Question

目前我的AJAX调用是这样设置的，这样当检测到逗号键时，AJAX调用就会触发：

$("#selector").on("keyup", function(e) {
    if (e.which === 188) {

        var search = $(this).val();

        function searchTag() {
            return $.ajax({
                cache:      false,
                url:        url,
                dataType:   "json",
                type:       "post",
                data:       {search: search}
            });             
        }

        searchTag().done(function(data) {
            //Success
        });
    }
});

我希望稍后在我的代码中重用AJAX调用作为另一个事件监听器的一部分：

$("body").on("click", ".tag", function () {
    searchTag();
});

如果不重写整个调用，如何使函数独立以便可以在两种情况下使用？

Answer 1

将功能移到外面：

function searchTag(data) {
    var url = "yoururl";
    return $.ajax({
        cache:      false,
        url:        url,
        dataType:   "json",
        type:       "post",
        data:       data
    });             
}

$("#selector").on("keyup", function(e) {
    if (e.which === 188) {

        var search = {search: $(this).val()};


        searchTag(search).done(function(data) {
            //Success
        });
    }
});

$("body").on("click", ".tag", function () {
    searchTag({});
});

Answer 2

从事件中删除该函数，并将搜索值和url作为输入添加为输入：

function searchTag(searchVal, url) {
            return $.ajax({
                cache:      false,
                url:        url,
                dataType:   "json",
                type:       "post",
                data:       {search: searchVal}
            });             
        }

$("body").on("click", ".tag", function () {
    var searchVal = $(this).val();
    var url = document.URL; //use any url here
    searchTag(searchVal, url);
});

你甚至可以使用回调：

function searchTag(searchVal, url, callbck) {
            return $.ajax({
                cache:      false,
                url:        url,
                dataType:   "json",
                type:       "post",
                data:       {search: searchVal}
            }).done(function(){
              callbck();
            });             
        }

$("body").on("click", ".tag", function () {
    var searchVal = $(this).val();
    var url = document.URL; //use any url here
    searchTag(searchVal, url, function(){
        //do something here..
    });
});

Answer 3

这个怎么样：

///tag -> tag to search
///cb  -> callback to executed on success
var searchTag = function(tag, cb) {
    var url = "http://example.com";
    var request = $.ajax({
        cache:      false,
        url:        url,
        dataType:   "json",
        type:       "post",
        data:       {search: tag}
    });          
    request.done(cb);
}

$("#selector").on("keyup", function(e) {
    if (e.which === 188) { 
        var search = $(this).val();
        searchTag(search, function(data) {
            //Success
        });
    }
});

$("body").on("click", ".tag", function () {
     //I don't actually know where the tag to search is stored
     var search = $(this).html();
     searchTag(search);
});

Answer 4

公开了2种方法：Reusable Ajax Post/Get发布和获取，它们都需要相同的输入参数：URL，数据以及成功和错误回调。

"use strict";

var AjaxHandler = (function($) {
    var handler = {};

    handler.post = function(url, data, success, error) {
        $.ajax({
            url: url,
            type: "POST",
            data: data,
            success: function(result) {
                success(result);
            },
            error: function(ex) {
                error(ex);
            }
        });
    }

    handler.get = function(url, data, success, error) {
        $.ajax({
            url: url,
            type: "GET",
            data: data,
            success: function(result) {
                success(result);
            },
            error: function(ex) {
                error(ex);
            }
        });
    }

    return handler;

}(jQuery));

用法示例：

AjaxHandler.post(
  "http://jsonplaceholder.typicode.com/posts/1", 
  null, 
  function () { console.info('success'); }, 
  function () { console.error('failure');}
);

多次重用AJAX功能

4 个答案: