Greetings fellow Stackoverflowers. I am trying to have text, images, and colors change with a single click of a button using JavaScript. Is there any efficient way to do this? Here is My example Website. I am trying to have the Edward Snowden's image, description, and list change with a single button then revert to the original when clicked again! Thanks for the help!
It is actually rather simple to do this. Here is an example of what to do and how:
<!DOCTYPE html>
<html>
<body>
<img id="image" src="image1.gif">
<p id="text">Old text</p>
<button onclick="change()">Click Me</button>
<script>
function change() {
document.getElementById("image").src = "image2.jpg";
document.getElementById("text").innerHTML = "new text";
}
</script>
</body>
</html>
You declare elements with IDs and make a button with an onclick event. When the button is clicked, it will run the change() function, which will change image's src to image2.jpg and text's text to new text.
If you want it to change back, you could try something like this:
<!DOCTYPE html>
<html>
<body>
<img id="image" src="image1.gif">
<p id="text">Old text</p>
<button onclick="change()">Click Me</button>
<script>
var element1;
var element2;
function change() {
element1 = document.getElementById("image")
element2 = document.getElementById("text")
if ( element1.src == "image2.jpg" ) {
element1.src = "image1.gif"
element2.innerHTML = "Old text"
} else {
element1.src = "image2.jpg"
element2.innerHTML = "new text"
}
}
</script>
</body>
</html>
This method is for Jquery.
$(document).on('click', '.btn-color1', function(){
$(this).addClass('btn-color2');
$('.container').addClass('changecolor2');
});
$(document).on('click', '.btn-color2', function(){
$(this).removeClass('btn-color1');
$('.container').removeClass('changecolor2');
$('.container').addClass('changecolor3');
});
<style>
.btn-color1{
color: #fff;
background-color: red;
padding: 10px;
}
.btn-color2{
color: #fff;
background-color: blue;
padding: 10px;
}
.changecolor2{
background-color: blue;
}
</style>
Related
Overview of the code: This code consists of an editable div section. Below the div, there is a button which creates a span element, inserts the text "tag" in the span element and finally appends the span element in that editable div
<!DOCTYPE html>
<html>
<head>
<title></title>
<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<style type="text/css">
#sample-div
{
border-style: solid;
border-width: 1px;
border-color: black;
height:100px;
overflow: auto;
}
</style>
<script type="text/javascript">
function addTags()
{
var tag = document.createElement("span");
tag.className = "$(tag)"
tag.innerHTML = "tag";
tag.contentEditable = false;
$('#sample-div').append(tag);
}
$(document).ready(function(){
$('span').keyup(function(){
if(!this.value)
{
alert('this is empty');
}
});
});
</script>
</head>
<body>
<div id="sample-div" contenteditable="true"></div>
<input type="button" value="date" id="sample-tags" onclick="addTags()">
</body>
</html>
General observation: When I type something inside the div and then click on the button, the HTML DOM will change as:
<div id="sample-div" contenteditable="true">
this is a <span class="$(tag)" contenteditable="false">tag</span>
</div>
Please note that the text "this is a", is provided by me when I type inside the div element. "tag" appears when I click on the input button
Expectation / Trying to achieve: When I delete the text in the span, the DOM will change as:
<div id="sample-div" contenteditable="true">
this is a
</div>
So, my aim is to get the information that the element span is removed when I delete the text in span. I am trying to achieve that by doing the following, which is not correct:
$(document).ready(function(){
$('span').keyup(function(){
if(!this.value)
{
alert('this is empty');
}
});
});
So, my question is how do I get the message "this is empty" when the DOM removes the span element?
You could use a variable as a "tag" counter.
When the amount tags present in the div gets lower than the tag counter, that is when one got deleted.
var tagCount = 0;
function addTags(){
var tag = document.createElement("span");
tag.className = "$(tag)"
tag.innerHTML = "tag";
tag.contentEditable = false;
$('#sample-div').append(tag);
// Increment tagCount
tagCount++;
}
$(document).ready(function(){
$('#sample-div').keyup(function(){
if($(this).find("span").length < tagCount){
alert('One tag was removed');
// Decrement tagCount
tagCount--;
}
});
}); // Ready
#sample-div{
border-style: solid;
border-width: 1px;
border-color: black;
height:100px;
overflow: auto;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div id="sample-div" contenteditable="true"></div>
<input type="button" value="date" id="sample-tags" onclick="addTags()">
You probably should use MutationObserver
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8" />
<title></title>
<style type="text/css">
#sample-div
{
border-style: solid;
border-width: 1px;
border-color: black;
height:100px;
overflow: auto;
}
</style>
</head>
<body>
<div id="sample-div" contenteditable="true"></div>
<input type="button" value="date" id="sample-tags" onclick="addTags()">
<script type="text/javascript">
'use strict';
function addTags()
{
var tag = document.createElement("span");
tag.className = "$(tag)"
tag.innerHTML = "tag";
tag.contentEditable = false;
document.getElementById('sample-div').appendChild(tag);
}
function onTagRemoved(node)
{
alert(`node ${node.tagName}.${node.className} removed`);
}
//
// https://developer.mozilla.org/en-US/docs/Web/API/MutationObserver
//
// select the target node
let target = document.querySelector('#sample-div');
// create an observer instance
let observer = new MutationObserver(function(mutations) {
mutations.forEach(function(mutation) {
// console.log(mutation);
let node = null;
for (var i = 0; i < mutation.removedNodes.length; i++) {
node = mutation.removedNodes[i];
if (/span/i.test(node.tagName)) {
onTagRemoved(node);
}
}
});
});
// configuration of the observer:
let config = { attributes: false, childList: true, characterData: false }
// pass in the target node, as well as the observer options
observer.observe(target, config);
// later, you can stop obser
// observer.disconnect();
</script>
</body>
</html>
Tested on Firefox 52
As a newbie to Javascript, I don't find the language easy. The code below fades between two divs. During the fade, I would like to change the contents of each div. While I can successfully update CSS parameters, I have been unable to update the content. Perhaps somebody can help:
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js"></script>
<html>
<head>
<style type='text/css' media='screen, print'>
#cycler {
position: relative;
}
#cycler div {
position: absolute;
z-index: 1;
background-color: white
}
#cycler div p {
font-size: 60px;
color: black;
margin: 0;
}
#cycler div.active {
z-index: 3
}
#cycler img {
display: block
}
</style>
<script type='text/javascript'>
$(window).load(function() {
setInterval('divCycler()', 3000);
});
function divCycler(e) {
var $active = $('#cycler .active');
var $next = ($active.next().length > 0) ? $active.next() : $('#cycler div:first');
$next.css('z-index', 2);
$active.fadeOut(1500, function() {
$active.css('z-index', 1).show().removeClass('active');
$active.innerHTML = "New HTML Text"; // This Line is not working !!!!!!!!!!!
$active.css('background-color', 'red');
$next.css('z-index', 3).addClass('active');
});
}
</script>
</head>
<body>
<div class='container'>
<div id='cycler'>
<div id='div1' class='active'>
<p>Test Message 1</p>
</div>
<div id='div2'>
<p>Test Message 2</p>
</div>
</div>
</div>
</body>
</html>
I have shown the complete HTML page including all the Javascript; there is no other code to this. Any help on the issue would be appreciated.
$active.innerHTML = "New HTML Text"; // This Line is not working !!!!!!!!!!!
is because $active is a jQuery object, not a DOM element, to solve your problem use:
$active[0].innerHTML = "New HTML Text";
or, with jQuery itself:
$active.html("New HTML Text");
Use .html() instead of innerHTML
$active.html("New HTML Text"); // This Line is not working
jQuery Documentation: html()
This is inside my CSS:
div.hide {
display:none;
}
div.show {
color: #66CCFF;
}
This is in my HTML:
16:10
<script language="JavaScript">
function showText(show,hide)
{
document.getElementById(show).className = "show";
document.getElementById(hide).className = "hide";
}
</script>
<a name="16:10" onclick="showText('text1')" href="javascript:void(0);"></a>
<div id="text1" class="hide">This is your monitors aspect ratio.</div>
I'm trying to make the first link display the "This is your monitors aspect ratio." text lower on the page.
Any help is much appreciated.
Pure CSS Answer
Ok, if you just want to append text after you have moved to a position in a page using an anchor tag, you could do it with nothing but CSS similar to the following:
a:target:after{
content: " Test";
background-color: #ccffcc;
}
What this does is appends the text "Test" after the active anchor and colors. Here is an example page with implementation:
<!DOCTYPE html>
<html>
<head>
<title>Link Printer 2</title>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width">
<style>
a:target:after{
content: " Test";
background-color: #ccffcc;
}
.bigSection{
height: 200px;
}
</style>
</head>
<body>
<div class="bigSection">
<div><a name="first">First</a></div>
<div>To First</div>
<div>To Second</div>
<div>To Third</div>
</div>
<div class="bigSection">
<div><a name="second">Second</a></div>
<div>To First</div>
<div>To Second</div>
<div>To Third</div>
</div>
<div class="bigSection">
<div><a name="third">Third</a></div>
<div>To First</div>
<div>To Second</div>
<div>To Third</div>
</div>
</body>
</html>
Answer using JavaScript
You need to bind an eventListener and prevent it from moving to the next page. Here is a way to do it with JavaScript or CSS. The JavaScript way will actually set the text to whatever you want. The CSS way will hide actually hide the element.
<!DOCTYPE html>
<html>
<head>
<title>Link Printer</title>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width">
<style>
.hide{
display: none;
}
</style>
<script>
function jsShowText(event) {
var divToManip = document.getElementById("text");
if (divToManip.innerHTML === "") {
divToManip.innerHTML = "Hello";
}
else {
divToManip.innerHTML = "";
}
event.preventDefault();
}
function cssShowText(event) {
var divToManip = document.getElementById("text");
if (divToManip.className === "") {
divToManip.className = "hide";
}
else {
divToManip.className = "";
}
event.preventDefault();
}
function setListeners() {
document.getElementById("jsPrinter").addEventListener("click", jsShowText, false);
document.getElementById("cssPrinter").addEventListener("click", cssShowText, false);
}
window.onload = setListeners;
</script>
</head>
<body>
<div><a id="jsPrinter" href="" onclick="showText();">Click With JavaScript</a></div>
<div><a id="cssPrinter" href="" onclick="showText();">Click With CSS</a></div>
<div id="text">I'm text</div>
</body>
</html>
"showText" must receive an id parameter to be used with the call to "document.getElementById"
Try this, just 1 link that will display the text below after click:
<a name="16:10" onclick="showText('text1')" href="javascript:void(0);">16:10</a>
<script language="JavaScript">
function showText(id)
{
document.getElementById(id).style.display = "block";
}
</script>
<div id="text1" style="display:none;">This is your monitors aspect ratio.</div>
I'm just using style display to hide/show the element. Hope it helps.
just change your css like this:
div.show {
display:block;
color: #66CCFF;
}
Here I am going to provide an example with something that I was working, thank you Alberto Montellano for the example, that gave me an idea, however what was required at the end was something a little different, with the option not to show the data and display it only when I click and make it disappear when click again. In this example I am going to give you two options; you can have a button or a link to trigger the JS function to display and hide the body text, you can choose if you want the button or link that is way I put a comment (optional), both behave as the same, it is up to you which one you want to use.
<!DOCTYPE html>
<html>
<head>
<!-- CSS -->
<style>
#myDIV {
width: 100%;
padding: 50px 0;
text-align: center;
background-color: lightblue;
margin-top:20px;
}
</style>
</head>
<body>
<!-- text before the button or link -->
<p>Click the "PIN" button (or link) to display PIN options:</p>
<!-- The Pin button (optional) -->
<button type="button" onclick="myFunction()">PIN button:</button>
<!-- The Pin link (optional) -->
</br></br></br>
<a onclick="myFunction()" href="javascript:void(0);">PIN link:</a>
<!--Data will display or hide (toggle)-->
<div id="myDIV"style="display:none;">
These are the steps to get your PIN number: Bla bla bla.
</div>
<p><b>Note:</b> The text display when you click the button or link will take space, if you click again will be toggle.</p>
<!-- JS -->
<script>
function myFunction() {
var x = document.getElementById('myDIV');
if (x.style.display === 'none') {
x.style.display = 'block';
} else {
x.style.display = 'none';
}
}
</script>
</body>
</html>
http://jsfiddle.net/TDmRv/1/
What I want to do: I want the div with the id "theDiv" to be wrapped around the text that gets inputted onto the page. I want this so the text will appear in multiple divs that are created.
Explained more:
Okay, so what I am trying to do is type some input in and have it display with in a div- that works fine, but I want the div to wrap around it when I click input. So every time I click "add" the text gets wrapped into a div and is displayed. BUT I am also trying to make this appear multiple times, so every time I add input the div is wrapped around the text. Finally I am trying to have those two buttons placed into there, I assume those would have to be inserted when "add" is clicked with jQuery. I just need some guidance because I am struggling to comprehend how this will work.
<!DOCTYPE html>
<html>
<head>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js"></script>
<script type="text/javascript" src="jquery.js"></script>
<script type="text/javascript">
$(document).ready(function(){
$("#edit").click(function(){
$("#theDiv").css("background-color","red");
});
});
$(document).ready(function(){
$("#delete").click(function(){
$("#theDiv").remove();
});
});
$(document).ready(function(){
$("#add").click(function(){
$('#edit').wrap('<div class="theDiv" />');
});
});
</script>
<style>
#theDiv {
border: 1px solid rgb(204, 204, 204);
margin: 5px 0pt;
padding: 5px;
background-color: blue;
height:50px;
}
button {
float:right;
}
</style>
</head>
<body>
<div id="hold">
<button id="edit">Edit</button><button id="delete">Delete</button>
</div>
<form>
<div><textarea class="textI" id="textI2" style="width: 400px; height: 50px;"></textarea></div>
<div><input type="button" id="add"value="add" onclick="theDiv_append()" /></div>
</form>
<script language="javascript">
$('.textI').each(function() {
var default_value = this.value;
$(this).focus(function() {
if(this.value == default_value) {
this.value = '';
}
});
});
function theDiv_append() {
$('#theDiv').append($('#textI2').val());
}
</script>
</body>
</html>
try this , change #add click to this , it works in jsfiddle, just add the text, I didn't do that , but you will see how to add new blue div
$("#add").click(function(){
var newRow = $('#theDiv').clone();
$('#hold').append(newRow);
$('#edit').wrap('<div class="theDiv" />');
});
});
I dynamically create an element (div) in javascript, on which i register an event listener:
var tooltip = document.createElement('div');
tooltip.onclick = function() { alert('hello'); }
Now, if I attach this element to the document body:
document.body.appendChild(tooltip);
all is well and the event is captured. However (for positioning purposes) i want to attach this element to a (static) sub-element within my page, e.g:
document.getElementById('id').appendChild(tooltip);
and the element is generated and positioned correctly - but the onclick event now is no longer captured. Any thoughts? This is x-browser, so i must be missing something.
Thanks, Don.
You're creating not only one but MANY divs.
Try this instead(I hope you don't mind but I fixed the HTML and CSS too):
<html>
<head>
<script type="text/javascript">
function makeDiv() {
if(!document.getElementById('tooltipDiv')){
var tooltip = document.createElement('div');
tooltip.id = "tooltipDiv";
// Give our tooltip a size and colour so we can see it
tooltip.style.height = '200px';
tooltip.style.position = 'absolute';
tooltip.style.width = '200px';
tooltip.style.backgroundColor = '#eee';
// Register onclick listener
tooltip.onclick = function() { alert('hello'); }
//tooltip.addEventListener("click", function(){ alert('hello'); }, false);
// *** Comment one of these out: ***
//document.body.appendChild(tooltip);
document.getElementById('myDiv').appendChild(tooltip);
}
}
</script>
</head>
<body>
<div id="myDiv"
onmouseover="makeDiv();"
style="position: relative; top: 100px; left: 100px; border: 1px solid red; width: 200px;">
<span>my div text</span>
</div>
</body>
</html>
Maybe you need to register the event handler after appending?
Your code works fine for me on firefox 3.0.5 and IE7. Are you sure your example is correct?
Ok all, here is my code, apologies for the delay. A version with a work-around is posted underneath:
<html>
<head>
<script type="text/javascript">
function makeDiv() {
var tooltip = document.createElement('div');
// Give our tooltip a size and colour so we can see it
tooltip.style.height = '200px';
tooltip.style.position = 'absolute';
tooltip.style.width = '200px';
tooltip.style.backgroundColor = '#eee';
// Register onclick listener
tooltip.onclick = function() { alert('hello'); }
// *** Comment one of these out: ***
//document.body.appendChild(tooltip);
document.getElementById('myDiv').appendChild(tooltip);
}
</script>
</head>
<body>
<div id="myDiv"
onmouseover="makeDiv();"
style="position: relative; top: 100px; left; 100px; border: 1px solid red; width: 200px;">
<span>my div text</span>
</div>
</body>
</html>
===================================
OK - so this works:
<html>
<head>
<script type="text/javascript">
function makeDiv() {
var tooltip = document.createElement('div');
// Give our tooltip a size and colour so we can see it
tooltip.style.height = '200px';
tooltip.style.position = 'absolute';
tooltip.style.width = '200px';
tooltip.style.backgroundColor = '#eee';
// Register onclick listener
tooltip.onclick = function() { alert('hello'); }
// *** Comment one of these out: ***
//document.body.appendChild(tooltip);
document.getElementById('container').appendChild(tooltip);
}
</script>
</head>
<body>
<div id="container" style="border: 1px solid blue; float: left; ">
<div id="myDiv"
onmouseover="makeDiv();"
style="position: relative; border: 1px solid red; width: 200px;">
<span>my div text</span>
</div>
</div>
</body>
</html>
Here is some code to remove the tooltip for onmouseout.
Give your toolTip an ID when creating it:
toolTip.setAttribute('id','toolTip');
Then for onmouseout
function removeDiv(container) {
var toolTip = document.getElementById('toolTip');
document.getElementById(container).removeChild(toolTip);
}