p1 是一个 Promise，你必须等待它评估并使用 Promise 要求的值.

p1 is a Promise, you have to wait for it to evaluate and use the values as are required by Promise.

您可以在这里阅读:http://www.html5rocks.com/en/教程/es6/promises/

尽管 result 仅在已解析的函数中可用，但您可以使用一个简单的变量对其进行扩展

Although the result is available only inside the resolved function, you can extend it using a simple variable

var res;
p1.then(function(result){
    res = result; // Now you can use res everywhere
});

但是请注意，只有在 promise 解决后才使用 res，如果您依赖该值，请从 .then 内部调用下一个函数，如下所示:>

But be mindful to use res only after the promise resolved, if you depend on that value, call the next function from inside the .then like this:

var res;
p1.then(function(result){
    var abc = NextFunction(result);
});