
                // Chrome detection
                if(chromeIndex > 0) {
                    browser = "chrome";
                    var arr = userAgent.split("criOS/");
                    arr = arr[1].split(".");
                    version = arr[0];
                }
                // Safari detection
                else if(opera < 0 && ucIndex < 0 && coast < 0 && mercury < 0 && safari > 0 && webkit > 0) {
                    browser = "safari";
                    var arr = userAgent.split("AppleWebKit/");
                    arr = arr[1].split(".");
                    version = arr[0];
                } else {
                    browser = "unknown";
                    version = -1;
                }
            } else if(platform == "Win32" || platform == "MacIntel") { // For windows and mac
                // Browser detection
                var isOpera = !!window.opera || navigator.userAgent.indexOf(' OPR/') >= 0;
                // Opera 8.0+ (UA detection to detect Blink/v8-powered Opera)
                var isFirefox = typeof InstallTrigger !== 'undefined'; // Firefox 1.0+
                var isSafari = Object.prototype.toString.call(window.HTMLElement).indexOf('Constructor') > 0;
                // At least Safari 3+: "[object HTMLElementConstructor]"
                var isChrome = !!window.chrome && !isOpera; // Chrome 1+
                var isIE = /*@cc_on!@*/false || !!document.documentMode; // At least IE6

                if (isOpera) {
                    browser = "opera";
                } else if (isFirefox) {
                    browser = "firefox";
                } else if (isChrome) {
                    browser = "chrome";
                } else if (isIE) {
                    browser = "ie";
                } else if (isSafari) {
                    browser = "safari";
                } else {
                    browser = "unknown";
                }
                if (browser == "firefox") {
                    var arr = navigator.userAgent.split("Firefox/");
                    arr = arr[1].split(".");
                    version = arr[0];
                } else if (browser == "chrome") {
                    var arr = navigator.userAgent.split("Chrome/");
                    arr = arr[1].split(".");
                    version = arr[0];
                } else if (browser == "ie") {
                    var arr = navigator.userAgent.split("MSIE ");
                    arr = arr[1].split(".");
                    version = arr[0];
                } else if (browser == "safari") {
                    var arr = navigator.userAgent.split("AppleWebKit/");
                    arr = arr[1].split(" ");
                    arr = arr[0].split(".");
                    version = arr[0];
                } else if (browser == "opera") {
                    var arr = navigator.userAgent.split("OPR/");
                    arr = arr[1].split(".");
                    version = arr[0];
                } else if (browser == "unknown") {
                    version = -1;
                }
            } else if(platform == "Android" || platform == "Linux armv7l") { // For android
                var userAgent = navigator.userAgent;
                var chromeIndex = userAgent.indexOf("Chrome");
                var opera = userAgent.indexOf("OPR");
                var ucIndex = userAgent.indexOf("UCBrowser");
                var coast = userAgent.indexOf("Coast");
                var firefox = userAgent.indexOf("Firefox");
                // Chrome detection
                if(chromeIndex > 0 && opera < 0 && ucIndex < 0 && coast < 0) {
                    browser = "chrome";
                    var arr = userAgent.split("Chrome/");
                    arr = arr[1].split(".");
                    version = arr[0];
                } else if(firefox > 0) { // Firefox detection
                    browser = "firefox";
                    var arr = userAgent.split("Firefox/");
                    arr = arr[1].split(".");
                    version = arr[0];
                } else if(opera > 0) { // Opera detection
                    browser = "opera";
                    var arr = userAgent.split("OPR/");
                    arr = arr[1].split(".");
                    version = arr[0];
                } else { // Unknown browser
                    browser = "unknown";
                    version = -1;
                }
            } else { // For other platforms
                version = -1;
                browser = "other_platform";
            }
            document.cookie = "browser_version=" + version + "; path=/";
            document.cookie = "browser_name=" + browser + "; path=/";
            document.getElementById("redirect").dispatchEvent(click_ev);
        }
    </script>

经过一番玩弄，我确实解决了这个问题。事实证明，在较新版本的IE中，userAgent在每个版本中都不相同。

我的IE10中的用户代理不包含"MSIE"，我试图通过"MSIE"拆分用户代理，这导致了空指针情况。

因此，IE版本检测脚本从：

if (browser == "ie") {
var arr = navigator.userAgent.split("MSIE ");
arr = arr[1].split(".");
version = arr[0];
}

自：

if (browser == "ie") {
var v1 = navigator.userAgent.indexOf("MISE");
var v2 = navigator.userAgent.indexOf("rv:");
if(v1 > 0) {
var arr = navigator.userAgent.split("MSIE ");
arr = arr[1].split(".");
version = arr[0];
} else if(v2 > 0) {
var arr = navigator.userAgent.split("rv:");
arr = arr[1].split(".");
version = arr[0];
}

谢谢:)

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