jQuery AJAX每个循环都使用append和html [英] jQuery AJAX each loop using append and html

问题描述

我想从下面的代码中检索json文件的数据，但是问题是，如果我再次按下该按钮，则会看到两倍的结果.我将每个循环的第一个附加项更改为html，但随后仅加载了json的最后一个对象.

I want from the following code to retrieve the data of the json file but the problem is that if I press again the button I see twice the results. I changed the first append of my each loop to html but then only the last object of my json is loaded.

HTML:

<ul id="myorders"></ul>
<button type="button" id="add-order">Load the orders</button>

JS:

$("#add-order").click(function(){ 

    $.getJSON('API/orders.json', function(data){

        $.each(data, function(i, order){
            $("#myorders").append("<p><li> id: " + data[i].order.id + "</li>");
            $("#myorders").append("<li> Name: " + data[i].order.name + "</li>");
            $("#myorders").append("<li> Drink: " + data[i].order.drink + "</li></p>")
        });         
    });
});

数据示例:

[{ "order":{"id": "1",
    "name": "Bill",
    "drink": "Capuccino"}},


  { "order":{"id": "2",
    "name": "Sofia",
    "drink": "Late"
}}]

推荐答案

工作中的小提琴 .

Working fiddle.

.one() :将处理程序附加到事件要素.每种事件类型的每个元素最多只能执行一次处理程序.

.one() : Attach a handler to an event for the elements. The handler is executed at most once per element per event type.

您可以使用JQuery one()一次触发点击:

You could use JQuery one() that will trigger the click one time :

$("#add-order").one("click", function(){ 
    $.getJSON('API/orders.json', function(data){

        var my_orders = $("#myorders");

        $.each(data, function(i, order){
            my_orders.append("<li> id: " + data[i].order.id + "</li>");
            my_orders.append("<li> Name: " + data[i].order.name + "</li>");
            my_orders.append("<li> Drink: " + data[i].order.drink + "</li>")
        });    
    }); 
});

注意::您附加了无效的HTML，<li>标记应为ul的直接子代，因此应删除p.

NOTE : You append invalid HTML, <li> tag should be a direct child of ul so you should remove p.

希望这会有所帮助.

var data = [{ "order":{"id": "1",
    "name": "Bill",
    "drink": "Capuccino"}},


  { "order":{"id": "2",
    "name": "Sofia",
    "drink": "Late"
}}]

$("#add-order").one("click", function(){ 
  var my_orders = $("#myorders");

  $.each(data, function(i, order){
    my_orders.append("<li> id: " + data[i].order.id + "</li>");
    my_orders.append("<li> Name: " + data[i].order.name + "</li>");
    my_orders.append("<li> Drink: " + data[i].order.drink + "</li>")
  });   
});

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<ul id="myorders"></ul>
<button type="button" id="add-order">Load the orders</button>

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