Question

我试图将变量传递给done回调，但没有运气。

var getDataForCompany = function(company_id) {

    $.ajax({
      type: "post",
      url: url,
      data:{
        company_id: company_id 
      }

    }).done(function(returnedData, textStatus, jqXHR) {

      anotherFn(company_id);
      //need to access company_id here, but it is undefined


    });

};

我尝试在IIFE中包装整个AJAX请求以尝试创建一个闭包来捕获我的company_id，但

var getDataForCompany = function(company_id) {

    ($.ajax({
      type: "post",
      url: url,
      data:{
        company_id: company_id 
      }

    }).done(function(returnedData, textStatus, jqXHR) {

      anotherFn(company_id);
      //need to access company_id here, but it is undefined


    })(company_id);

};

也没能奏效。这不是正确的方法吗？

Answer 1

正如评论中所提到的，匿名完成函数应该引用通过getDataForCompany调用传入的company_id。传入时可能只是未定义。下面的代码类似于ajax调用的闭包设置。如果运行该方法，您将看到将记录company_id。

var getDataForCompany = function(company_id) {

    var done  = function() {
        console.log(company_id)
    }

    done();
};





getDataForCompany("ID")
>>"ID"
getDataForCompany()
>>undefined

Answer 2

尝试

var getDataForCompany = function(company_id) {
    return $.ajax({
      type: "POST",
      url: url,
      data:{
        company_id: company_id
      }
    })
    .done(function(returnedData, textStatus, jqXHR) {
      var company_id = this.url.split(/company_id=/)[1];
      console.log(company_id);
      return anotherFn(company_id);
      //need to access company_id here, but it is undefined
    });
};

＆＃13;

var anotherFn = function(company_id) {
  return $.ajax({
      type: "GET",
      url: "https://gist.githubusercontent.com/guest271314/23e61e522a14d45a35e1/raw/62775b7420f8df6b3d83244270d26495e40a1e9d/ticker.json",
      data:{
        company_id: JSON.stringify(company_id)
      },
      dataType: "json"
    }).done(function(data) {
       console.log(this.url.split(/company_id=/)[1])
    })
  };

var getDataForCompany = function(company_id) {

    return $.ajax({
      type: "GET",
      url: "https://gist.githubusercontent.com/guest271314/23e61e522a14d45a35e1/raw/62775b7420f8df6b3d83244270d26495e40a1e9d/ticker.json",
      data:{
        company_id: company_id
      },
      dataType: "json"
    }).done(function(returnedData, textStatus, jqXHR) {
      var company_id = this.url.split(/company_id=/)[1];
      console.log(company_id);
      return anotherFn(parseInt(company_id) + 1);
      //need to access company_id here, but it is undefined


    });

};

  getDataForCompany(1);

＆＃13;

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>

＆＃13;

将变量传递给延迟完成

2 个答案: