串联或并联调用多个ajax请求 [英] Call Multiple ajax request in series or parallel

问题描述

我有3个功能.

load_graphs('national','','container-natl-rates','container-natl-counts')
load_graphs('division','Western','container-west-rates','container-west-counts')
load_graphs('division','Eatern','container-east-rates','container-east-counts')

load_graphs是执行ajax调用并创建图形的函数.

load_graphs is a function that performs a ajax call and creates a graph.

当前，此调用是异步完成的，但是我希望在完成每个单独的调用后像回叫一样执行.

Currently, this calls are done asynchronously but I want to perform like a call back after completing each individual calls.

推荐答案

使用诺言.

使用诺言是处理类似这样的事情的好方法，其中下一个任务需要上一个任务的值(或者至少要先完成上一个任务的值).

Using a promise is a great way to handle things like this where the next task requires a value from the previous task (or at least for the previous task to be completed first).

https://scotch.io/tutorials/javascript-promises-for-dummies

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