My code:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=, initial-scale=1.0">
<link rel="stylesheet" href="./index.css">
<title>Youpotify</title>
</head>
<body>
<div class="download">
<div class="video">
<button id="video">Download this video</button>
</div>
<div class="playlist">
<button id="playlist">Download this playlist</button>
</div>
<div class="channel">
<button id="channel">Download this channel</button>
</div>
</div>
<script>
document.getElementById("video").addEventListener("click", () => {
document.getElementById("video").style.backgroundcolor = "red";
});
</script>
</body>
</html>
I loaded this addon on Temporary Extension and I click the button but the background color did not change.
I wanted to run my JavaScript file in firefox addon popup HTML file, but it didn't work.
There are a couple of potential issues here:
First, inline Javascript (inside <script></script> tags) is not permitted by default.
To include Javascript to your popup, you need to put it into a separate Javascript file and reference is with:
<script src="index.js"></script>
where your index.js is in the same folder and has your code:
document.getElementById("video").addEventListener("click", () => {
document.getElementById("video").style.backgroundColor = "red";
});
Second,
document.getElementById("video").style.backgroundcolor = "red";
has incorrect attribute, it should be style.backgroundColor with a capital C.
Related
Trying to generate a single receipt with break/cut the paper in between and to generate 2 copies, one for customer and another for merchant i.e (to have 2 different slips).
Took reference from https://parzibyte.me/blog/en/2019/10/10/print-receipt-thermal-printer-javascript-css-html/
Tried to apply page break as below but while printing via web application seeing no breaks/cut in the printed receipt.
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<link rel="stylesheet" href="style.css">
<title>Receipt example</title>
</head>
<body>
<header>
<h1>HEADER</h1>
</header>
<div style="page-break-after:always"></div>
<section id="content">
<h1>CONTENT</h1>
</section>
<div style="page-break-after:always"></div>
<footer>
<h1>FOTTER</h1>
</footer>
<button id="btnPrint" class="hidden-print">Print</button>
<script>
const $btnPrint = document.querySelector("#btnPrint");
$btnPrint.addEventListener("click", () => {
window.print();
});
</script>
</body>
</html>
I want to create a simple JS function where I click on a button, and the background changes into the color of that button. I have used an external JS file but even though I have used the function, it shows this error :'changecolor' is defined but never used.
here's the code:
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<link rel="stylesheet" href="styles.css">
<title>JavaScript Background Color Switcher</title>
</head>
<body>
<div class="canvas">
<h1>Color Scheme Switcher</h1>
<span onclick="changecolor('grey')" class="button" id="grey"></span>
<span onclick="changecolor('white')" class="button" id="white"></span>
<span onclick="changecolor('blue')" class="button" id="blue"></span>
<span onclick="changecolor('yellow')" class="button" id="yellow"></span>
</div>
<script src="app.js"></script>
</body>
</html>
JS file:
function changecolor (id) {
document.body.style.background = document.getElementById(id).innerHTML
}
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<link rel="stylesheet" href="styles.css">
<title>JavaScript Background Color Switcher</title>
</head>
<body>
<div class="canvas">
<h1>Color Scheme Switcher</h1>
<span onclick="changecolor('grey')" class="button" id="grey"></span>
<span onclick="changecolor('white')" class="button" id="white"></span>
<span onclick="changecolor('blue')" class="button" id="blue"></span>
<span onclick="changecolor('yellow')" class="button" id="yellow"></span>
</div>
<script src="app.js"></script>
</body>
</html>
JS file:
function changecolor (id) {
document.body.style.background = id;
}
now tell me if it works or not :)
Move script tag into the head section. Or at least put function declaration before its usage (move script tag to the very top of body).
Be sure to use a script tag at the end of the body where you are including the JS file. And to consume the functions of the JS file you should use them bellow the include of the file. This is the recommended approach.
Your tag's greater than mark is in the wrong place.
Move it right after and
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<link rel="stylesheet" href="styles.css">
<title>JavaScript Background Color Switcher</title>
</head>
<body>
<div class="canvas">
<h1>Color Scheme Switcher</h1>
<div id="switch"><!--dont delete this div its here to avoid js to select all elements with class button -->
<span class="button" id="grey"></span>
<span class="button" id="white"></span>
<span class="button" id="blue"></span>
<span class="button" id="yellow"></span>
</div>
</div>
<script src="app.js"></script>
</body>
</html>
JS file:
function changecolor(id) {
document.body.style.background = id;
}
var rootElem = document.querySelector("#switch");
var buttonArr = rootElem.querySelectorAll(".button");
for (let i = 0; i < buttonArr.length; i++){
buttonArr[i].addEventListener('click', function(){
changecolor(buttonArr[i].id);
}
}
Just drop the name or hex of the color in the id of the button and add as many as you want
Warning Dont remove div with id switch and dont alter the class of the
buttons used for the switching color
I'm on a tutorial to create a success check mark with an animation.
I already created all the elements such as the box for the alert etc but have trouble with an animation.
Here is the code example I'm following : Link
I tried to do it on my computer putting the HTML part and the JS together and the css in a style.css sheet but doesn't work :(
Here is the HTML document :
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<link rel="stylesheet" href="style.css" />
<title>Test</title>
<script>
$("button").click(function () {
$(".check-icon").hide();
setTimeout(function () {
$(".check-icon").show();
}, 10);
});
</script>
</head>
<body>
<div class="success-checkmark">
<div class="check-icon">
<span class="icon-line line-tip"></span>
<span class="icon-line line-long"></span>
<div class="icon-circle"></div>
<div class="icon-fix"></div>
</div>
</div>
<center>
<button id="restart">Restart Animation</button>
</center>
</body>
</html>
I didn't copy the css as it is the same as is the link and a long code..
It gives me a white screen and a lot of warnings on code inspection :
As I'm doing something wrong please ?
Thank you for your help,
Jerry
jQuery is missing from your code, try adding adding it in the <head> section.
EDIT: You are also using a wrong .css file. I think you copied the uncompiled SCSS from the tutorial. To fix this, go back to the CodePen example and on the top-right corner of the CSS section open the context menu and click "View Compiled CSS". Then copy the CSS into style.css
Here is a working solution:
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>Test</title>
<link rel="stylesheet" href="style.css" />
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.0.0/jquery.min.js"></script>
<script>
$(() => {$("button").click(function () {
$(".check-icon").hide();
setTimeout(function () {
$(".check-icon").show();
}, 10);
});});
</script>
</head>
<body>
<div class="success-checkmark">
<div class="check-icon">
<span class="icon-line line-tip"></span>
<span class="icon-line line-long"></span>
<div class="icon-circle"></div>
<div class="icon-fix"></div>
</div>
</div>
<center>
<button id="restart">Restart Animation</button>
</center>
</body>
</html>
I am beginner of javascript.
but it doesn't work. plz help me.
I am using Microsoft VSCode.
This is my main.html.
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0"/>
<meta http-equiv="X-UA-Compatible" content="ie=edge"/>
<link rel="javascript" src="script.js"/>
<link rel="stylesheet" href="https://unpkg.com/papercss#1.4.1/dist/paper.min.css"/>
<link rel="stylesheet" href="style.css"/>
<title>Ultimate R-S-P</title>
</head>
<body>
<div class="login_box">
<h1><span class="badge" id="loginbtn">main</span>
</div>
</body>
</html>
This is script.js
console.log("start!");
var loginBtn = document.getElementById("loginbtn");
loginBtn.onclick = function(){
console.log("onclick event start");
};
You need change the:
<link rel="javascript" src="script.js"/>
into:
<script src="script.js"></script>
first choice:put script at the bottom of the body
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<meta http-equiv="X-UA-Compatible" content="ie=edge" />
<script src="script.js"></script>
<link rel="stylesheet" href="https://unpkg.com/papercss#1.4.1/dist/paper.min.css" />
<link rel="stylesheet" href="style.css" />
<title>Ultimate R-S-P</title>
</head>
<body>
<div class="login_box">
<h1><span class="badge" id="loginbtn">main</span></h1>
</div>
<script>
console.log("start!");
var loginBtn = document.getElementById("loginbtn");
loginBtn.onclick = function() {
console.log("onclick event start");
};
</script>
</body>
</html>
second choice:move your script content to the window.onload=function(){}
window.onload = function() {
console.log("start!");
var loginBtn = document.getElementById("loginbtn");
loginBtn.onclick = function() {
console.log("onclick event start");
};
};
if you choose this,you have to change your script tag
<link rel="javascript" src="script.js"/>
to
<script src="script.js"></script>
The < link > tag defines a link between a document and an external resource.
The < link > tag is used to link to external style sheets.
The < script > tag is used to define a client-side script (JavaScript).
So, you need to change this code:
<link rel="javascript" src="script.js"/>
into this:
<script type="text/javascript" src="script.js"></script>
Use this tag not the link tag
<script src="script.js"></script>
Also fix your html you are missing an h1 end tag
<h1><span class="badge" id="loginbtn">main</span></h1>
Add Script tag as below.
You have used link tag instead of script.
<script type="text/javascript" src="script.js">
actually i was confused.
that was location of javascript.
solution
<body>
<div class="login_box">
<h1><span class="badge" id="loginbtn">main</span>
</div>
**<script type="text/javascript" src="script.js"></script>**
</body>
i put the javascript code in the body.
I want to change the meta tag content i.e. refresh rate and url dynamically using javascript. Using a button to enable javascript function. Tried 3 alternatives but not working. Please help.
Thanks,Amresh
<!DOCTYPE html>
<html>
<head>
<meta HTTP-EQUIV="refresh" name="description" id="mymetatag"
content="5;URL=http://localhost:6985/ChartJSDemo/Is_Mainpage.html">
<meta charset="ISO-8859-1">
<title>Processing Details</title>
<link rel="stylesheet" type="text/css" href="css/MF_job_failTable.css">
</head>
<body>
<button onclick="myFunction()">Click me</button>
<script>
function myFunction() {
<!--document.querySelector('meta[name="description"]').setAttribute("content","5;URL=http://google.co.in");-->
<!--document.getElementById("mymetatag").setAttribute("content", "5;URL=http://google.co.in");-->
var m = document.createElement('meta');
m.name = 'description';
m.id = 'mymetatag';
m.content = '5;URL=http://google.co.in';
m.HTTP-EQUIV= 'refresh';
document.head.appendChild(m);
}
</script>
This works for me.
The issue could have been that you tried a first code which did not work and you commented the code with HTML comments <!-- [...] -->instead of Javascript comments: // [...] or /** [...] */.
<!DOCTYPE html>
<html>
<head>
<meta HTTP-EQUIV="refresh" name="description" id="mymetatag" content="5;URL=http://localhost:6985/ChartJSDemo/Is_Mainpage.html">
<meta charset="ISO-8859-1">
<title>Processing Details</title>
<link rel="stylesheet" type="text/css" href="css/MF_job_failTable.css">
</head>
<body>
<button onclick="myFunction()">Click me</button>
<script>
function myFunction() {
document.getElementById("mymetatag").setAttribute("content", "5;URL=http://google.co.in");
}
</script>
</body>
</html>
I looks like you misuse the functionality of metatags, JS doesn't save the state between requests. And, BTW, you can do reload/redirect using the javascript itself.