This question already has answers here:
JSFiddle code not working in my own page
(3 answers)
Closed 5 years ago.
Sorry, not quite the same as previously asked versions of this. I've tried those solutions to no avail.
I have worked with some folks to iron out some issues with a snippet we were working on. Finally got it working on JSfiddle how we need it, but for whatever reason, it's not working on a plain HTML site. The content looks to load, but the preview doesnt work after choosing an image.
Here is the JSfiddle working here: http://jsfiddle.net/ELcf6/568/
Here is all of the code pieces compiled into a single page for testing. This is the example that seems to not work. Does JSfiddle inject any pre-requisites that I might be missing?
Any help in figuring this out would be greatly appreciated.
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<script>
var imageLoader = document.getElementById('filePhoto');
imageLoader.addEventListener('change', handleImage, false);
function handleImage(e) {
var filetype = imageLoader.files[0].type;
var reader = new FileReader();
reader.onload = function (event) {
if(filetype.indexOf("image") > -1){
$('.uploader img').attr('src',event.target.result);
}else if(filetype.indexOf("video") > -1){
$('.uploader video')[0].src =reader.result;
}
}
reader.readAsDataURL(e.target.files[0]);
}
</script>
<style type="text/css">
.uploader {
position:relative;
overflow:hidden;
width:300px;
height:350px;
background:#f3f3f3;
border:2px dashed #e8e8e8;
}
#filePhoto{
position:absolute;
width:300px;
height:400px;
top:-50px;
left:0;
z-index:2;
opacity:0;
cursor:pointer;
}
.uploader img,.uploader video{
position:absolute;
width:302px;
height:352px;
top:-1px;
left:-1px;
z-index:1;
border:none;
object-fit:cover;
}
</style>
<title></title>
</head>
<body>
<div class="uploader" onclick="$('#filePhoto').click()">
click here or drag here your images for preview and set userprofile_picture data
<img src=""/>
<video></video>
<input type="file" name="userprofile_picture" id="filePhoto" />
</div>
</body>
</html>
Your script is running before the DOM has loaded and that's why you are getting the "Cannot read property 'addEventListener' of null" error.
Move the script so that it is just before the close of the body tag.
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<style type="text/css">
.uploader {
position:relative;
overflow:hidden;
width:300px;
height:350px;
background:#f3f3f3;
border:2px dashed #e8e8e8;
}
#filePhoto{
position:absolute;
width:300px;
height:400px;
top:-50px;
left:0;
z-index:2;
opacity:0;
cursor:pointer;
}
.uploader img,.uploader video{
position:absolute;
width:302px;
height:352px;
top:-1px;
left:-1px;
z-index:1;
border:none;
object-fit:cover;
}
</style>
<title></title>
</head>
<body>
<div class="uploader" onclick="$('#filePhoto').click()">
click here or drag here your images for preview and set userprofile_picture data
<img src=""/>
<video></video>
<input type="file" name="userprofile_picture" id="filePhoto" />
</div>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<script>
var imageLoader = document.getElementById('filePhoto');
imageLoader.addEventListener('change', handleImage, false);
function handleImage(e) {
var filetype = imageLoader.files[0].type;
var reader = new FileReader();
reader.onload = function (event) {
if(filetype.indexOf("image") > -1){
$('.uploader img').attr('src',event.target.result);
}else if(filetype.indexOf("video") > -1){
$('.uploader video')[0].src =reader.result;
}
}
reader.readAsDataURL(e.target.files[0]);
}
</script>
</body>
</html>
Related
It looks like the visible display of a iphone 6 is 559px in safari. The address bar and bottom tool bar taking up some real estate. How do you get the visible height (559px) using javascript or jquery?
run the snippet and inspect with developer for iphone 6,7,and 8
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width, height=device-height">
<title>space</title>
<style>
body{
margin:0;
height:100%;
position:fixed;
top:0px;
}
div{
height:110px;
width:100%;
position:fixed;
background-color:blue;
}
#a1{
top:0px;
background-color:lightgreen
}
#a2{
top:110px;
}
#a3{
top:220px;
background-color:green;
}
#a0{
top:330px;
height:7px;
}
#a4{
top:337px;
background-color:green;
}
#a5{
top:447px;
}
#a6{
top:557px;
background-color:green;
}
</style>
</head>
<body>
<div id='a1' onclick="myFunction()">110</div>
<div id='a2'>220</div>
<div id='a3'>330</div>
<div id='a0'>337</div>
<div id='a4'>447</div>
<div id='a5'>557</div>
<div id='a6'>667</div>
<script>
function myFunction(){
var h = window.innerHeight;
console.log(h);
}
</script>
</body>
</html>
window.innerHeight should give the visible height of the screen.
Tried the best I could and did some research, I still couldn't figure it out.
My goal is to create an easy coded lightbox for a part of my final examination website that im working on.
Please need help with this annoying problem of mine, would be very appreciated!
$(document).ready(function () {
$('button').click(function() {
$('body').append(' <div id="lb-shadow"><p id="lb-x">[ x ]</p></div> ');
$('body').append(' <div id="lb-container"></div> ');
$('#lb-shadow').fadeIn(6000 );
$('#lb-container').fadeIn(6000);
$('#lb-shadow').click(function(){
$('#lb-container').fadeOut(6000);
$('#lb-shadow').fadeOut(6000);
$('#lb-container').detach();
$('#lb-shadow').detach();
});
});
});
#lb-btn{
position:absolute;
outline:0;
border:0;
padding:5px 10px;
cursor:pointer;
background-color:black;
}
#lb-btn p{
padding:5px;
color:#ccc;
border:1px solid white;
}
#lb-shadow{
position:absolute;
left:0;
right:0;
height:100%;
width:100%;
background-color:rgba(0, 0, 0, 0.7);
}
#lb-x{
color:#ccc;
text-transform:uppercase;
float:right;
margin:15px;
cursor:pointer;
transition: ease .3s;
}
#lb-x:hover{
color:white;
}
#lb-container{
position:absolute;
height:400px;
width:600px;
left:calc(50% - 300px);
top:calc(50% - 200px);
background-color:white;
}
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Min hemsida</title>
<link rel="stylesheet" type="text/css" href="css/cindex.css">
<link href="https://fonts.googleapis.com/css?family=Raleway" rel="stylesheet" type="text/css">
<link href='https://fonts.googleapis.com/css?family=Open+Sans' rel='stylesheet' type='text/css'>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.2.0/jquery.min.js"></script>
<script src="js/cindex.js"></script>
</head>
<body>
<button id="lb-btn"><p> Login / Register </p></button>
</body>
</html>
If the problem is the click handler, try attaching the event listener globally like so, this way should work even if the element is created after the listener. (Otherwise the duplicate comment on your question should solve the issue)
$(document).ready(function () {
$(document).on('click', '#lb-shadow', function(){
$('#lb-container').fadeOut(6000);
$('#lb-shadow').fadeOut(6000);
$('#lb-container').detach();
$('#lb-shadow').detach();
});
$('button').click(function() {
$('body').append('<div id="lb-shadow"><p id="lb-x">[ x ]</p></div>');
$('body').append('<div id="lb-container"></div>');
$('#lb-shadow').fadeIn(6000);
$('#lb-container').fadeIn(6000);
});
});
I solved it!
I just added display:block on the lb-container and lb-shadow. Apperently the fade effects trigger it automatically and I did cut down my js code aswell.
$(document).ready(function () {
$('button').click(function() {
$('body').append(' <div id="lb-shadow"><p id="lb-x">[ x ]</p></div> ');
$('body').append(' <div id="lb-container"></div> ');
$('#lb-shadow').fadeIn();
$('#lb-container').fadeIn();
$('#lb-shadow').click(function(){
$('#lb-container').fadeOut();
$('#lb-shadow').fadeOut();
});
});
});
I found this piece of code on this site and want to use it in my project. However I'm not sure how to change this so it doesn't push the contents off the page when opening the menu. Any help would be greatly appreciated.
<!DOCTYPE html>
<html>
<head>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<script>
$(document).ready(function(){
$("#flip").click(function(){
if( $(this).text()=="Open")
{
$(this).text("Hide");
}
else
{
$(this).text("Open");
}
$("#panel").slideToggle("fast");
});
});
</script>
<style>
#panel,#flip
{
padding:5px;
text-align:center;
background-color:#e5eecc;
border:solid 1px #c3c3c3;
}
#panel
{
padding:50px;
display:none;
width:90px;
height: 200px
}
</style>
</head>
<body>
<button id="flip">Open</button>
<div id="panel">Menu!</div>
</div>
<p>
Something else on the page
</body>
</html>
I have red rectangle as a canvas.
And i have green rectangle as a html element.
I try to unite them together as a one canvas element as you can see in the demo jsfiddle
My code:
<!DOCTYPE html>
<html>
<head>
<style type='text/css'>
#myCanvas{
width:300px; height:150px;
border:1px solid #d3d3d3;
position:absolute; top:0;left:0;
}
div{
width:75px; height:75px;
border:1px solid blue;
position:absolute; top:0;left:50px;
background-color:green;
}
button{
position:absolute; top:0;left:150px;
}
</style>
</head>
<body>
<canvas id="myCanvas" >
Your browser does not support the HTML5 canvas tag.</canvas>
<div></div>
<script>
var c=document.getElementById("myCanvas");
var ctx=c.getContext("2d");
ctx.fillStyle="red";
ctx.fillRect(10,10,50,50);
function copy()
{
var imgData=ctx.getImageData(10,10,50,50);
ctx.putImageData(imgData,10,70);
}
</script>
<button onclick="copy()">Copy</button>
</body>
</html>
many thanks.
There is no direct way to get html element as image and then you can easily put it into canvas. But maybe you can make it by taking screenshot of html.
You might want to look at this article;
Take screenshot of web page
My canvas element isnt working right. It wont draw a rectangle. Please help me diagnose the problem. I don't know where the problem is, is it my css, javascript, or html? Did I set up everything right because I got no errors when i ran my debugger and put it on a server?
index.html
<!DOCTYPE html>
<html>
<head>
<title>Paco Developement</title>
<link rel="stylesheet" href="style.css" />
<script src="game.js"></script>
</head>
<body>
<canvas id="canvasBg" height="500" width="800"></canvas>
<canvas id="character" height="500" width="800"></canvas>
</body>
</html>
style.css
* {
padding:0px;
margin:0px;
}
header, section, footer, aside, nav, article, figure, hgroup{
display:block;
}
body {
background:#BADA55;
width:100%;
height:100%;
}
#canvasBg {
display:block;
background:#fff;
margin:100px auto 0px;
}
#character {
display:block;
margin:-500px auto 0px;
}
game.js
var canvasBg = document.getElementById('canvasBg');
var bgCtx = canvasBg.getContext("2d");
document.addEventListener('load',drawRect,false);
function drawRect(){
bgCtx.fillStyle="#FF0000";
bgCtx.fillRect(0,0,150,75);
}
Live Demo
Change document to window for your event listener and it should work for you.
window.addEventListener('load',drawRect,false);