vue打印图片
element 中图片打印
[vue element 如何打印弹窗里的内容 无效](https://segmentfault.com/q/1010000015097252)
问题：
第一次能打开打印界面，但是关闭后，就无法第二次打开了，而且页面也无法进行任何操作。
残缺解决：
innerHMTL会造成绑定丢失，可以window.open('')，写入document.write(dialogdome)打开新页面来打印，就是体验...，
或者尝试将其它元素隐藏
printJS
printJS有很多个版本，官方给定的vue中可以使用，但使用有限，配合若依时侧边栏会被隐藏打印
十分推荐这个大佬解释的
本文下方提供可直接使用的vue版本的printJS--来源于gitHub
// 打印类属性、方法定义
/* eslint-disable */
const Print = function (dom, options) {
if (!(this instanceof Print)) return new Print(dom, options);
this.options = this.extend({
'noPrint': '.no-print'
}, options);
if ((typeof dom) === "string") {
this.dom = document.querySelector(dom);
} else {
this.isDOM(dom)
this.dom = this.isDOM(dom) ? dom : dom.$el;
}
this.init();
};
Print.prototype = {
init: function () {
var content = this.getStyle() + this.getHtml();
this.writeIframe(content);
},
extend: function (obj, obj2) {
for (var k in obj2) {
obj[k] = obj2[k];
}
return obj;
},
getStyle: function () {
var str = "",
styles = document.querySelectorAll('style,link');
for (var i = 0; i < styles.length; i++) {
str += styles[i].outerHTML;
}
str += "<style>" + (this.options.noPrint ? this.options.noPrint : '.no-print') + "{display:none;}</style>";
// str += "<style>html,body,div{height: auto!important;font-size:14px}</style>";
return str;
},
getHtml: function () {
var inputs = document.querySelectorAll('input');
var textareas = document.querySelectorAll('textarea');
var selects = document.querySelectorAll('select');
for (var k = 0; k < inputs.length; k++) {
if (inputs[k].type == "checkbox" || inputs[k].type == "radio") {
if (inputs[k].checked == true) {
inputs[k].setAttribute('checked', "checked")
} else {
inputs[k].removeAttribute('checked')
}
} else if (inputs[k].type == "text") {
inputs[k].setAttribute('value', inputs[k].value)
} else {
inputs[k].setAttribute('value', inputs[k].value)
}
}
for (var k2 = 0; k2 < textareas.length; k2++) {
if (textareas[k2].type == 'textarea') {
textareas[k2].innerHTML = textareas[k2].value
}
}
for (var k3 = 0; k3 < selects.length; k3++) {
if (selects[k3].type == 'select-one') {
var child = selects[k3].children;
for (var i in child) {
if (child[i].tagName == 'OPTION') {
if (child[i].selected == true) {
child[i].setAttribute('selected', "selected")
} else {
child[i].removeAttribute('selected')
}
}
}
}
}
// 包裹要打印的元素
// fix: https://github.com/xyl66/vuePlugs_printjs/issues/36
let outerHTML = this.wrapperRefDom(this.dom).outerHTML
return outerHTML;
},
// 向父级元素循环，包裹当前需要打印的元素
// 防止根级别开头的 css 选择器不生效
wrapperRefDom: function (refDom) {
let prevDom = null
let currDom = refDom
// 判断当前元素是否在 body 中，不在文档中则直接返回该节点
if (!this.isInBody(currDom)) return currDom
while (currDom) {
if (prevDom) {
let element = currDom.cloneNode(false)
element.appendChild(prevDom)
prevDom = element
} else {
prevDom = currDom.cloneNode(true)
}
currDom = currDom.parentElement
}
return prevDom
},
writeIframe: function (content) {
var w, doc, iframe = document.createElement('iframe'),
f = document.body.appendChild(iframe);
iframe.id = "myIframe";
//iframe.style = "position:absolute;width:0;height:0;top:-10px;left:-10px;";
iframe.setAttribute('style', 'position:absolute;width:0;height:0;top:-10px;left:-10px;');
w = f.contentWindow || f.contentDocument;
doc = f.contentDocument || f.contentWindow.document;
doc.open();
doc.write(content);
doc.close();
var _this = this
iframe.onload = function(){
_this.toPrint(w);
setTimeout(function () {
document.body.removeChild(iframe)
}, 100)
}
},
toPrint: function (frameWindow) {
try {
setTimeout(function () {
frameWindow.focus();
try {
if (!frameWindow.document.execCommand('print', false, null)) {
frameWindow.print();
}
} catch (e) {
frameWindow.print();
}
frameWindow.close();
}, 10);
} catch (err) {
console.log('err', err);
}
},
// 检查一个元素是否是 body 元素的后代元素且非 body 元素本身
isInBody: function (node) {
return (node === document.body) ? false : document.body.contains(node);
},
isDOM: (typeof HTMLElement === 'object') ?
function (obj) {
return obj instanceof HTMLElement;
} :
function (obj) {
return obj && typeof obj === 'object' && obj.nodeType === 1 && typeof obj.nodeName === 'string';
}
};
const MyPlugin = {}
MyPlugin.install = function (Vue, options) {
// 4. 添加实例方法
Vue.prototype.$print = Print
}
export default MyPlugin
vue项目中可直接使用，支持在Dialog中调用print无瑕疵
const Print = function (dom, options) {
if (!(this instanceof Print)) return new Print(dom, options);
this.options = this.extend({
noPrint: '.no-print',
onStart: function () {},
onEnd: function () {}
}, options);
if ((typeof dom) === "string") {
this.dom = document.querySelector(dom);
} else {
this.dom = dom;
}
this.init();
};
Print.prototype = {
init: function () {
let content = this.getStyle() + this.getHtml();
this.writeIframe(content);
},
extend: function (obj, obj2) {
for (let k in obj2) {
obj[k] = obj2[k];
}
return obj;
},
getStyle: function () {
let str = "";
let styles = document.querySelectorAll('style,link');
for (let i = 0; i < styles.length; i++) {
str += styles[i].outerHTML;
}
str += "<style>" + (this.options.noPrint ? this.options.noPrint : '.no-print') + "{display:none;}</style>";
return str;
},
getHtml: function () {
let inputs = document.querySelectorAll('input');
let textareas = document.querySelectorAll('textarea');
let selects = document.querySelectorAll('select');
for (let k in inputs) {
if (inputs[k].type === "checkbox" || inputs[k].type === "radio") {
if (inputs[k].checked === true) {
inputs[k].setAttribute('checked', "checked");
} else {
inputs[k].removeAttribute('checked');
}
} else if (inputs[k].type === "text") {
inputs[k].setAttribute('value', inputs[k].value);
}
}
for (let k2 in textareas) {
if (textareas[k2].type === 'textarea') {
textareas[k2].innerHTML = textareas[k2].value;
}
}
for (let k3 in selects) {
if (selects[k3].type === 'select-one') {
let child = selects[k3].children;
for (let i in child) {
if (child[i].tagName === 'OPTION') {
if (child[i].selected === true) {
child[i].setAttribute('selected', "selected");
} else {
child[i].removeAttribute('selected');
}
}
}
}
}
return this.dom.outerHTML;
},
writeIframe: function (content) {
let w;
let doc;
let iframe = document.createElement('iframe');
let f = document.body.appendChild(iframe);
iframe.id = "myIframe";
iframe.style = "position:absolute;width:0;height:0;top:-10px;left:-10px;";
w = f.contentWindow || f.contentDocument;
doc = f.contentDocument || f.contentWindow.document;
doc.open();
doc.write(content);
doc.close();
this.toPrint(w, function () {
document.body.removeChild(iframe);
});
},
toPrint: function (w, cb) {
let _this = this;
w.onload = function () {
try {
setTimeout(function () {
w.focus();
typeof _this.options.onStart === 'function' && _this.options.onStart();
if (!w.document.execCommand('print', false, null)) {
w.print();
}
typeof _this.options.onEnd === 'function' && _this.options.onEnd();
w.close();
cb && cb();
});
} catch (err) {
console.log('err', err);
}
};
}
};
const MyPlugin = {};
MyPlugin.install = function (Vue, options) {
// 4. 添加实例方法
Vue.prototype.$print = Print;
};
export default MyPlugin;
/* @Print.js
* DH (http://denghao.me)
* 2017-7-14
*/
(function (window, document) {
let Print = function (dom, options) {
if (!(this instanceof Print)) return new Print(dom, options);
this.options = this.extend({
noPrint: '.no-print',
onStart: function () {
},
onEnd: function () {
}
}, options);
if ((typeof dom) === "string") {
this.dom = document.querySelector(dom);
} else {
this.dom = dom;
}
this.init();
};
Print.prototype = {
init: function () {
let content = this.getStyle() + this.getHtml();
this.writeIframe(content);
},
extend: function (obj, obj2) {
for (let k in obj2) {
obj[k] = obj2[k];
}
return obj;
},
getStyle: function () {
let str = "",
styles = document.querySelectorAll('style,link');
for (let i = 0; i < styles.length; i++) {
str += styles[i].outerHTML;
}
str += "<style>" + (this.options.noPrint ? this.options.noPrint : '.no-print') + "{display:none;}</style>";
return str;
},
getHtml: function () {
let inputs = document.querySelectorAll('input');
let textareas = document.querySelectorAll('textarea');
let selects = document.querySelectorAll('select');
for (let k in inputs) {
if (inputs[k].type == "checkbox" || inputs[k].type == "radio") {
if (inputs[k].checked == true) {
inputs[k].setAttribute('checked', "checked")
} else {
inputs[k].removeAttribute('checked')
}
} else if (inputs[k].type == "text") {
inputs[k].setAttribute('value', inputs[k].value)
}
}
for (let k2 in textareas) {
if (textareas[k2].type == 'textarea') {
textareas[k2].innerHTML = textareas[k2].value
}
}
for (let k3 in selects) {
if (selects[k3].type == 'select-one') {
let child = selects[k3].children;
for (let i in child) {
if (child[i].tagName == 'OPTION') {
if (child[i].selected == true) {
child[i].setAttribute('selected', "selected")
} else {
child[i].removeAttribute('selected')
}
}
}
}
}
return this.dom.outerHTML;
},
writeIframe: function (content) {
let w, doc, iframe = document.createElement('iframe'),
f = document.body.appendChild(iframe);
iframe.id = "myIframe";
iframe.style = "position:absolute;width:0;height:0;top:-10px;left:-10px;";
w = f.contentWindow || f.contentDocument;
doc = f.contentDocument || f.contentWindow.document;
doc.open();
doc.write(content);
doc.close();
this.toPrint(w, function () {
document.body.removeChild(iframe)
});
},
toPrint: function (w, cb) {
let _this = this;
w.onload = function () {
try {
setTimeout(function () {
w.focus();
typeof _this.options.onStart === 'function' && _this.options.onStart();
if (!w.document.execCommand('print', false, null)) {
w.print();
}
typeof _this.options.onEnd === 'function' && _this.options.onEnd();
w.close();
cb && cb()
});
} catch (err) {
console.log('err', err);
}
}
}
};
window.Print = Print;
}(window, document));
vue+element-ui前端使用print-js实现打印功能(可自定义样式)
printNb
printNb
存在跨域的BUG，就是link里边的样式路径必须是相对路径或者与站点同域，否则会垮掉。
因为本地调试和测试环境都没问题。所以一直也就没有发现BUG。直到上线后，再测试才发现问题。因为生产环境CSS是走CDN的，域名不一致了，导致JS报错。打印功能垮掉。
windows.print的回调
残缺 web端js调用window.print()的回调函数（打印前和打印后的回调）
新建页面，在新页面中使用printJS完全可以避免很多意想不到的样式问题
在若依中可另类解决打印时出现侧边栏，但不想在打印预览页面看到侧边栏的方法
# 在method钩子函数中
// hiddenSide 为boolean值 可控制侧边栏的收缩与展开
toggleSideBar(hiddenSide) {
// 这个方法可控制侧边栏的收缩与展开
this.$store.dispatch('app/toggleSideBar',hiddenSide)
// 这个方法可以直接将侧边栏去掉不显示
//this.$store.dispatch('app/toggleSideBarHide',false)
},
如何关闭打印预览
如何硬要实现的话，请问怎么实现？
更多技巧
在页面渲染完成之后调用打印
使用
printFun(){
let _this = this
// isShow 使用的 v-show
_this.isShow = true
//页面渲染完成之后 调用打印
this.$nextTick(()=>{
_this.$print(this.$refs.printImages,{
noPrint: '.noPrint',
onStart: () => {
},
onEnd: () => {
//在打印预览页面无论点击【打印】还是【取消】 都执行选中的图片列表清空
_this.handleclearCheckList()
}
})
})
},
