h5怎样唤醒app

var last = Date.now(),

    doc = window.document,

    ifr = doc.createElement('iframe');

//创建一个隐藏的iframe

ifr.src = nativeUrl;

ifr.style.cssText = 'display:none;border:0;width:0;height:0;';

doc.body.appendChild(ifr);

setTimeout(function() {

    doc.body.removeChild(ifr);

    //setTimeout回小于2000一般为唤起失败

    if (Date.now() - last < 2000) {

        if (typeof onFail == 'function') {

            onFail();

        } else {

            //弹窗提示或下载处理等

        }

    } else {

        if (typeof onSuccess == 'function') {

            onSuccess();

        }

    }

}, 1000);