javascript - JavaScript 中使用输入的类别
问题描述
如何将输入中的“任务”划分为类别?过滤后的画廊很好,我在 W3school 上找到了很多教程,但我没有找到如何从直接输入中添加它们的任何地方,可能使用 option-id。
filterSelection("all")
function filterSelection(c) {
var x, i;
x = document.getElementsByClassName("filterDiv");
if (c == "all") c = "";
for (i = 0; i < x.length; i++) {
w3RemoveClass(x[i], "show");
if (x[i].className.indexOf(c) > -1) w3AddClass(x[i], "show");
}
}
function addClass(element, name) {
var i, arr1, arr2;
arr1 = element.className.split(" ");
arr2 = name.split(" ");
for (i = 0; i < arr2.length; i++) {
if (arr1.indexOf(arr2[i]) == -1) {
element.className += " " + arr2[i];
}
}
}
function removeClass(element, name) {
var i, arr1, arr2;
arr1 = element.className.split(" ");
arr2 = name.split(" ");
for (i = 0; i < arr2.length; i++) {
while (arr1.indexOf(arr2[i]) > -1) {
arr1.splice(arr1.indexOf(arr2[i]), 1);
}
}
element.className = arr1.join(" ");
}
// Add active class to the current button (highlight it)
var btnContainer = document.getElementById("myBtnContainer");
var btns = btnContainer.getElementsByClassName("btn");
for (var i = 0; i < btns.length; i++) {
btns[i].addEventListener("click", function() {
var current = document.getElementsByClassName("active");
current[0].className = current[0].className.replace(" active", "");
this.className += " active";
});
}
<form id="FORM">
<label for="jmeno">Assigned task</label>
<input type="text" id="homework" required />
<label for="category">Category</label>
<select name="selectCategory" id="category">
<option value="">---</option>
<option value="School" id="school">School</option>
<option value="Work" id="work">Work</option>
</select>
<input type="submit" value="Add" />
</form>
<h2>TASK TO</h2>
<div id="myBtnContainer">
<button class="btn active" onclick="filterSelection('all')"> All</button>
<button class="btn" onclick="filterSelection('school')"> To school</button>
<button class="btn" onclick="filterSelection('work')"> To work</button>
</div>
解决方案
像这样的东西应该工作。
let taskForm = document.tasks;
taskForm.onsubmit = e => {
e.preventDefault();
let taskData = new FormData(taskForm);
let category = taskData.get("category");
let result = document.querySelector(".tasks");
let task = document.createElement('div');
let filterTask = document.querySelector('input[name="filter"]:checked');
task.appendChild(document.createTextNode(taskData.get("task")));
task.dataset.group = category;
task.classList.add("task");
task.style.display = ["all", category].includes(filterTask.value) ? "block" : "none";
result.appendChild(task);
}
let showTasks = document.getElementsByName("filter");
showTasks.forEach(el => {
el.addEventListener("click", e => {
tasks = document.querySelectorAll(".task");
tasks.forEach(task => {
task.style.display = ["all", task.dataset.group].includes(e.target.value) ? "block" : "none";
});
});
});
input[type="radio"] {
opacity: 0;
position: fixed;
width: 0;
}
input[type="radio"] ~ label {
display: inline-block;
background-color: #ddd;
padding: 5px 20px;
font-family: sans-serif, Arial;
font-size: 16px;
border: 2px solid #444;
border-radius: 4px;
}
input[type="radio"] ~ label:hover {
background-color: #dfd;
}
input[type="radio"]:checked + label {
background-color: #bfb;
border-color: #4c4;
}
<div>
<form name="tasks">
<label for="name">Assigned Task</label>
<input name="task" type="text" required />
<label for="category">Category</label>
<select name="category">
<option value="school" selected>School</option>
<option value="work">Work</option>
</select>
<input type="submit" value="Add" />
</form>
<h3>Task To</h3>
<input name="filter" id="all" type="radio" value="all" checked />
<label for="all">All</label>
<input name="filter" id="school" type="radio" value="school" />
<label for="school">School</label>
<input name="filter" id="work" type="radio" value="work" />
<label for="work">Work</label>
<h2>Tasks</h2>
<div class="tasks"></div>
</div>
您可以使用 CSS 中的选择器为添加的任务设置.task
样式。
请注意,如果您想在显示和隐藏任务时制作动画,请考虑使用opacity
和属性,而不是更改显示visibility
属性。
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