从deferred.then()返回数据时保留参数 [英] Preserving arguments when returning data from deferred.then()

问题描述

在 deferred.then 回调中返回数据时，如何传递多个参数?

How can I pass more than 1 argument when returning data in a deferred.then callback?

var data = {
    json: JSON.stringify({
        text: 'some text',
        array: [1, 2, 'three'],
        object: {
            par1: 'another text',
            par2: [3, 2, 'one'],
            par3: {}
        }
    }),
    delay: 3
};

$.ajax({
    url:'/echo/json/',
    data: data,
    type: 'POST'
}).then(function(response, statusText, jqXhr){
    response.text = 'foo';
    // how to return the rest of the arguments correctly?
    return response;
}).done(function(response, statusText, jqXhr){
    console.log(response); // <- altered response
    console.log(statusText); // <- how to pass it along?
    console.log(jqXhr); // <- how to pass it along?
});

http://jsfiddle.net/rv1aydvb/

推荐答案

您将需要返回 deferred 使用 resolveWith方法解析为多个值.当然，返回单个(但复合)值通常更干净.

You will need to return a deferred that is resolved with multiple values using the resolveWith method. Of course, returning a single (but composite) value is usually cleaner.

$.ajax(…).then(function(response) {
    response.text = 'foo';
    return $.Deferred().resolveWith(this, arguments); // if you don't replace but modify vals
    // alternatively,  .resolveWith(this, [response, …]);
}).done(function(response, statusText, jqXhr) {…});

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