vue print.js打印支持Echarts图表操作
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2021-01-18
16:58:23
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vue print.js打印支持打印支持Echarts图表操作图表操作
网上找的print.js做了修改，支持Echarts图表这里记录一下，不知道是哪家的代码了，我看都一样
这里是看到了两个源码这里是看到了两个源码
https://github.com/xyl66/vuePlugs_printjs/blob/master/print.js
https://github.com/denghao123/Print.js
以下是我修改过的以下是我修改过的
print.js
// 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.notPrint ? this.options.notPrint : '.no-print') + "{display:none;}</style>";
str += "<style>.results{width:100%!important;} .result .title{width:100%;}</style>";
return str;
},
getHtml: function () {
var inputs = document.querySelectorAll('input');
var textareas = document.querySelectorAll('textarea');
var selects = document.querySelectorAll('select');
var canvass = document.querySelectorAll('canvas');
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')
}
}
}
}
}
//canvass echars图表转为图片
for (var k4 = 0; k4 < canvass.length; k4++) {
var imageURL = canvass[k4].toDataURL("image/png");
var img = document.createElement("img");
img.src = imageURL;
img.setAttribute('style', 'max-width: 100%;');
img.className = 'isNeedRemove'
// canvass[k4].style.display = 'none'
// canvass[k4].parentNode.style.width = '100%'
// canvass[k4].parentNode.style.textAlign = 'center'
canvass[k4].parentNode.insertBefore(img,canvass[k4].nextElementSibling);
}
//做分页
//style="page-break-after: always"
var pages = document.querySelectorAll('.result');
for (var k5 = 0; k5 < pages.length; k5++) {
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