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Asked:2020-05-06 23:43:56 +0000 UTC2020-05-06 23:43:56 +0000 UTC

寻求有关 async / await 解决方案语法的建议

  • 772
function getRes(a,b) {                          
  $.ajax({
   type: "post",
   url: url,
   data: {val1: a, val2: b},                   
     success: function(data) {
       return data;
     }                                                                               
  });
}

(async function() {
 var res = await getRes(2,3);
   console.log(res); // undefined
 })();

设定的目标——实现getRes()不同部分代码的多次使用没有实现，结果是undefined. 请告知我做错了什么以及如何解决它。

javascript

2 个回答

  1. Best Answer

    return在功能上应该有帮助

    function getRes(a, b) {
  return $.ajax({
    type: "post",
    url: url,
    data: {
      val1: a,
      val2: b
    }
  });
}

(async function() {
  var res = await getRes(2, 3);
  console.log(res); // undefined
})();

    • 1 
  2. function getRes(a,b) {
  return new Promise((resolve, reject) => {
    $.ajax({
      type: "post",
      url: url,
      data: {val1: a, val2: b},                   
      success: resolve,
      error: reject,
    });
  })
}

(async function() {
  var res = await getRes(2,3);
  console.log(res);
})();
    • 0

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