How can I pop-up a print dialog box using Javascript?
Question
I have a page with a "Print" link that takes the user to a printer-friendly page. The client wants a print dialog box to appear automatically when the user arrives at the print-friendly page. How can I do this with javascript?
10 answers
solution1
262 ACCPTED 2008-10-28 03:44:54
window.print();
除非您的意思是自定义外观的弹出窗口。
solution2
42 2008-10-28 03:45:35
You could do
<body onload="window.print()">
...
</body>
solution3
22 2013-06-27 20:26:53
I like this, so that you can add whatever fields you want and print it that way.
function printPage() {
var w = window.open();
var headers = $("#headers").html();
var field= $("#field1").html();
var field2= $("#field2").html();
var html = "<!DOCTYPE HTML>";
html += '<html lang="en-us">';
html += '<head><style></style></head>';
html += "<body>";
//check to see if they are null so "undefined" doesnt print on the page. <br>s optional, just to give space
if(headers != null) html += headers + "<br/><br/>";
if(field != null) html += field + "<br/><br/>";
if(field2 != null) html += field2 + "<br/><br/>";
html += "</body>";
w.document.write(html);
w.window.print();
w.document.close();
};
solution4
5 2008-10-28 03:50:35
I do this to make sure they remember to print landscape, which is necessary for a lot of pages on a lot of printers.
<a href="javascript:alert('Please be sure to set your printer to Landscape.');window.print();">Print Me...</a>
or
<body onload="alert('Please be sure to set your printer to Landscape.');window.print();">
etc.
</body>
solution5
4 2019-05-24 16:43:40
如果您只有一个没有点击事件处理程序的链接：
<a href="javascript:window.print();">Print Page</a>
solution6
2 2019-11-14 07:56:30
I know the answer has already been provided. But I just wanted to elaborate with regards to doing this in a Blazor app (razor)...
You will need to inject IJSRuntime, in order to perform JSInterop (running javascript functions from C#)
IN YOUR RAZOR PAGE:
@inject IJSRuntime JSRuntime
Once you have that injected, create a button with a click event that calls a C# method:
<MatFAB Icon="@MatIconNames.Print" OnClick="@(async () => await print())"></MatFAB>
(or something more simple if you don't use MatBlazor)
<button @onclick="@(async () => await print())">PRINT</button>
For the C# method:
public async Task print()
{
await JSRuntime.InvokeVoidAsync("printDocument");
}
NOW IN YOUR index.html:
<script>
function printDocument() {
window.print();
}
</script>
Something to note, the reason the onclick events are asynchronous is because IJSRuntime awaits it's calls such as InvokeVoidAsync
PS: If you wanted to message box in asp net core for instance:
await JSRuntime.InvokeAsync<string>("alert", "Hello user, this is the message box");
To have a confirm message box:
bool question = await JSRuntime.InvokeAsync<bool>("confirm", "Are you sure you want to do this?");
if(question == true)
{
//user clicked yes
}
else
{
//user clicked no
}
Hope this helps :)
solution7
1 2017-11-05 01:30:07
您可以将其绑定到按钮或页面加载。
window.print();
solution8
0 2021-12-10 01:35:22
<script>
const _print = () => {
window.print();
}
</script>
or
<body onload="window.print();"></body>
see the documentation here : https://developer.mozilla.org/en-US/docs/Web/API/Window/print
solution9
0 2022-09-10 00:50:14
I know this is an old question, but after fighting with this a similar issue, I figured out a way to to open a print screen and NOT have to open a new tab, and not have to enable popups.
Hopefully this helps someone else.
/*
Example:
<a href="//example.com" class="print-url">Print</a>
*/
//LISTEN FOR PRINT URL ITEMS TO BE CLICKED
$(document).off('click.PrintUrl').on('click.PrintUrl', '.print-url', function(e){
//PREVENT OTHER CLICK EVENTS FROM PROPAGATING
e.preventDefault();
//TRY TO ASK THE URL TO TRIGGER A PRINT DIALOGUE BOX
printUrl($(this).attr('href'));
});
//TRIGGER A PRINT DIALOGE BOX FROM A URL
function printUrl(url) {
//CREATE A HIDDEN IFRAME AND APPEND IT TO THE BODY THEN WAIT FOR IT TO LOAD
$('<iframe src="'+url+'"></iframe>').hide().appendTo('body').on('load', function(){
var oldTitle = $(document).attr('title'); //GET THE ORIGINAL DOCUMENT TITLE
var that = $(this); //STORE THIS IFRAME AS A VARIABLE
var title = $(that).contents().find('title').text(); //GET THE IFRAME TITLE
$(that).focus(); //CALL THE IFRAME INTO FOCUS (FOR OLDER BROWSERS)
//SET THE DOCUMENT TITLE FROM THE IFRAME (THIS NAMES THE DOWNLOADED FILE)
if(title && title.length) $(document).attr('title', title);
//TRIGGER THE IFRAME TO CALL THE PRINT
$(that)[0].contentWindow.print();
//LISTEN FOR THE PRINT DIALOGUE BOX TO CLOSE
$(window).off('focus.PrintUrl').on('focus.PrintUrl', function(e){
e.stopPropagation(); //PREVENT OTHER WINDOW FOCUS EVENTS FROM RUNNING
$(that).remove(); //GET RID OF THE IFRAME
if(title && title.length) $(document).attr('title', oldTitle); //RESET THE PAGE TITLE
$(window).off('focus.PrintUrl'); //STOP LISTENING FOR WINDOW FOCUS
});
});
};
solution10
-6 2016-07-28 11:40:15
if problem:
mywindow.print();
altenative using:
'<scr'+'ipt>print()</scr'+'ipt>'
Full:
$('.print-ticket').click(function(){
var body = $('body').html();
var ticket_area = '<aside class="widget tickets">' + $('.widget.tickets').html() + '</aside>';
$('body').html(ticket_area);
var print_html = '<html lang="tr">' + $('html').html() + '<scr'+'ipt>print()</scr'+'ipt>' + '</html>';
$('body').html(body);
var mywindow = window.open('', 'my div', 'height=600,width=800');
mywindow.document.write(print_html);
mywindow.document.close(); // necessary for IE >= 10'</html>'
mywindow.focus(); // necessary for IE >= 10
//mywindow.print();
mywindow.close();
return true;
});
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