打印DIV内容的最佳方法是什么?
当前回答
将Element传递给这个函数打印:
函数printElm(elm) { var orig = document.body.innerHTML; document.body.innerHTML = elm.outerHTML; print (); document.body.innerHTML = origin; }
其他回答
我认为有更好的解决办法。让你的div打印覆盖整个文档,但只在打印时:
@media print {
.myDivToPrint {
background-color: white;
height: 100%;
width: 100%;
position: fixed;
top: 0;
left: 0;
margin: 0;
padding: 15px;
font-size: 14px;
line-height: 18px;
}
}
公认的解决方案不起作用。Chrome打印了一个空白页面,因为它没有及时加载图像。这种方法是有效的:
编辑:看来接受的解决方案在我发布后被修改了。为什么会投反对票?这个解决方案也同样有效。
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;
}
我修改了@BillPaetski答案使用querySelector,添加可选的CSS,删除强制H1标签,并使标题可选地指定或从窗口拉出。它也不再自动打印,并公开内部内容,以便它们可以在包装器函数中切换或随你喜欢。
仅有的两个私有变量是tmpWindow和tmpDoc,尽管我相信标题,css和elem访问可能会有所不同,但应该假设所有函数参数都是私有的。
Code:function PrintElem(elem, title, css) {
var tmpWindow = window.open('', 'PRINT', 'height=400,width=600');
var tmpDoc = tmpWindow.document;
title = title || document.title;
css = css || "";
this.setTitle = function(newTitle) {
title = newTitle || document.title;
};
this.setCSS = function(newCSS) {
css = newCSS || "";
};
this.basicHtml5 = function(innerHTML) {
return '<!doctype html><html>'+(innerHTML || "")+'</html>';
};
this.htmlHead = function(innerHTML) {
return '<head>'+(innerHTML || "")+'</head>';
};
this.htmlTitle = function(title) {
return '<title>'+(title || "")+'</title>';
};
this.styleTag = function(innerHTML) {
return '<style>'+(innerHTML || "")+'</style>';
};
this.htmlBody = function(innerHTML) {
return '<body>'+(innerHTML || "")+'</body>';
};
this.build = function() {
tmpDoc.write(
this.basicHtml5(
this.htmlHead(
this.htmlTitle(title) + this.styleTag(css)
) + this.htmlBody(
document.querySelector(elem).innerHTML
)
)
);
tmpDoc.close(); // necessary for IE >= 10
};
this.print = function() {
tmpWindow.focus(); // necessary for IE >= 10*/
tmpWindow.print();
tmpWindow.close();
};
this.build();
return this;
}
Usage:
DOMPrinter = PrintElem('#app-container');
DOMPrinter.print();
下面的代码复制了查询选择器目标的所有相关节点,复制了它们在屏幕上看到的样式,因为许多用于css选择器目标的父元素将会丢失。如果有很多带有很多样式的子节点,这将导致一些延迟。
理想情况下,你应该有一个打印样式表,但这是为用例,没有打印样式表插入,你希望打印在屏幕上看到。
如果您在此页的浏览器控制台中复制以下项目,它将打印此页上的所有代码片段。
+function() {
/**
* copied from https://stackoverflow.com/questions/19784064/set-javascript-computed-style-from-one-element-to-another
* @author Adi Darachi https://stackoverflow.com/users/2318881/adi-darachi
*/
var copyComputedStyle = function(from,to){
var computed_style_object = false;
//trying to figure out which style object we need to use depense on the browser support
//so we try until we have one
computed_style_object = from.currentStyle || document.defaultView.getComputedStyle(from,null);
//if the browser dose not support both methods we will return null
if(!computed_style_object) return null;
var stylePropertyValid = function(name,value){
//checking that the value is not a undefined
return typeof value !== 'undefined' &&
//checking that the value is not a object
typeof value !== 'object' &&
//checking that the value is not a function
typeof value !== 'function' &&
//checking that we dosent have empty string
value.length > 0 &&
//checking that the property is not int index ( happens on some browser
value != parseInt(value)
};
//we iterating the computed style object and compy the style props and the values
for(property in computed_style_object)
{
//checking if the property and value we get are valid sinse browser have different implementations
if(stylePropertyValid(property,computed_style_object[property]))
{
//applying the style property to the target element
to.style[property] = computed_style_object[property];
}
}
};
// Copy over all relevant styles to preserve styling, work the way down the children tree.
var buildChild = function(masterList, childList) {
for(c=0; c<masterList.length; c++) {
var master = masterList[c];
var child = childList[c];
copyComputedStyle(master, child);
if(master.children && master.children.length > 0) {
buildChild(master.children, child.children);
}
}
}
/** select elements to print with query selector **/
var printSelection = function(querySelector) {
// Create an iframe to make sure everything is clean and ordered.
var iframe = document.createElement('iframe');
// Give it enough dimension so you can visually check when modifying.
iframe.width = document.width;
iframe.height = document.height;
// Add it to the current document to be sure it has the internal objects set up.
document.body.append(iframe);
var nodes = document.querySelectorAll(querySelector);
if(!nodes || nodes.length == 0) {
console.error('Printing Faillure: Nothing to print. Please check your querySelector');
return;
}
for(i=0; i < nodes.length; i++) {
// Get the node you wish to print.
var origNode = nodes[i];
// Clone it and all it's children
var node = origNode.cloneNode(true);
// Copy the base style.
copyComputedStyle(origNode, node);
if(origNode.children && origNode.children.length > 0) {
buildChild(origNode.children, node.children);
}
// Add the styled clone to the iframe. using contentWindow.document since it seems the be the most widely supported version.
iframe.contentWindow.document.body.append(node);
}
// Print the window
iframe.contentWindow.print();
// Give the browser a second to gather the data then remove the iframe.
window.setTimeout(function() {iframe.parentNode.removeChild(iframe)}, 1000);
}
window.printSelection = printSelection;
}();
printSelection('.default.prettyprint.prettyprinted')
使用Jquery,简单地使用这个函数:
<script>
function printContent(el){
var restorepage = $('body').html();
var printcontent = $('#' + el).clone();
$('body').empty().html(printcontent);
window.print();
$('body').html(restorepage);
}
</script>
你的打印按钮看起来是这样的:
<button id="print" onclick="printContent('id name of your div');" >Print</button>
编辑:如果你有表单数据,你需要保留,克隆不会复制,所以你只需要抓取所有的表单数据,并在恢复后替换它如下:
<script>
function printContent(el){
var restorepage = $('body').html();
var printcontent = $('#' + el).clone();
var enteredtext = $('#text').val();
$('body').empty().html(printcontent);
window.print();
$('body').html(restorepage);
$('#text').html(enteredtext);
}
</script>
<textarea id="text"></textarea>
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