我需要在altKey按下并鼠标悬停时更改背景和文本颜色。
问题是,我只能对HTML代码中显示的第一行执行此操作,但不能在之后使用jQuery附加的行中执行此操作。
HTML代码:
<div class = "table1">
<table id = "t1" align="center" border=1>
<tr>
<th>First Name</th>
<th>Last Name</th>
<th>Email Address</th>
<th>Telephone Number</th>
</tr>
<tr id = "r">
<tbody>
<td id = "d1" class = "el" contenteditable="true"></td>
<td id = "d2" class = "el" contenteditable="true"></td>
<td id = "d3" class = "el" contenteditable="true"></td>
<td id = "d4" class = "el" contenteditable="true"></td>
<td><button id="del1">Delete</button></td>
</tbody>
</tr>
</table>
</div>
jQuery代码:
$(document).ready(function(){
$("#b1").click(function(){
$('#t1 > tbody:last-child').append('<tr id = "r"><td id = "d1" class = "el" contenteditable="true"></td><td id = "d2" class = "el" contenteditable="true"></td><td id = "d3" class = "el" contenteditable="true"></td><td id = "d4" class = "el" contenteditable="true"></td><td><button id ="del1">Delete</button></td></tr>');
});
$("#t1").on('click','#del1',function(){
$(this).parent().parent().remove();
});
function handler(ev) {
var target = $(ev.target);
var elId = target.attr('id');
if( target.is(".el") ) {
$(this).css("background-color","white");
$(this).css("color","black");
}
}
$(".el").mouseleave(handler);
$(".el").bind('mouseenter keypress','.el', function(e) {
if (e.altKey) {
$(this).css("background-color","blue");
$(this).css("color","red");
}
});
})
答案 0 :(得分:0)
你很亲密。问题是在添加行之前添加了handler
,因此它没有附加到动态添加的行。
在event handler
本身而不是table
上添加rows
,然后在其中检查target
。
答案 1 :(得分:0)
当$(document).ready
函数运行时,事件会附加到DOM元素,即使您动态添加更多具有相同类的元素,事件也不附加到这些元素,因为它们不在那里早。您需要将事件附加到您动态创建的任何新元素:
var btn = document.createElement("button");
btn.addEventListener('click', myFunc, false);
document.body.appendChild(btn);
答案 2 :(得分:0)
无法更改表中动态追加的行的样式?
您需要委派事件:
这种方式错了:
$(".el").bind('mouseenter keypress','.el', function(e) {
在您的情况下,您需要:
$(document).on('mouseleave', '.el', handler);
$(document).on('mouseenter keypress', '.el', function(e) {...
有关详细信息,请查看SO doc
ID必须是唯一的。这意味着您可以获取最后一个数值并将其递增...
摘录:
$(document).ready(function(){
$("#b1").click(function(){
var lastIdidx = +$('#t1 tr:last td[id]:last').attr('id').substr(1);
$('#t1 > tbody:last-child').append('<tr id = "r"><td id = "d' + (lastIdidx + 1) + '" class = "el" contenteditable="true"></td>' +
'<td id = "d' + (lastIdidx + 2) + '" class = "el" contenteditable="true"></td>' +
'<td id = "d' + (lastIdidx + 3) + '" class = "el" contenteditable="true"></td>' +
'<td id = "d' + (lastIdidx + 4) + '" class = "el" contenteditable="true"></td>' +
'<td><button id ="del' + (lastIdidx + 5) + '">Delete</button></td></tr>');
});
$("#t1").on('click','#del1',function(){
$(this).parent().parent().remove();
});
function handler(ev) {
var target = $(ev.target);
var elId = target.attr('id');
if( target.is(".el") ) {
$(this).css("background-color","white");
$(this).css("color","black");
}
}
$(document).on('mouseleave', '.el', handler);
$(document).on('mouseenter keypress', '.el', function(e) {
if (e.altKey) {
$(this).css("background-color","blue");
$(this).css("color","red");
}
});
});
&#13;
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="table1">
<button id="b1">Add new Row</button>
<table id="t1" align="center" border=1>
<tr>
<th>First Name</th>
<th>Last Name</th>
<th>Email Address</th>
<th>Telephone Number</th>
</tr>
<tr id="r">
<tbody>
<td id="d1" class="el" contenteditable="true"></td>
<td id="d2" class="el" contenteditable="true"></td>
<td id="d3" class="el" contenteditable="true"></td>
<td id="d4" class="el" contenteditable="true"></td>
<td>
<button id="del1">Delete</button>
</td>
</tbody>
</tr>
</table>
</div>
&#13;