SOURCE

Promise.resolve("hello world").then(function(value){
    console.log(value);
});
Promise.reject(new Error("报错"));
function testPromise(ready){
    return new Promise(function(resolve, reject){
        if(ready){
            resolve("hello world");        
        }else{
            reject(new Error("错误").message);        
        }
    });
};
//方法调用
testPromise(false).then(function(msg){
    console.log(msg);
},function(error){
    console.log(error);
});