Question

在编写正则表达式以获取浏览器和版本的过程中。这就是我到目前为止所拥有的。任何人都可以建议更好的过程吗？正则表达式将检查IE / Firefox / Safari / Chrome，我可以查看版本号。

import flashx.textLayout.formats.BackgroundColor;

var inputField:TextField = new TextField();
var displayField:TextField = new TextField();

// RegExp 
var reg:RegExp = /(MSIE|(?!Gecko.+)Firefox|(?!AppleWebKit.+Chrome.+)Safari|(?!AppleWebKit.+)Chrome|AppleWebKit(?!.+Chrome|.+Safari)|Gecko(?!.+Firefox)   (SeaMonkey))(?: |\/)([\d]+)/i;

inputField.border = true;
inputField.width = 500;
inputField.height = 50;
inputField.x = 75;
inputField.y = 50;
inputField.type = "input";
inputField.multiline = true;
addChild(inputField);

displayField.border = true;
displayField.width = 500;
displayField.height = 200;
displayField.backgroundColor = 0x666666;
displayField.x = 75;
displayField.y = inputField.y + 50 + inputField.height;
displayField.multiline = true;
addChild(displayField);

inputField.addEventListener(Event.CHANGE, changeListener, false, 0, true);


function changeListener(event:Event):void
{
    var strToTest:String = inputField.text;
    var textToDisplay:String = "";
    if(reg.test(strToTest))
    {
        var browser:String = strToTest.match(reg)[1];
        var version:int = strToTest.match(reg)[2];

        var chromeVersion:int = 29;
        var firefoxVersion:int = 23;
        var ieVersion:int = 7;
        var safariVersion:int = 6;

        textToDisplay += "BROWSER IS " + browser;
        textToDisplay += "\nVersion " + version;


        if(browser == "Chrome")
        {
            if(version <= chromeVersion)
            {
                textToDisplay += "\nUPDATE CHROME - VERSION BELOW " +  chromeVersion;

            }
            else
            {

                textToDisplay += "\nVERSION GREATER THAN " + chromeVersion;
            }

        }
        else if(browser == "MSIE")
        {
            if(version <= ieVersion)
            {
                textToDisplay += "\nUPDATE CHROME - VERSION BELOW " + ieVersion;

            }
            else
            {

                textToDisplay += "\nVERSION GREATER THAN " + ieVersion;
            }

        }
        else if (browser == "Firefox")
        {
            if(version <= firefoxVersion)
            {
                textToDisplay += "\nUPDATE CHROME - VERSION BELOW " + firefoxVersion;

            }
            else
            {

                textToDisplay += "\nVERSION GREATER THAN " + firefoxVersion;
            }
        }
        else if (browser == "Safari")
        {
            if(version <= safariVersion)
            {
                textToDisplay += "\nUPDATE CHROME - VERSION BELOW " + safariVersion;

            }
            else
            {

                textToDisplay += "\nVERSION GREATER THAN " + safariVersion;
            }

        }






    }
    else
    {

        textToDisplay = "Browser is NOT IE/FIREFOX/SAFARI/CHROME"

    }

    displayField.text = textToDisplay;

}

Answer 1

（MSIE（？！。+ Opera）| Firefox（？！。+ SeaMonkey）|版本（？=。+ Safari）（？！。+ Chrome）| Chrome）（？：| /）（[\ d] ] +）

我简化了正则表达式以遵循这些检查https://developer.mozilla.org/en-US/docs/Browser_detection_using_the_user_agent。

我不想使用我希望了解的第三方库，因为我可能需要进行更改。以下代码似乎正确地返回我想要的内容。

（MSIE（？！。+ Opera）| Firefox（？！。+ SeaMonkey）|版本（？=。+ Safari）（？！。+ Chrome）| Chrome）（？：| /）（[\ d] ] +）

检查浏览器的最佳流程

1 个答案: