我对JavaScript有点新手,而且我在开发Chrome扩展程序时遇到问题。
以下是HTML代码段:
<div id="tabs-2">
<div id="divIncome">
<label for="box1">Label1</label>
<div>
<input type="text" id="box1" />
</div>
<label for="box2">Label2</label>
<div>
<input type="text" id="box2" />
</div>
<label for="box3">Label3</label>
<div>
<input type="text" id="box3" />
</div>
</div>
<button type="button" class="button waves-effect" id="btnAddBox">Add Box</button><br />
<div id="totalBox"></div>
</div>
上面代码中的按钮会触发添加输入值行的事件,并显示删除图标。这很好。
我希望的效果是让用户能够单击删除图标并删除该行,但是当用户单击该图标时,我无法触发该事件。我尝试选择使用类,名称和每种可能的方法,但没有任何作用。
这是JavaScript:
$(function () {
// WORKING
$("#btnAddIncome").on("click",
function (e) {
var $newOtherIncome = $("<label for='newBox'>New Label</label><div><span><input type='text' id='newBox' style='width:95%' /></span><span style='float:right' class='delete' id='delete'><i class='material-icons delete' style='font-size:20px;'>delete</i></span>");
$("#divIncome").append($newOtherIncome);
});
// NOT FIRING
$("#delete").on("click",
function(e) {
alert(e.type);
});
// NOT FIRING
$(".delete").on("click",
function(e) {
alert(e.type);
});
}
);
非常感谢任何帮助!
答案 0 :(得分:2)
您使用的是class
删除而不是ID
在您的#divIncome
附加的代码的这一部分中:
<label for='newBox'>New Label</label>
<div>
<span>
<input type='text' id='newBox' style='width:95%' />
</span>
<span style='float:right' class='delete' id='delete'>
<i class='material-icons delete' style='font-size:20px;'>delete</i>
</span>
您在delete
和<span>
元素上使用<i>
作为课程
只需触发它们就像这样:
$(document).on("click", ".delete", function(){
//Do your stuff
});
使用动态生成的元素时,使用$(document).on()
触发事件非常重要,否则不会被触发
答案 1 :(得分:1)
如上面的回答所述,您以错误的方式实施了.on()
方法。在这里,我的代码几乎没有改进。最佳实践是基于较近的选择器搜索元素,而不是搜索整个document
。在以下代码中,我搜索了.delete
类,其中div
的ID为divIncome
。它是安全且快速的,而不是document
。
$(function () {
// WORKING
$("#btnAddBox").on("click",
function (e) {
var $newOtherIncome = $("<div class='newBoxParent'><label for='newBox'>New Label</label><div><span><input type='text' id='newBox' style='width:95%' /></span><button style='float:right' class='delete' id='delete'><i class='material-icons delete' style='font-size:20px;'>delete</i></button></div>");
$("#divIncome").append($newOtherIncome);
});
// NOT FIRING
$("#divIncome").on("click",'.delete',
function(e) {
$(this).parents('.newBoxParent').remove();
});
// NOT FIRING
}
);
&#13;
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div id="tabs-2">
<div id="divIncome">
<label for="box1">Label1</label>
<div>
<input type="text" id="box1" />
</div>
<label for="box2">Label2</label>
<div>
<input type="text" id="box2" />
</div>
<label for="box3">Label3</label>
<div>
<input type="text" id="box3" />
</div>
</div>
<button type="button" class="button waves-effect" id="btnAddBox">Add Box</button><br />
<div id="totalBox"></div>
</div>
&#13;
答案 2 :(得分:1)
$(function () {
// WORKING
$("#btnAddBox").on("click",
function (e) {
var $newOtherIncome = $("<label for='newBox'>New Label</label><div><span><input type='text' id='newBox' style='width:95%' /></span><span style='float:right' class='delete' id='delete'><i class='material-icons delete' style='font-size:20px;'>delete</i></span>");
$("#divIncome").append($newOtherIncome);
});
$(document).on("click", ".delete"
function(e) {
alert(e.type);
});
}
);
答案 3 :(得分:0)
您正在动态地将DOM添加到文档中。您在开头添加的所有侦听器都不适用于新的侦听器。对于这种情况,jQuery使用文档或将要添加它的父项将监听器设置为$(document).on('click','selector',callBack);
Jquery .on 在您的情况下,选择器为.delete
。我添加了删除功能,您可以在以下代码段中看到
$(function () {
// WORKING
$("#btnAddBox").on("click",
function (e) {
var $newOtherIncome = $("<div class='newBoxParent'><label for='newBox'>New Label</label><div><span><input type='text' id='newBox' style='width:95%' /></span><button style='float:right' class='delete' id='delete'><i class='material-icons delete' style='font-size:20px;'>delete</i></button></div>");
$("#divIncome").append($newOtherIncome);
});
// NOT FIRING
$(document).on("click",'.delete',
function(e) {
$(this).parents('.newBoxParent').remove();
});
}
);
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div id="tabs-2">
<div id="divIncome">
<label for="box1">Label1</label>
<div>
<input type="text" id="box1" />
</div>
<label for="box2">Label2</label>
<div>
<input type="text" id="box2" />
</div>
<label for="box3">Label3</label>
<div>
<input type="text" id="box3" />
</div>
</div>
<button type="button" class="button waves-effect" id="btnAddBox">Add Box</button><br />
<div id="totalBox"></div>
</div>