How TO - Een takenlijst maken
Leer hoe u een "takenlijst" maakt met CSS en JavaScript.
De takenlijst
Gebruik CSS en JavaScript om een "takenlijst" te maken om uw taken te ordenen en te prioriteren.
Maak de takenlijst
Stap 1) HTML toevoegen:
Voorbeeld
<div id="myDIV" class="header">
<h2>My To Do List</h2>
<input type="text" id="myInput" placeholder="Title...">
<span
onclick="newElement()" class="addBtn">Add</span>
</div>
<ul id="myUL">
<li>Hit
the gym</li>
<li class="checked">Pay bills</li>
<li>Meet George</li>
<li>Buy eggs</li>
<li>Read a
book</li>
<li>Organize office</li>
</ul>
Stap 2) CSS toevoegen:
Stijl de koptekst en de lijst:
Voorbeeld
/* Include the padding and border in an element's total width and height */
* {
box-sizing: border-box;
}
/* Remove margins and padding from the list */
ul {
margin: 0;
padding: 0;
}
/* Style the list
items */
ul li {
cursor: pointer;
position: relative;
padding: 12px 8px 12px 40px;
background: #eee;
font-size: 18px;
transition: 0.2s;
/*
make the list items unselectable */
-webkit-user-select: none;
-moz-user-select: none;
-ms-user-select: none;
user-select: none;
}
/* Set all odd list items to a different
color (zebra-stripes) */
ul
li:nth-child(odd) {
background: #f9f9f9;
}
/* Darker background-color on hover */
ul li:hover {
background: #ddd;
}
/* When
clicked on, add a background color and strike out text */
ul
li.checked {
background: #888;
color: #fff;
text-decoration: line-through;
}
/* Add a "checked" mark when clicked on */
ul li.checked::before {
content: '';
position: absolute;
border-color: #fff;
border-style: solid;
border-width: 0 2px 2px 0;
top: 10px;
left: 16px;
transform: rotate(45deg);
height: 15px;
width: 7px;
}
/* Style the close button */
.close {
position: absolute;
right: 0;
top: 0;
padding: 12px 16px 12px 16px;
}
.close:hover {
background-color: #f44336;
color: white;
}
/* Style the header */
.header {
background-color: #f44336;
padding: 30px 40px;
color: white;
text-align: center;
}
/* Clear floats after the header */
.header:after {
content: "";
display: table;
clear: both;
}
/* Style the input */
input {
margin: 0;
border: none;
border-radius: 0;
width: 75%;
padding: 10px;
float: left;
font-size: 16px;
}
/* Style the "Add" button */
.addBtn {
padding: 10px;
width: 25%;
background: #d9d9d9;
color: #555;
float: left;
text-align: center;
font-size: 16px;
cursor: pointer;
transition: 0.3s;
border-radius: 0;
}
.addBtn:hover {
background-color: #bbb;
}
Stap 3) JavaScript toevoegen:
Voorbeeld
// Create a "close" button and append it to each list item
var myNodelist = document.getElementsByTagName("LI");
var i;
for (i =
0; i < myNodelist.length; i++) {
var span = document.createElement("SPAN");
var txt = document.createTextNode("\u00D7");
span.className = "close";
span.appendChild(txt);
myNodelist[i].appendChild(span);
}
// Click on a close button to hide the current list item
var
close = document.getElementsByClassName("close");
var i;
for (i =
0; i < close.length; i++) {
close[i].onclick = function() {
var div =
this.parentElement;
div.style.display = "none";
}
}
// Add a "checked" symbol when clicking on a list item
var list
= document.querySelector('ul');
list.addEventListener('click', function(ev)
{
if (ev.target.tagName === 'LI') {
ev.target.classList.toggle('checked');
}
}, false);
// Create a new list item when clicking on the "Add"
button
function newElement() {
var li =
document.createElement("li");
var inputValue = document.getElementById("myInput").value;
var t = document.createTextNode(inputValue);
li.appendChild(t);
if (inputValue
=== '') {
alert("You must write something!");
} else {
document.getElementById("myUL").appendChild(li);
}
document.getElementById("myInput").value = "";
var span =
document.createElement("SPAN");
var txt = document.createTextNode("\u00D7");
span.className = "close";
span.appendChild(txt);
li.appendChild(span);
for (i = 0; i < close.length; i++) {
close[i].onclick = function() {
var div = this.parentElement;
div.style.display = "none";
}
}
}