如何用js匹配某个字符串后面的字符串

Question

如何用js正则匹配 User-Agent appVersion/2.6.5 DeviceId=C797D3CB-725A-4758-A193-B841DBBD69AC Channel=appStore 中 appVersion 后面的2.6.5

Answer 1

a = "User-Agent appVersion/2.6.5 DeviceId=C797D3CB-725A-4758-A193-B841DBBD69AC Channel=appStore"
reg = /appVersion\/([\d\.]*)/
v = reg.exec(a)[1];
console.log(v); // 2.6.5

Answer 2

var userAgent = "User-Agent appVersion/2.6.5 DeviceId=C797D3CB-725A-4758-A193-B841DBBD69AC Channel=appStore";
var re = /User-Agent appVersion\/((\d\.?)+)/;
var version = userAgent.match(re)[1];

Answer 3

(\d+\.)+\d+(?=\s)

如果就只是这段字符串的话。

Answer 4

var params = str.slice(str.indexOf("?")+1);//第二个参数不写，获取到末尾

    params = params.split('&');
    for (var i=0;i<params.length;i++ ) {
        var attr = params[i].split('=');
        console.log(attr);
    console.log(attr[0]+":"+attr[1]);