htmlToPdf.js
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import html2Canvas from "html2canvas";
import JsPDF from "jspdf";
import { Loading } from "element-ui"; //此处根据你实际使用的框架的loading进行引入
let loading;
export default {
install(Vue, options) {
Vue.prototype.getPdf = function (pdfTitle) {
loading = Loading.service({
lock: true,
text: "正在下载pdf...",
background: "rgba(0,500,200,.5)"
});
html2Canvas(document.querySelector("#pdfDom"), {
allowTaint: true,
useCORS: true
}).then(function (canvas) {
loading.close();
let contentWidth = canvas.width;
let contentHeight = canvas.height;
let pageHeight = (contentWidth / 592.28) * 841.89;
let leftHeight = contentHeight;
let position = 0;
let imgWidth = 595.28;
let imgHeight = (592.28 / contentWidth) * contentHeight;
let pageData = canvas.toDataURL("image/jpeg", 1.0);
let PDF = new JsPDF("", "pt", "a4");
if (leftHeight < pageHeight) {
PDF.addImage(pageData, "JPEG", 0, 0, imgWidth, imgHeight);
} else {
while (leftHeight > 0) {
PDF.addImage(pageData, "JPEG", 0, position, imgWidth, imgHeight);
leftHeight -= pageHeight;
position -= 841.89;
if (leftHeight > 0) {
PDF.addPage();
}
}
}
PDF.save(pdfTitle + ".pdf");
});
};
}
};