Menu
I am using jQuery to try and find which IDs have a certain class name. The reason this is important to me is I am using toggleClass() from jQuery to show and hide certain divs and when a button is selected I want a viewport to display or hide. I have 2 personal goals: One is to find a way to do this in jquery and the other is to understand how to do this in javascript. I understand the javascript will be much more advanced and I am prepared.
Just so there is no question I added the code. Lets start by looking at my personal hosted web page called CodeAmend and here is the code
****html***
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Code Player</title>
<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.2/jquery.min.js"></script>
<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jqueryui/1.11.4/jquery-ui.min.js"></script>
<link rel="stylesheet" href="https://ajax.googleapis.com/ajax/libs/jqueryui/1.11.4/themes/smoothness/jquery-ui.css">
<link rel="stylesheet" href="style.css" />
</head>
<body>
<div id="wrapper">
<div id="header">
<p>CodePlayer</p>
<nav>
<ul>
<li id="html-button" class="toggle selected no-highlight">HTML</li>
<li id="css-button" class="toggle selected no-highlight">CSS</li>
<li id="js-button" class="toggle selected no-highlight">JS</li>
<li id="result-button" class="toggle selected no-highlight">Result</li>
</ul>
</nav>
<div id="run-button" class="no-select">Run</div>
</div>
<div id="html-container" class="code-container">
<div class="code-label">HTML</div>
<textarea>Code</textarea>
</div>
<div id="css-container" class="code-container">
<div class="code-label">CSS</div>
<textarea>Code</textarea>
</div>
<div id="js-container" class="code-container">
<div class="code-label">JS</div>
<textarea>Code</textarea>
</div>
<div id="result-container" class="code-container">
<div class="code-label">Result</div>
<iframe>Code</iframe>
</div>
</div>
<script type="text/javascript" src="script.js"></script>
</body>
</html>
* here is javascript / jquery *
$("[id^=button]").click(function () {
$(this).toggleClass('selected');
// creates the name of a viewport ID. "view-" + html of button
var viewID = "#view-" + $(this).html();
$(viewID).toggle();
resetViewport(4);
});
function resetViewport(numberOfViewports) {
var viewSize;
switch (numberOfViewports) {
case 1:
viewSize = "400px";
break;
case 2:
viewSize = "198px";
break;
case 3:
viewSize = "131px";
break;
case 4:
viewSize = "98px";
break;
}
$("[id^=view]").css("width", viewSize);
}
here is css
* {
margin: 0;
padding: 0;
}
body {
font-size: 14px;
}
.clear-fix {
clear: both;
}
.no-highlight {
-webkit-touch-callout: none;
-webkit-user-select: none;
-khtml-user-select: none;
-moz-user-select: none;
-ms-user-select: none;
user-select: none;
}
/* why does menu margin excape parent without padding on container.. change to 0 and all margen excapes. */
#container {
width: 400px;
height: 456px;
margin: 0 auto;
padding-top: 1px;
background-color: #555;
border-radius: 5px;
}
/* Menu styling */
#menu {
width: 231px;
margin: 10px auto;
}
#menu li {
width: 50px;
height: 30px;
border: 2px solid #58d;
border-radius: 10px;
background-color: #000;
color: #333;
line-height: 30px;
text-align: center;
font-size: .8em;
text-transform: uppercase;
list-style: none;
float: left;
cursor: pointer;
}
#menu li+li {
margin-left: 5px;
}
#menu .selected {
background-color: #fff;
color: #333;
font-weight: bold;
}
[id^="view"] {
width: 98px;
height: 400px;
margin: 1px;
float: left;
background-color: #ddd;
}
648
To count all HTML elements, we use length property. The length property is used to count number of the elements of the jQuery object.
The class interval is the difference between the upper class limit and the lower class limit. For example, the size of the class interval for the first class is 30 – 26 = 4. Similarly, the size of the class interval for the second class is 31 – 35 = 4.
jQuery collections and Javascript NodeLists are both array-like, so you can use the .length property to get the number of elements.
jQuery:
resetViewport($(".selected").length);
Plain Javascript:
resetViewport(document.getElementsByClassName("selected").length);
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With
