删除已点击的< li>的onclick [英] Remove clicked <li> onclick
问题描述
我有这个JavaScript代码：
I have this JavaScript code:
window.onload = init;
function init () {
var button = document.getElementById("submitButton");
button.onclick = addItem;
var listItems = document.querySelectorAll("li"); //assigning the remove click event to all list items
for (var i = 0; i < listItems.length; i++) {
listItems[i].onclick = li.parentNode.removeChild(li);
}
}
function addItem() {
var textInput = document.getElementById("item"); //getting text input
var text = textInput.value; //getting value of text input element
var ul = document.getElementById("ul"); //getting element <ul> to add element to
var li = document.createElement("li"); //creating li element to add
li.innerHTML = text; //inserting text into newly created <li> element
if (ul.childElementCount == 0) { //using if/else statement to add items to top of list
ul.appendChild(li); // will add if count of ul children is 0 otherwise add before first item
}
else {
ul.insertBefore(li, ul.firstChild);
}
}
function remove(e) {
var li = e.target;
var listItems = document.querySelectorAll("li");
var ul = document.getElementById("ul");
li.parentNode.removeChild(li);
}
此HTML：
<body>
<form>
<label for="item">Add an item: </label>
<input id="item" type="text" size="20"><br>
<input id="submitButton" type="button" value="Add!">
</form>
<ul id="ul">
</ul>
<p>
Click an item to remove it from the list.
</p>
</body>
我要做的是删除< li> 元素，但这似乎不起作用，我无法在这个特定场景的其他任何地方找到答案。希望有人可以帮助我，告诉我我缺少的东西。
What I want to do is remove the whichever <li> element the user clicks, but this doesn't seem to be working and I am unable to find an answer anywhere else online for this specific scenario. Hoping someone can help me out here and show me what i am missing.
推荐答案
更新
UPDATE
普通JS委托
将eventListener添加到UL甚至在动态插入的LI上委托点击：
Add the eventListener to the UL to delegate the click even on dynamically inserted LIs:
document.getElementById("ul").addEventListener("click",function(e) {
var tgt = e.target;
if (tgt.tagName.toUpperCase() == "LI") {
tgt.parentNode.removeChild(tgt); // or tgt.remove();
}
});
jQuery委托
$(function() {
$("#submitButton").on("click",function() {
var text = $("#item").val(); //getting value of text input element
var li = $('<li/>').text(text)
$("#ul").prepend(li);
});
$("#ul").on("click","li",function() {
$(this).remove();
});
});
原始回答
Original answer
由于你没有提到jQuery
Since you did not mention jQuery
var listItems = document.getElementsByTagName("li"); // or document.querySelectorAll("li");
for (var i = 0; i < listItems.length; i++) {
listItems[i].onclick = function() {this.parentNode.removeChild(this);}
}
您可能希望将其包装在
window.onload=function() { // or addEventListener
// do stuff to the DOM here
}
重新阅读我认为你也想将其添加到动态LI的问题
Re-reading the question I think you also want to add that to the dynamic LIs
li.innerHTML = text; //inserting text into newly created <li> element
li.onclick = function() {
this.parentNode.removeChild(this);
// or this.remove(); if supported
}
这是完整的代码，因为我希望你能用它编码
Here is the complete code as I expect you meant to code it
window.onload=function() {
var button = document.getElementById("submitButton");
button.onclick = addItem;
}
function addItem() {
var textInput = document.getElementById("item"); //getting text input
var text = textInput.value; //getting value of text input element
var ul = document.getElementById("ul"); //getting element <ul> to add element to
var li = document.createElement("li"); //creating li element to add
li.innerHTML = text; //inserting text into newly created <li> element
li.onclick = function() {
this.parentNode.removeChild(this);
// or this.remove(); if supported
}
if (ul.childElementCount == 0) { //using if/else statement to add items to top of list
ul.appendChild(li); // will add if count of ul children is 0 otherwise add before first item
}
else {
ul.insertBefore(li, ul.firstChild);
}
}
如果你想使用jQuery，整个事情变得更简单
In case you want to use jQuery, the whole thing gets somewhat simpler
$(function() {
$("#submitButton").on("click",function() {
var text = $("#item").val(); //getting value of text input element
var li = $('<li/>')
.text(text)
.on("click",function() { $(this).remove()});
$("#ul").prepend(li);
});
});
这篇关于删除已点击的< li>的onclick的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
