angular.js - 执行顺序问题，angular需要后台拿到数据后编译directive

Question

打开一个页面，需要先发起一个$http请求从后台拿到数据，然后将数据的某几个字段作为参数传递给directive中去编译。

现在问题是页面一打开好像就执行directive中的代码了。因为数据还没有拿到，会报错。如何调整？

已尝试并成功：先拿代码数据然后使用$compile去动态编译directive然后append到dom中。
想了解其他好的方法。

Answer 1

1. You can use Promise to encapsulate the AJAX request, and then perform subsequent operations after receiving the result in the instruction.
2. You can directly use $watch in the instruction to check whether the correct data is returned, and then perform subsequent operations. However, it is recommended that $watch is only used to check the data update status and not perform other operations.

Answer 2

It’s not clear what your requirements are. You just described a directive value-passing compilation problem

Answer 3

Tell us how to bind the data object to the DOM, use the instruction to get the data on the DOM, and then request the data in the controller