h5 js判断是IOS系统还是android系统

function detect(){
        var equipmentType = "";
        var agent = navigator.userAgent.toLowerCase();
        var android = agent.indexOf("android");
        var iphone = agent.indexOf("iphone");
        var ipad = agent.indexOf("ipad");
        if(android != -1){
            equipmentType = "android";
        }
        if(iphone != -1 || ipad != -1){
            equipmentType = "ios";
        }
        return equipmentType;
    }
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原文链接：https://blog.csdn.net/sally18/article/details/84327745