Dhr*_*ruv 3 html javascript css
我试图<div>在HTML中打印选定的标签.我尝试使用这样的CSS:
<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>
不打印"内部标签".这是一种有用的技术,但是当有分层<div>标签时它会失败.
我也试过这个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();
}
然后通过调用此函数onclick.这个脚本适用于一个<div>标签但不适用于多个标签.例如
<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>
只打印"Hello".在这种情况下我该怎么办？
基本上问题是你的printContent函数的设计方式只能使用单个元素.
您可以更改您的函数,因此它将不接受元素的id,而是接受css类名称,如以下示例所示
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();
}
你还需要改变一下html
<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>
它将按预期工作 - 将每个div内容聚合为一个将打印的单个html字符串.
顺便说一句,为多个元素分配相同的id并不是一个好习惯 - id应该是唯一的,如果你想以某种方式对元素进行分组 - 你可以为这些元素添加相同的类,如上例所示.