我是JS的新手,我真的需要你的帮助! 我正在研究简单的Todo列表应用程序。 我的Html是
<div class="centerer">
<div class="title">
TODO List
</div>
<form>
<label>
<input id="new-task-input" type="text" placeholder="TODO">
</label>
<button type="button" id="add-task-button">
Add
</button>
</form>
<ul id="todolist-container">
<li class="task">
<label><input type="checkbox" class="checkbox">
Default Test Value
<input type="button" class="delete-btn" value="X">
</label>
</li>
</ul>
<input type="button" id="delete-all" value="Delete All" onclick="wantDelete()">
<script type="text/template" id="list-item-template">
<li class="task">
<label>
<input type="checkbox" class="checkbox">
<span class="checkbox-custom"></span>
<span class="task-name label"><!-- TODO --></span>
<input type="button" class="delete-btn" value="X">
</label>
</li>
</script>
<script type="text/template" id="list-item-template-completed">
<li class="task">
<label>
<input type="checkbox" class="checkbox">
<span class="checkbox-custom"></span>
<span class="task-name label completed"><!-- TODO --></span>
<input type="button" class="delete-btn" value="X">
</label>
</li>
</script>
复选框有点用“标签”帮助装饰。
app的主要思想是: - 添加新Todo(好吧) - 按“x”按钮删除待办事项(也可以) - 如果任务完成,在“复选”后出现直线装饰(也很好) 所有信息也应存储在localstorage中(也可以)。
但重新加载页面后,复选框的状态不会保存。只保存装饰状态。
我的JS是
window.Todo = {
addTaskButton: document.getElementById("add-task-button"),
newTaskInput: document.getElementById("new-task-input"),
container: document.getElementById("todolist-container"),
template: document.getElementById("list-item-template").innerText,
templateCompleted: document.getElementById("list-item-template-completed").innerText,
setup: function() {
Todo.addTaskButton.addEventListener('click', Todo.onAddTaskClicked);
Todo.container.addEventListener('click', Todo.onTodolistClicked);
Todo.renderTasks();
},
onAddTaskClicked: function() {
var taskName = Todo.newTaskInput.value;
Todo.newTaskInput.value = "";
var taskHTML = Todo.template.replace("<!-- TODO -->", taskName);
Todo.container.insertAdjacentHTML('afterbegin', taskHTML);
Todo.saveTask(taskName, false);
},
onTodolistClicked: function(event) {
var targetElement = event.toElement;
if(targetElement.className !== "delete-btn"){
while (!targetElement.classList.contains("task")) {
targetElement = targetElement.parentElement;
}
var checkbox = targetElement.querySelector(".checkbox");
var toLineThrough = targetElement.querySelector(".task-name");
if (checkbox.checked) {
toLineThrough.classList.add("completed");
} else {
toLineThrough.classList.remove("completed");
}
var taskNameElement = targetElement.querySelector(".task-name");
var taskName = taskNameElement.innerText;
Todo.saveTask(taskName, checkbox.checked);
}
else{
while (!targetElement.classList.contains("task")) {
targetElement = targetElement.parentElement;
}
var taskNameElement = targetElement.querySelector(".task-name");
var taskName = taskNameElement.innerText;
localStorage.removeItem(taskName);
window.location.reload(true);
}
},
saveTask: function(name, isCompleted) {
window.localStorage.setItem(name, JSON.stringify(isCompleted));
},
renderTasks: function() {
for (var i = 0; i < window.localStorage.length; i++) {
var taskName = window.localStorage.key(i);
var isCompleted = JSON.parse(window.localStorage.getItem(taskName)) === "true";
var taskHTML = Todo.template.replace("<!-- TODO -->", taskName);
if (!isCompleted) {
Todo.container.insertAdjacentHTML('afterbegin', taskHTML);
}
else {
var taskName1 = window.localStorage.key(i);
var taskHTML1 = Todo.templateCompleted.replace("<!-- TODO -->", taskName1);
Todo.container.insertAdjacentHTML('afterbegin', taskHTML1);
}
}
}
}
Todo.setup();
function wantDelete() {
localStorage.clear();
window.location.reload(true);
}
也许有人可以帮忙如何保存复选框状态? 我知道渲染功能并不好,因为采用了2个不同的模板,但我的大脑可以重现那个......
请你帮忙!
答案 0 :(得分:0)
我的主张是将特定字段的值保存到localstorage
localStorage.setItem(&#39; male&#39;,&#39; true&#39;); 阅读更多关于Localstorage的信息。