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I have an old javascript code to print images, if a user clicks on the thumbnail. It used to work just fine, but lately (only in Chrome!) there is a blank page in preview.
Here is a demonstration in JsBin: http://jsbin.com/yehefuwaso/7 Click the printer icon. Now try it in Firefox; it will work as expected.
Chrome: 41.0.2272.89 m
Firefox: 30.0, 36.0.1
function newWindow(src){
win = window.open("","","width=600,height=600");
var doc = win.document;
// init head
var head = doc.getElementsByTagName("head")[0];
// create title
var title = doc.createElement("title");
title.text = "Child Window";
head.appendChild(title);
// create script
var code = "function printFunction() { window.focus(); window.print(); }";
var script = doc.createElement("script");
script.text = code;
script.type = "text/javascript";
head.appendChild(script);
// init body
var body = doc.body;
//image
doc.write('<img src="'+src+'" width="300">');
//chrome
if (navigator.userAgent.toLowerCase().indexOf('chrome') > -1) {
win.printFunction();
} else {
win.document.close();
win.focus();
win.print();
win.close();
}
}
572
It looks like it's attempting to print before the <img> has loaded, move the call to print inside an event handler for the load event of window by opening the link as a data URI or Blob, for example
var code = '\
<html>\
<head>\
<title></title>\
<script>\
function printFunction() {\
window.focus();\
window.print();\
window.close();\
}\
window.addEventListener(\'load\', printFunction);\
</script>\
</head>\
<body><img src="'+src+'" width="300"></body>\
</html>';
window.open('data:text/html,' + code, '_blank', 'width=600,height=600');
Don't forget you may need to HTML encode the tags in code
You could probably just listen for load on the <img> instead, but if you ever do anything more complicated than tring to print a single image you may find it breaks again in future
doc.write('<img onload="printFunction();" src="'+src+'" width="300">');
Where printFunction is the print function for all browsers
59
I encountered the same problem in Chrome. You can try these approaches, the first one worked for me. setTimeout didn't work for me (had to edit this later).
function printDiv(divName) {
var printContents = document.getElementById(divName).innerHTML;
w = window.open();
w.document.write(printContents);
w.document.write('<scr' + 'ipt type="text/javascript">' + 'window.onload = function() { window.print(); window.close(); };' + '</sc' + 'ript>');
w.document.close(); // necessary for IE >= 10
w.focus(); // necessary for IE >= 10
return true;
}
setTimeout:
<div id="printableArea">
<h1>Print me</h1>
</div>
<input type="button" onclick="printDiv('printableArea')" value="print a div!" />
function printDiv(divName) {
var printContents = document.getElementById(divName).innerHTML;
w = window.open();
w.document.write(printContents);
w.document.close(); // necessary for IE >= 10
w.focus(); // necessary for IE >= 10
setTimeout(function () { // necessary for Chrome
w.print();
w.close();
}, 0);
return true;
}
You need to wait for the image to finish loading:
var img = new Image();
img.src = src;
img.style.width = '300px';
img.onload = function(){
doc.write(img);
};
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