execTimeout

window.execEx = function(fn, maxTime) {
    return new Promise(function (resolve, reject) {
        var timer = setTimeout(function () {
            if(timer) {
                timer = false;
                console.log('reject');
                reject();
            }
        }, maxTime);
        var f = function() {
            if(timer) {
                timer = false;
                console.log('resolve')
                resolve();
                clearTimeout(timer);
            }
        };
        fn(f);
    })
}