[英]Animate dynamically created elements?
我目前正在创建一个待办事项清单,但有一个主意,但我不知道如何实现。
当我将项目添加到列表中时,我希望它们成为.fadeIn('slow'),但我不确定如何实现! 我知道如何$('ul')。fadeIn('slow'),但是当调用todoList.addListHTML()函数时,是否有办法使动画发生?
我最初有:
$('ul').fadeIn('slow')
显然,这是行不通的,因为页面加载时ul不存在。
这是代码,现在这很仓促,没有重构或其他任何东西:
let ul = document.createElement('ul');
ul.id = "todoList";
let todoList = {
todos: ['item 1', 'item 2', 'item 3'],
displayTodos: function(){
console.log(this.todos);
},
changeTodo: function(position, newValue){
this.todos[position] = newValue;
this.displayTodos();
},
addTodo: function(todo){
let unList = document.getElementById('todoList');
let li = document.createElement('li');
let span = document.createElement('span');
span.textContent = todo;
li.appendChild(span);
ul.appendChild(li);
document.body.appendChild(ul);
this.displayTodos();
},
removeTodos: function(position, endRemove){
this.todos.splice(position, endRemove);
this.displayTodos();
},
doubleList: function(){
let newArr = [];
let arrSize = this.todos.length;
console.log(newArr);
for(let i = 0; i < arrSize; i++){
newArr.push(this.todos[i]);
this.todos.push(newArr[i]);
}
this.displayTodos();
},
addListToHTML(){
document.body.appendChild(ul);
console.log(document.body.children);
for(let i = 0; i < this.todos.length; i++){
let li = document.createElement('li');
let span = document.createElement('span');
span.textContent = this.todos[i];
li.appendChild(span);
ul.appendChild(li);
}
},
clearList: function(){
document.body.removeChild(ul);
}
};
我对JQuery不太熟悉,因此可能有更好的方法来做到这一点。 但是,只要我需要设置动画,就可以切换类。 因此,当您添加每一项时,您希望将其淡入淡出,应将不透明度从0更改为1。
var todoList = ['item1', 'item2', 'item3']; var newElement; $('#add-list-items').on('click', function() { var nextNumber = $('#to-do-list li').length + 1; var newHTML = '<li class="Loading">' + 'Item ' + nextNumber + '</li>'; newElement = $(newHTML).appendTo('#to-do-list'); $(newElement).addClass('Loaded'); });
.Loading { opacity: 0; -webkit-animation: fadeout .5s ease-in; -moz-animation: fadeout .5s ease-in; -o-animation: fadeout .5s ease-in; animation: fadeout .5s ease-in; } .Loaded { opacity: 1; -webkit-animation: fadein 1s ease-in; -moz-animation: fadein 1s ease-in; -o-animation: fadein 1s ease-in; animation: fadein 1s ease-in; } @keyframes fadein { from { opacity:0; } to { opacity:1; } } @-moz-keyframes fadein { from { opacity:0; } to { opacity:1; } } @-webkit-keyframes fadein { from { opacity:0; } to { opacity:1; } } @-o-keyframes fadein { from { opacity:0; } to { opacity:1; } }
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script> <ul id="to-do-list"> </ul> <input type="button" id="add-list-items" value="Add Items">
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