打印DIV内容的最佳方法是什么?
当前回答
下面是一个适用于IE和Chrome的IFrame解决方案:
function printHTML(htmlString) {
var newIframe = document.createElement('iframe');
newIframe.width = '1px';
newIframe.height = '1px';
newIframe.src = 'about:blank';
// for IE wait for the IFrame to load so we can access contentWindow.document.body
newIframe.onload = function() {
var script_tag = newIframe.contentWindow.document.createElement("script");
script_tag.type = "text/javascript";
var script = newIframe.contentWindow.document.createTextNode('function Print(){ window.focus(); window.print(); }');
script_tag.appendChild(script);
newIframe.contentWindow.document.body.innerHTML = htmlString;
newIframe.contentWindow.document.body.appendChild(script_tag);
// for chrome, a timeout for loading large amounts of content
setTimeout(function() {
newIframe.contentWindow.Print();
newIframe.contentWindow.document.body.removeChild(script_tag);
newIframe.parentElement.removeChild(newIframe);
}, 200);
};
document.body.appendChild(newIframe);
}
其他回答
在Opera中,试试:
print_win.document.write('</body></html>');
print_win.document.close(); // This bit is important
print_win.print();
print_win.close();
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')
创建一些通用的东西用于任何HTML元素
HTMLElement.prototype.printMe = printMe;
function printMe(query){
var myframe = document.createElement('IFRAME');
myframe.domain = document.domain;
myframe.style.position = "absolute";
myframe.style.top = "-10000px";
document.body.appendChild(myframe);
myframe.contentDocument.write(this.innerHTML) ;
setTimeout(function(){
myframe.focus();
myframe.contentWindow.print();
myframe.parentNode.removeChild(myframe) ;// remove frame
},3000); // wait for images to load inside iframe
window.focus();
}
//usage
document.getElementById('xyz').printMe();
document.getElementsByClassName('xyz')[0].printMe();
希望这能有所帮助。
注意:从下面提到的插件编写到现在已经有13年了,就像评论中提到的那样。它不再工作,因为改变了API在jQuery。随意分叉和添加一个拉请求!
虽然这是@gabe说的, 如果你正在使用jQuery,你可以使用我的printElement插件。
这里有一个示例,以及关于插件的更多信息。
使用方法相当简单,只需用jQuery选择器抓取一个元素并打印它:
$("#myDiv").printElement();
我希望这能有所帮助!
我编写了一个插件来解决这种情况。我对现有的插件不满意,开始做一些更广泛/可配置的东西。
https://github.com/jasonday/printThis
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