Change a button element in a paragraph - javascript

/*jshint strict:false */
document.getElementById("btn_1").addEventListener("click", function() {
test(this);
});
document.getElementById("btn_2").addEventListener("click", function() {
test(this);
});
document.getElementById("btn_3").addEventListener("click", function() {
test(this);
});
function test(id) {
var e = document.getElementById(id);
var d = document.createElement('p');
d.innerHTML = e.innerHTML;
e.parentNode.insertBefore(d, e);
e.parentNode.removeChild(e);
}
/* CSS Document */
body {
background-color: #484848;
}
p {
margin: 2em 2em;
color: aliceblue;
}
button {
margin: 1em 2em;
color: ghostwhite;
background: #677762;
}
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<link rel="stylesheet" href="style.css">
<title>Line Game</title>
</head>
<p>Als die ersten Menschen auftauchten lehrten wir sie:</p>
<button id="btn_1">Jagen</button>
<button id="btn_2">Fischen</button>
<button id="btn_3">Landwirtschaft</button>
<!--Javascript Time-->
<script src="Javascript.js"></script>
<body>
</body>
</html>
So here is all my code. And i want to replace the Buttons to Paragraph after someone clicked them. The old Text from the Buttons should still be there.
Yea sorry for the Dump Question, tried a few hours and get a little tired of trial and error.


Change test(this); to test(this.id);
/*jshint strict:false */
document.getElementById("btn_1").addEventListener("click", function() {
test(this.id);
});
document.getElementById("btn_2").addEventListener("click", function() {
test(this.id);
});
document.getElementById("btn_3").addEventListener("click", function() {
test(this.id);
});
function test(id) {
var e = document.getElementById(id);
var d = document.createElement('p');
d.innerHTML = e.innerHTML;
e.parentNode.insertBefore(d, e);
e.parentNode.removeChild(e);
}
/* CSS Document */
body {
background-color: #484848;
}
p {
margin: 2em 2em;
color: aliceblue;
}
button {
margin: 1em 2em;
color: ghostwhite;
background: #677762;
}
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<link rel="stylesheet" href="style.css">
<title>Line Game</title>
</head>
<p>Als die ersten Menschen auftauchten lehrten wir sie:</p>
<button id="btn_1">Jagen</button>
<button id="btn_2">Fischen</button>
<button id="btn_3">Landwirtschaft</button>
<!--Javascript Time-->
<script src="Javascript.js"></script>
<body>
</body>
</html>


In this code you throw link to element
test(this);
but you need to throw attribute id
test(this.id);

Related

Why doesn't jQuery function toggleClass() work?

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<script src="../jquery/jquery.js"></script>
<style type="text/css" rel="stylesheet">
#btn {
background: green;
color: #fff;
padding: 15px;
font-size: 24px;
font-weight: bold;
}
</style>
</head>
<body>
<script>
$(() => {
$("#btn").click(() => {
if ($("#btn").hasClass("green")) {
$("#btn").css("backgroundColor", "red");
}
else if ($("#btn").hasClass("red")) {
$("#btn").css("backgroundColor", "green");
}
});
});
</script>
<button id="btn">Button</button>
</body>
</html>
I want the button to change its color either to red if it's green or to green if it's red. So I use toggleClass() to implement that.
Question: why doesn't it work?

It is almost certainly working but there are no CSS rules for the class "background" in the code you posted. The function is for adding/removing an entry from the class list of an element, not for directly manipulating style object properties.
If you do switch from .toggleClass() to .css(), you'll find that switching a property from one value to another immediately will have no visible effect. The browser will effectively ignore the first update.

Your are change class name using toggle not the rule within the class. But you can iverride it by adding inline style, like:
$("#btn").css("background", "red");
$(() => {
$("#btn").click(function () {
const bgColor = this.style.backgroundColor;
$(this).css("backgroundColor", bgColor === 'green' ? "red" : "green");
});
});
#btn {
color: #fff;
padding: 15px;
font-size: 24px;
font-weight: bold;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<button id="btn" style="background-color:green;">Button</button>

It is perfectly correct to use the .toggleClass() method...
But the argument is a string of space separated classnames.
And, of course, you have to define those class rules in your style sheet.
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<!--script src="../jquery/jquery.js"></script-->
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<style type="text/css" rel="stylesheet">
#btn {
/*background: green;*/
color: #fff;
padding: 15px;
font-size: 24px;
font-weight: bold;
}
.red{
background-color: red;
}
.green{
background-color: green;
}
</style>
</head>
<body>
<script>
$(() => {
$("#btn").click(() => {
$("#btn").toggleClass("red green");
});
});
</script>
<button id="btn" class="green">Button</button>
</body>
</html>

Javascript image changer (2 images in one picture file) with one button

https://i.stack.imgur.com/LhvYb.png - This is the image that i want to work with
I made this so far,i made the position to change when i click on the button but i want to when i click the button again the first position to come back.
<!DOCTYPE html>
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Title</title>
<link rel="stylesheet" href="index.css">
</head>
<body>
<div></div>
<button>Press me</button>
<script src="index.js"></script>
</body>
</html>
This is the css
div {
width: 125px;
height: 122px;
background-image: url(picture2.png);
background-repeat: no-repeat;
}
And this is the js
var image = document.getElementsByTagName('div')[0];
var button = document.getElementsByTagName('button')[0];
button.addEventListener('click',switchPic,false);
function switchPic (e){
image.style.backgroundPosition="-150px 0";
}

simply use classList.toggle
const myDiv = document.getElementById('my-div')
, myButton = document.getElementById('my-button')
;
myButton.onclick=()=>
{
myDiv.classList.toggle('right150')
}
div#my-div {
width: 125px;
height: 122px;
background-image: url(https://i.stack.imgur.com/LhvYb.png);
background-repeat: no-repeat;
}
div#my-div.right150 {
background-position-x: -150px;
}
<div id="my-div"></div>
<button id="my-button">Press me</button>
or, with an addEventListener...
const myDiv = document.getElementById('my-div')
, myButton = document.getElementById('my-button')
;
myButton.addEventListener('click',switchPic)
function switchPic (e)
{
myDiv.classList.toggle('right150')
}

One of Multiple Scripts in HTML Sheet Not Working

I am trying to have multiple scripts run in my html sheet, and it seems to not be working. All the other scripts work except for the script for the blinking function. I don't see what the problem is. Can you find the issue with my code? Thanks in advance!
Here is my code below:
<!DOCTYPE html>
<html>
<head>
<style>
body {
background-color: coral;
color: white;
}
.text2{
color: white;
width: 100px;
float: right;
padding-top: 10px;
}
</style>
<link rel="stylesheet" type="text/css" href="styles.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script>
$(document).ready(function(){
$(".btn1").on('click',function(){
$("p").hide();
$(".text2").hide()
$('body').css("background", "black");
});
});
</script>
<script>
//blink
var element = $(".text2");
var shown = true;
setInterval(toggle, 500);
function toggle() {
if(shown) {
element.hide();
shown = false;
} else {
element.show();
shown = true;
}
}
</script>
</head>
<body>
<p>This is a paragraph.</p>
</div>
<div class="text2">
-- : --
</div>
<button class="btn1">online</button>
</body>
</html>

The second script must be inside a JQuery function.
$(document).ready(function(){
var element = $(".text2");
var shown = true;
setInterval(toggle, 500);
function toggle() {
if(shown) {
element.hide();
shown = false;
} else {
element.show();
shown = true;
}
}
});

The second script's contents should be in the document ready handler otherwise the code attempts to locate and work with the .text2 element before that element has been parsed into memory.
<!DOCTYPE html>
<html>
<head>
<style>
body {
background-color: coral;
color: white;
}
.text2{
color: white;
width: 100px;
float: right;
padding-top: 10px;
}
</style>
<link rel="stylesheet" href="styles.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script>
$(document).ready(function(){
$(".btn1").on('click',function(){
$("p").hide();
$(".text2").hide()
$('body').css("background", "black");
});
var element = $(".text2");
var shown = true;
setInterval(toggle, 500);
function toggle() {
if(shown) {
element.hide();
} else {
element.show();
}
shown = !shown;
}
});
</script>
</head>
<body>
<p>This is a paragraph.</p>
<div class="text2">-- : --</div>
<button class="btn1">online</button>
</body>
</html>

How to handle onclick event of a button?

In the below code,
<!DOCTYPE html>
<html>
<head>
<title>Button events</title>
<meta charset="UTF-8">
<style type="text/css">
button{
background-color: #00FFFF;
border: 2px solid orange;
border-radius: 10px;
width: 60px;
height: 30px;
color:white;
}
</style>
</head>
<body>
<script type="text/javascript">
document.body.lastElementChild.onclick = changeColor;
function changeColor(){
if(document.body.lastElementChild.innerHTML == "Like"){
document.body.lastElementChild.style.background-color = "#FF9966";
document.body.lastElementChild.innerHTML = "Unlike";
}else{
document.body.lastElementChild.style.background-color="#00FFFF";
document.body.lastElementChild.innerHTML = "Like";
}
}
</script>
<button type="button" name="LikeUnlike">Like</button>
</body>
</html>
error is thrown at line document.body.lastElementChild.style.background-color = "#FF9966";. Error is Invalid left-hand side in assignment.
How do I resolve this error?
Note: yet to learn JQuery

First of all you need to use element.style.backgroundColor instead of element.style.background-color.
Here is a list of the JS equivalent of CSS attributes.
Your second problem is that your script executed before the <button> is loaded, thus making the script the current lastElementChildof body.
You can solve this by wrapping your script in window.onload:
(Also, selecting your button with document.body.lastElementChild is bound to give you errors since you most likely at some point will add something after the button)
<!DOCTYPE html>
<html>
<head>
<title>Button events</title>
<meta charset="UTF-8">
<style type="text/css">
button {
background-color: #00FFFF;
border: 2px solid orange;
border-radius: 10px;
width: 60px;
height: 30px;
color: white;
}
</style>
</head>
<body>
<script type="text/javascript">
window.onload = function() {
var likeButton = document.getElementById("like-button");
likeButton.onclick = changeColor;
function changeColor() {
if (likeButton.innerHTML == "Like") {
likeButton.style.backgroundColor = "#FF9966";
likeButton.innerHTML = "Unlike";
} else {
likeButton.style.backgroundColor = "#00FFFF";
likeButton.innerHTML = "Like";
}
}
}
</script>
<button type="button" name="LikeUnlike" id="like-button">Like</button>
</body>
</html>

background-color is not a valid JavaScript identifier. For setting it with DOM style object, it should be backgroundColor in camel case.
More info on DOM style object at http://www.w3schools.com/jsref/dom_obj_style.asp

Check out my demo
JS
document.body.lastElementChild.onclick = changeColor;
function changeColor(){
if(document.body.lastElementChild.innerHTML == "Like"){
document.body.lastElementChild.style.backgroundColor = "#FF9966";
document.body.lastElementChild.innerHTML = "Unlike";
}else{
document.body.lastElementChild.style.backgroundColor ="#00FFFF";
document.body.lastElementChild.innerHTML = "Like";
}
}

I think you should use document.body.lastElementChild.style["background-color"] to set color for element

not background-color but backgroundColor . Try this and see if works
document.body.lastElementChild.style.backgroundColor = "#FF9966";
the total code:
document.body.lastElementChild.onclick = changeColor;
function changeColor(){
if(document.body.lastElementChild.innerHTML == "Like"){
document.body.lastElementChild.style.backgroundColor = "#FF9966";
document.body.lastElementChild.innerHTML = "Unlike";
}else{
document.body.lastElementChild.style.backgroundColor ="#00FFFF";
document.body.lastElementChild.innerHTML = "Like";
}
}

You use this code. It is working fine.
<!DOCTYPE html>
<html>
<head>
<title>Button events</title>
<meta charset="UTF-8">
<style type="text/css">
button{
background-color: #00FFFF;
border: 2px solid orange;
border-radius: 10px;
width: 60px;
height: 30px;
color:white;
}
</style>
</head>
<body>
<script type="text/javascript">
document.body.lastElementChild.onclick = changeColor;
function changeColor(){
if(document.body.lastElementChild.innerHTML == "Like"){
document.body.lastElementChild.style.backgroundColor =
"#FF9966";
document.body.lastElementChild.innerHTML = "Unlike";
}else{
document.body.lastElementChild.style.backgroundColor="#00FFFF";
document.body.lastElementChild.innerHTML = "Like";
}
}
</script>
<button type="button" name="LikeUnlike" onclick="changeColor
()">Like</button>
</body>
</html>

You can use Jquery for assign or remove a css class, to add color to your button, with this code:
<script>
$(function() {
$('button').on('click', function() {
$(this).toggleClass('other-color');
});
});
</script>
the toggleClass function is to add and remove a css class,
"othercolor" is your class css with the styles to your button.
Include jquery with this script before </body> and before the code above:
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
like this:
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
<script>
$(function() {
$('button').on('click', function() {
$(this).toggleClass('other-color');
});
});
</script>
I hope it helps you.

moment.js code doesn't appear

Found a really good code from jsfiddle, http://jsfiddle.net/ivangrs/zf80q3nh/ for my project posted here on stackoverflow, but I'm unable to see anything appear upon implementing the code after grabbing it from the site! Help please?
Here's the code I copied
HTML:
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" type="text/css" href="css/style.css" />
<link rel="stylesheet" href="http://code.jquery.com/mobile/1.4.5/jquery.mobile-1.4.5.min.css">
<script src="http://code.jquery.com/jquery-1.11.2.min.js"></script>
<script src="http://code.jquery.com/mobile/1.4.5/jquery.mobile-1.4.5.min.js"></script>
<script src="//cdnjs.cloudflare.com/ajax/libs/moment.js/2.7.0/moment.min.js" type="text/javascript"></script>
<script src="js/javascript.js"></script>
</head>
<body>
<div class='time-frame'>
<div id='time-part'></div>
<div id='date-part'></div>
</div>
<br>
</body>
</html>
javascript.js:
$(document).ready(function() {
var interval = setInterval(function() {
var momentNow = moment();
$('#time-part').html(momentNow.format(' hh:mm:ss a'))
$('#date-part').html(momentNow.format('dddd').substring(0, 8) + ' ' + momentNow.format('DD MMMM YYYY'));
});
$('#stop-interval').on('click', function() {
clearInterval(interval);
});
});
style.css CSS:
.time-frame {
color: #000;
width: 500px;
font-family: Arial;
}
.time-frame > div {
width: 100%;
text-align: center;
background-color: red;
}
#date-part {
font-size: 1.2em;
}
#time-part {
font-size: 2em;
}
#demo {
background-color: red;
font-family: Arial;
}
#demonew {
background-color: green;
font-family: Arial;
}
UPDATE: Ive implemented the changes as suggested by #below the radar but the time does not appear, only the stop time button does.

you forgot a duration for the setInterval function in your javascript.js
$(document).ready(function() {
var interval = setInterval(function() {
var momentNow = moment(); $('#time-part').html(momentNow.format(' hh:mm:ss a'))
$('#date-part').html(momentNow.format('dddd').substring(0,8) + ' '+ momentNow.format('DD MMMM YYYY'));
}, 100);
$('#stop-interval').on('click', function() {
clearInterval(interval);
});
});
you forgot the input for the stop button in your body:
<div class='time-frame'>
<div id='date-part'></div>
<div id='time-part'></div>
</div>
<br>
<input type='button' id='stop-interval' value='Stop time' />

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