请求超时

//请求某个图片资源
function requestImg(){
    var p = new Promise(function(resolve, reject){
        var img = new Image();
        img.onload = function(){
           resolve(img);
        }
        //img.src = "https://b-gold-cdn.xitu.io/v3/static/img/logo.a7995ad.svg"; 正确的
        img.src = "https://b-gold-cdn.xitu.io/v3/static/img/logo.a7995ad.svg1";
    });
    return p;
}
 
//延时函数，用于给请求计时
function timeout(){
    var p = new Promise(function(resolve, reject){
        setTimeout(function(){
            reject('图片请求超时');
        }, 5000);
    });
    return p;
}
 
Promise
.race([requestImg(), timeout()])
.then(function(results){
    console.log(results);
})
.catch(function(reason){
    console.log(reason);
});