I'm trying to capture a div into an image using html2canvas
I have read some similar question here like
How to upload a screenshot using html2canvas?
create screenshot of web page using html2canvas (unable to initialize properly)
I have tried the code
canvasRecord = $('#div').html2canvas();
dataURL = canvasRecord.toDataURL("image/png");
and the canvasRecord will be undefined after .html2canvas() called
and also this
$('#div').html2canvas({
onrendered: function (canvas) {
var img = canvas.toDataURL()
window.open(img);
}
});
browser gives some (48 to be exact) similar errors like:
GET http://html2canvas.appspot.com/?url=https%3A%2F%2Fmts1.googleapis.com%2Fvt%…%26z%3D12%26s%3DGalileo%26style%3Dapi%257Csmartmaps&callback=html2canvas_1 404 (Not Found)
BTW, I'm using v0.34 and I have added the reference file html2canvas.min.js and jquery.plugin.html2canvas.js
How can I convert the div into canvas in order to capture the image.
EDIT on 26/Mar/2013
I found Joel's example works.
But unfortunately when Google map embedded in my app, there will be errors.
<html>
<head>
<style type="text/css">
div#testdiv
{
height:200px;
width:200px;
background:#222;
}
div#map_canvas
{
height: 500px;
width: 800px;
position: absolute !important;
left: 500px;
top: 0;
}
</style>
<script type="text/javascript" src="https://maps.googleapis.com/maps/api/js?v=3&sensor=false"></script>
<script type="text/javascript" src="html2canvas.min.js"></script>
<script type="text/javascript" src="jquery-1.7.2.min.js"></script>
<script language="javascript">
$(window).load(function(){
var mapOptions = {
backgroundColor: '#fff',
center: new google.maps.LatLng(1.355, 103.815),
overviewMapControl: true,
overviewMapControlOptions: { opened: false },
mapTypeControl: true,
mapTypeControlOptions: { position: google.maps.ControlPosition.TOP_LEFT, style: google.maps.MapTypeControlStyle.DROPDOWN_MENU },
panControlOptions: { position: google.maps.ControlPosition.RIGHT_CENTER },
zoomControlOptions: { position: google.maps.ControlPosition.RIGHT_CENTER },
streetViewControlOptions: { position: google.maps.ControlPosition.RIGHT_CENTER },
disableDoubleClickZoom: true,
mapTypeId: google.maps.MapTypeId.ROADMAP,
minZoom: 1,
zoom: 12
};
map = new google.maps.Map(document.getElementById('map_canvas'), mapOptions);
$('#load').click(function(){
html2canvas($('#testdiv'), {
onrendered: function (canvas) {
var img = canvas.toDataURL("image/png")
window.open(img);
}
});
});
});
</script>
</head>
<body>
<div id="testdiv">
</div>
<div id="map_canvas"></div>
<input type="button" value="Save" id="load"/>
</body>
</html>
I ran into the same type of error you described, but mine was due to the dom not being completely ready to go. I tested with both jQuery pulling the div and also getElementById just to make sure there wasn't something strange with the jQuery selector. Below is an example that works in Chrome:
<html>
<head>
<style type="text/css">
div {
height: 50px;
width: 50px;
background-color: #2C7CC3;
}
</style>
<script type="text/javascript" src="html2canvas.js"></script>
<script type="text/javascript" src="jquery-1.9.1.js"></script>
<script language="javascript">
$(document).ready(function() {
//var testdiv = document.getElementById("testdiv");
html2canvas($("#testdiv"), {
onrendered: function(canvas) {
// canvas is the final rendered <canvas> element
var myImage = canvas.toDataURL("image/png");
window.open(myImage);
}
});
});
</script>
</head>
<body>
<div id="testdiv">
</div>
</body>
</html>
If you just want to have screenshot of a div, you can do it like this
html2canvas($('#div'), {
onrendered: function(canvas) {
var img = canvas.toDataURL()
window.open(img);
}
});
you can try this code to capture a div When the div is very wide or offset relative to the screen
var div = $("#div")[0];
var rect = div.getBoundingClientRect();
var canvas = document.createElement("canvas");
canvas.width = rect.width;
canvas.height = rect.height;
var ctx = canvas.getContext("2d");
ctx.translate(-rect.left,-rect.top);
html2canvas(div, {
canvas:canvas,
height:rect.height,
width:rect.width,
onrendered: function(canvas) {
var image = canvas.toDataURL("image/png");
var pHtml = "<img src="+image+" />";
$("#parent").append(pHtml);
}
});
10 2022
This question is quite old, but if anyone looking for a clear solution to implement then here it is. This is using Pure JS with html2canvas and FileSaver
I have tested and it works fine.
Capture everything inside a div.
Step 1
Include the scripts in your footer. jQuery is not needed, These two are fine. If you already have these two in your file, watch out for the correct version. I know it's a little thing, but it is important.
<script src="https://cdnjs.cloudflare.com/ajax/libs/html2canvas/1.4.1/html2canvas.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/FileSaver.js/2.0.0/FileSaver.min.js"></script>
Step 2
Basic div. The style attribute is optional. I am using it here to make it look presentable.
<div id="savethegirl" style="background-color:coral;color:white;padding:10px;width:200px;">
I am a Pretty girl 👩
</div>
<button onclick="myfunc()">Save the girl</button>
It should look like this
Step 3
Include this script
function myfunc(){
// if you are using a different 'id' in the div, make sure you replace it here.
var element = document.getElementById("savethegirl");
html2canvas(element).then(function(canvas) {
canvas.toBlob(function(blob) {
window.saveAs(blob, "Heres the Girl.png");
});
});
};
Step 4
Click the button and it should save the file.
Resources
CDN from: https://cdnjs.com/
This is from Carlos Delgado's article (https://ourcodeworld.com/articles/read/415/how-to-create-a-screenshot-of-your-website-with-javascript-using-html2canvas). I simplified it
If this answer is useful.
Hit that up arrow 🠉 It will help others to find it.
I don't know if the answer will be late, but I have used this form.
JS:
function getPDF() {
html2canvas(document.getElementById("toPDF"),{
onrendered:function(canvas){
var img=canvas.toDataURL("image/png");
var doc = new jsPDF('l', 'cm');
doc.addImage(img,'PNG',2,2);
doc.save('reporte.pdf');
}
});
}
HTML:
<div id="toPDF">
#your content...
</div>
<button id="getPDF" type="button" class="btn btn-info" onclick="getPDF()">
Download PDF
</button>
You can get the screenshot of a division and save it easily just using the below snippet. Here I'm used the entire body, you can choose the specific image/div elements just by putting the id/class names.
html2canvas(document.getElementsByClassName("image-div")[0], {
useCORS: true,
}).then(function (canvas) {
var imageURL = canvas.toDataURL("image/png");
let a = document.createElement("a");
a.href = imageURL;
a.download = imageURL;
a.click();
});
It can be easily done using html2canvas, try out the following,
try adding the div inside a html modal and call the model id using a jquery function. In the function you can specify the size (height, width) of the image to be displayed. Using modal is an easy way to capture a html div into an image in a button onclick.
for example have a look at the code sample,
`
<!-- Modal content-->
<div class="modal-content">
<div class="modal-header">
<div class="modal-body">
<p>Some text in the modal.</p>
`
paste the div, which you want to be displayed, inside the model. Hope it will help.
window.open didn't work for me... just a blank page rendered... but I was able to make the png appear on the page by replacing the src attribute of a pre-existing img element created as the target.
$("#btn_screenshot").click(function(){
element_to_png("container", "testhtmltocanvasimg");
});
function element_to_png(srcElementID, targetIMGid){
console.log("element_to_png called for element id " + srcElementID);
html2canvas($("#"+srcElementID)[0]).then( function (canvas) {
var myImage = canvas.toDataURL("image/png");
$("#"+targetIMGid).attr("src", myImage);
console.log("html2canvas completed. png rendered to " + targetIMGid);
});
}
<div id="testhtmltocanvasdiv" class="mt-3">
<img src="" id="testhtmltocanvasimg">
</div>
I can then right-click on the rendered png and "save as". May be just as easy to use the "snipping tool" to capture the element, but html2canvas is an certainly an interesting bit of code!
You should try this (test, works at least in Firefox):
html2canvas(document.body,{
onrendered:function(canvas){
document.body.appendChild(canvas);
}
});
Im running these lines of code to get the full browser screen (only the visible screen, not the hole site):
var w=window, d=document, e=d.documentElement, g=d.getElementsByTagName('body')[0];
var y=w.innerHeight||e.clientHeight||g.clientHeight;
html2canvas(document.body,{
height:y,
onrendered:function(canvas){
var img = canvas.toDataURL();
}
});
More explanations & options here: http://html2canvas.hertzen.com/#/documentation.html
I've created a Browser Extension for Chrome. I have added an HTML Table to the browser_action.html as a Popup as shown below.
What I want is, when I click on a Table Cell, it should take me to a link. Different links when clicked on different cells.
This is part of my code :
<tr>
<td class="tg-z3w6 hvr-underline-from-center">TEST</td>
<td class="tg-ges6">2715</td>
</tr>
But it doesn't work. Any idea why? or a workaround for this issue?
In your popup.html assuming you are using jquery-
$(document).ready(function(){
$('body').on('click', 'a', function(){
chrome.tabs.create({url: $(this).attr('href')});
return false;
});
});
Here is my solution for my own question.
Create popup.js and link it in the page:
<script src="popup.js" ></script>
Add the following code to popup.js:
document.addEventListener('DOMContentLoaded', function () {
var links = document.getElementsByTagName("a");
for (var i = 0; i < links.length; i++) {
(function () {
var ln = links[i];
var location = ln.href;
ln.onclick = function () {
chrome.tabs.create({active: true, url: location});
};
})();
}
});
That's all, links should work after that.
TEST should be between <a>and </a>.
it's so easy you just need to add target="#" to your a tag
like
<td class="tg-z3w6 hvr-underline-from-center"><a href="http://ew/Environment/Detail?envid=2715" target="#" ></a>TEST</td>
While developing my website I met some trouble concerning the compatibility between browsers like Firefox and Internet Explorer.
Also I have this code, on the head of my document:
<!-- HTML5 Shim -->
<!--[if lt IE 9]><script src="http://html5shim.googlecode.com/svn/trunk/html5.js"></script><![endif]-->
<!-- Modernizr -->
<script src="modernizr.js"></script>
<!-- Webforms2 -->
<!-- jQuery -->
<script src="js/jquery-1.4.3.min.js"></script>
<script src="js/jquery-ui-1.8.5.min.js"></script>
<!-- jQuery Color Picker -->
<link rel="stylesheet" href="colorpicker.css">
<script src="colorpicker.js"></script>
<!-- jQuery Numeric Spinner -->
<script src="spinner.js"></script>
<!-- jQuery Placehol
<script src="jquery.placehold-0.2.min.js"></script> -->
On the body of my page I have:
<!-- Script DATE -->
<script>
var initDatepicker = function() {
$('input[type=date]').each(function() {
var $input = $(this);
$input.datepicker({
minDate: $input.attr('min'),
maxDate: $input.attr('max'),
dateFormat: 'dd/mm/yy'
});
});
};
if(!Modernizr.inputtypes.date){
$(document).ready(initDatepicker);
};
</script>
<!-- Script COLOR -->
<script>
var initColorpicker = function() {
$('input[type=color]').each(function() {
var $input = $(this);
$input.ColorPicker({
onSubmit: function(hsb, hex, rgb, el) {
$(el).val(hex);
$(el).ColorPickerHide();
}
});
});
};
if(!Modernizr.inputtypes.color){
$(document).ready(initColorpicker);
};
</script>
<!-- Script Slider -->
<script>
var initSlider = function() {
$('input[type=range]').each(function() {
var $input = $(this);
var $slider = $('<div id="' + $input.attr('id') + '" class="' + $input.attr('class') + '"></div>');
var step = $input.attr('step');
$input.after($slider).hide();
$slider.slider({
min: $input.attr('min'),
max: $input.attr('max'),
step: $input.attr('step'),
change: function(e, ui) {
$(this).val(ui.value);
}
});
});
};
</script>
The problem I have is concerning the PHP page, because when I'm on index.php all works fine.
When I go on index.php?p=som_page and no matter of what is the argument on p that script does not work anymore.
I'm a bit lost, because on the page I have only include function with no head and no body just the div that are included.
But when I turn back on index.php all works fine again.
This problem hapen only when I'm on Firefox or internet explorer. When I use Chrome all works fine with the input type date, color or range.
Currently, the <input type="color" name="favcolor"> is not supported by IE, Firefox, or Safari. http://www.w3schools.com/html/html5_form_input_types.asp
I am having a webpage with 3 slider and one popup box. For sliders i used jQuery.noConflict() so that is working fine. but in the case of popup box if i am using jQuery.noConflict() its not working.
If i am not using jQuery.noConflict() then my slider wont work.
popup html
<div id="popupContact">
<a id="popupContactClose"><img src="close.gif" alt="close"/></a>
<div id="contactArea"></div>
</div>
<div id="backgroundPopup"></div>
popup jquery
var popupStatus = 0;
function loadPopup(){
if(popupStatus==0){
$("#backgroundPopup").css({
"opacity": "0.2"
});
$("#backgroundPopup").fadeIn("slow");
$("#popupContact").fadeIn("slow");
popupStatus = 1;
}
}
function disablePopup(){
if(popupStatus==1){
$("#backgroundPopup").fadeOut("slow");
$("#popupContact").fadeOut("slow");
popupStatus = 0;
}
}
function centerPopup(){
var windowWidth = document.documentElement.clientWidth;
var windowHeight = document.documentElement.clientHeight;
var popupHeight = $("#popupContact").height();
var popupWidth = $("#popupContact").width();
$("#popupContact").css({
"position": "absolute",
"top": windowHeight/2-popupHeight/2,
"left": windowWidth/2-popupWidth/2
});
$("#backgroundPopup").css({
"height": windowHeight
});
}
var $rp = jQuery.noConflict();
$rp(document).ready(function(){
$rp("#buttonpop").click(function(){
centerPopup();
loadPopup();
});
$rp("#popupContactClose").click(function(){
disablePopup();
});
$rp("#backgroundPopup").click(function(){
disablePopup();
});
$rp(document).keypress(function(e){
if(e.keyCode==27 && popupStatus==1){
disablePopup();
}
});
});
Note: This popup jquery is an external jquery and i am using <script src="http://jqueryjs.googlecode.com/files/jquery-1.2.6.min.js" type="text/javascript"></script> also.
Thank you.
If you use jQuery.noConflict(), that prevents jQuery from aliasing jQuery as $. However your popup code is still trying to use $.
Either reference jQuery, not $, or wrap your code in a closure and reference $ as a local variable within the closure, i.e.
(function($) {
//popup code here
})(jQuery);
I'm probably doing several things wrong as i am new to web programming but here is an attempt at some questions I have and then code below.
Fyi I'm working completely local in dreamweaver and just hitting f11 or whatever to test in a browser. I don't have anything uploaded to a sever except the channel file so if this is the main issue let me know.
For the channel file all I have is a completely empty file (not including html, body, etc.) just the below line.
<script src="//connect.facebook.net/en_US/all.js"></script>
Is that all I need? In order for this button to show up do I have to have all the index.html and .css etc. in the same location as the channel file?
Below is the code I'm using and below that the css for placement. No blue FB button shows up when I run test it in my browser.
<html>
<head>
<title>My Facebook Login Page</title>
<link href="fbstyle.css" rel="stylesheet" type="text/css">
</head>
<body>
<div id="fb-root"></div>
<script>
window.fbAsyncInit = function() {
FB.init({
appId : '[hidden]', // App ID
channelUrl : 'http://mysite/channel.html', // Channel File
status : true, // check login status
cookie : true, // enable cookies to allow the server to access the session
xfbml : true // parse XFBML
});
};
// Load the SDK Asynchronously
(function(d){
var js, id = 'facebook-jssdk', ref = d.getElementsByTagName('script')[0];
if (d.getElementById(id)) {return;}
js = d.createElement('script'); js.id = id; js.async = true;
js.src = "//connect.facebook.net/en_US/all.js";
ref.parentNode.insertBefore(js, ref);
}(document));
</script>
<div class="fb-login-button">Login with Facebook</div>
</body>
</html>
Here is the CSS that literally does nothing to move the above "login with facebook" text around the screen. All I'm seeing is regular text that says the above in the top left corner. No blue fb button
#charset "utf-8";
/* CSS Document */
*
{
margin: 0;
}
body
{
background-color: #FFF
}
#fb-login-button
{
position: relative;
float: right;
}
New code edit below from Purusottam's comments
again please forgive me for mistakes as I am a very new programmer.
the blue facebook login button is still not showing up only the "login with facebook" text in the upper left corner: see the image attached.
again I'm working completely local here..do I need to have all the files on a server for this button to show up?
<html>
<head>
<title>My Facebook Login Page</title>
<link href="fbstyle.css" rel="stylesheet" type="text/css">
</head>
<body>
<div id="fb-root"></div>
<script>
window.fbAsyncInit = function() {
FB.init({
appId : 'hidden', // App ID
channelUrl : 'http://mysite.net/channel.html', // Channel File
status : true, // check login status
cookie : true, // enable cookies to allow the server to access the session
xfbml : true, // parse XFBML
oauth : true});
};
// Load the SDK Asynchronously
(function() {
var e = document.createElement('script');
e.type = 'text/javascript';
e.src = document.location.protocol +
'//connect.facebook.net/en_US/all.js';
e.async = true;
document.getElementById('fb-root').appendChild(e);
}());
</script>
<div class="fb-login-button" show-faces="true" width="200" max-rows="5">Login with Facebook</div>
<script>
FB.login(function(response)
{
if (response.authResponse)
{
//login success
}
else
{
alert('User cancelled login or did not fully authorize.');
}
}, {scope: 'permissions that app needs'})
</script>
</body>
this is the current result:
http://s17.postimage.org/y8oz0htq7/help.jpg
As it turns out the reason this button wasn't showing up was because you need to have everything on a server. You can't test the facebook code local.
As I see your code there are couple of things that are missing. First you need to initialize oauth with FB. Below is the reference to the code.
window.fbAsyncInit = function() {
FB.init({appId: "hidden",
channelUrl : "Channel File",
status: true,
cookie: true,
xfbml: true,
oauth:true});
Loading of SDK will be simple as below.
(function() {
var e = document.createElement('script');
e.type = 'text/javascript';
e.src = document.location.protocol +
'//connect.facebook.net/en_US/all.js';
e.async = true;
document.getElementById('fb-root').appendChild(e);
}());
Once this is done then onclick of your login DIV button call a javascript function with following code.
FB.login(function(response)
{
if (response.authResponse)
{
//login success
}
else
{
alert('User cancelled login or did not fully authorize.');
}
}, {scope: 'permissions that app needs'})
Hope this helps you.