How to print selected portion of HTML page?
Question
I was trying to print selected <div> tags in HTML. I tried using CSS like this:
<style media="print">
.onlyscreen {
display: none;
}
</style>
<html>
<body>
<div class="onlyscreen">
<p>Hello</p>
<div>
<p> Inner tag</p>
</div>
</div>
<input type="submit" value="Print Report" onclick="window.print()">
</body>
</html>
"Inner tag" is not printed. This is a useful technique, but it fails when there are layered <div> tags.
I also tried this JavaScript:
function printContent(id) {
str = document.getElementById(id).innerHTML;
newwin = window.open('', 'printwin', 'left=100,top=100,width=400,height=400');
newwin.document.write('<HTML>\n<HEAD>\n');
newwin.document.write('<TITLE>Report</TITLE>\n');
newwin.document.write('<script>\n');
newwin.document.write('function chkstate(){\n');
newwin.document.write('if(document.readyState=="complete"){\n');
newwin.document.write('window.close()\n');
newwin.document.write('}\n');
newwin.document.write('else{\n');
newwin.document.write('setTimeout("chkstate()",2000)\n');
newwin.document.write('}\n');
newwin.document.write('}\n');
newwin.document.write('function print_win(){\n');
newwin.document.write('window.print();\n');
newwin.document.write('chkstate();\n');
newwin.document.write('}\n');
newwin.document.write('<\/script>\n');
newwin.document.write('</HEAD>\n');
newwin.document.write('<BODY onload="print_win()">\n');
newwin.document.write(str);
newwin.document.write('</BODY>\n');
newwin.document.write('</HTML>\n');
newwin.document.close();
}
And then calling this function by onclick . This script works fine with one <div> tag but not with mulitple tags. For example
<html>
<body>
<div id="print_thistag">
<p>Hello</p>
</div>
<div id="print_thistag">
<p>User</p>
</div>
<input type="submit" value="Print Report" onclick="printContent('print_thistag')">
</body>
</html>
Only "Hello" gets printed. What should I do in such cases?
1 answers
solution1
7 ACCPTED 2011-11-17 01:01:49
Basically the problem is that your printContent function is designed in such way that it works only with a single element.
You can alter your function, so it will accept not the id of the element but the css class name as in the following sample
function printContent(className) {
var matchedElements = document.getElementsByClassName(className);
var str = '';
for (var i = 0; i < matchedElements.length; i++) {
var str = str + matchedElements[i].innerHTML;
}
var newwin = window.open('', 'printwin', 'left=100,top=100,width=400,height=400');
newwin.document.write('<HTML>\n<HEAD>\n');
newwin.document.write('<TITLE>Report</TITLE>\n');
newwin.document.write('<script>\n');
newwin.document.write('function chkstate(){\n');
newwin.document.write('if(document.readyState=="complete"){\n');
newwin.document.write('window.close()\n');
newwin.document.write('}\n');
newwin.document.write('else{\n');
newwin.document.write('setTimeout("chkstate()",2000)\n');
newwin.document.write('}\n');
newwin.document.write('}\n');
newwin.document.write('function print_win(){\n');
newwin.document.write('window.print();\n');
newwin.document.write('chkstate();\n');
newwin.document.write('}\n');
newwin.document.write('<\/script>\n');
newwin.document.write('</HEAD>\n');
newwin.document.write('<BODY onload="print_win()">\n');
newwin.document.write(str);
newwin.document.write('</BODY>\n');
newwin.document.write('</HTML>\n');
newwin.document.close();
}
You'll also need to alter html a bit
<html>
<body>
<div class="print_thistag">
<p>Hello</p>
</div>
<div class="print_thistag">
<p>User</p>
</div>
<input type="submit" value="Print Report" onclick="printContent('print_thistag');">
</body>
</html>
It will work as you expected - aggregate every div content into a single html string which will be printed.
By the way assigning the same id for the multiple elements is not a good practice - the id should be unique and if you want to group elements somehow - you can just add the same class for those elements as in the sample above.
The technical post webpages of this site follow the CC BY-SA 4.0 protocol. If you need to reprint, please indicate the site URL or the original address.Any question please contact:yoyou2525@163.com.