前端会有将局部网页转成pdf并且下载到本地的需求。如下操作即可:
引入插件
<script>
function jsPdfDownload(){
let pdfName =document.getElementById('name').innerHTML;
let id = "poster-content";
var target = document.getElementById(id);
target.style.background = "#FFFFFF";
if(pdfName==''||pdfName==undefined) {
pdfName = "测试";
};
html2canvas(target, {
onrendered:function(canvas) {
debugger
var contentWidth = canvas.width;
var contentHeight = canvas.height;
//一页pdf显示html页面生成的canvas高度;
var pageHeight = contentWidth / 592.28 * 841.89;
//未生成pdf的html页面高度
var leftHeight = contentHeight;
//页面偏移
var position = 0;
//a4纸的尺寸[595.28,841.89], html 页面生成的canvas在pdf中图片的宽高
var imgWidth = 555.28;//595.28//左右边距20
var imgHeight = 552.28/contentWidth * contentHeight;//左右边距20
var pageData = canvas.toDataURL('image/jpeg', 1.0);
var pdf = new jsPDF('', 'pt', 'a4');
//有两个高度需要区分,一个是html页面的实际高度,和生成pdf的页面高度(841.89)
//当内容未超过pdf一页显示的范围,无需分页
if (leftHeight < pageHeight) {
//位置可以调整,如边距20,已到达最佳效果
pdf.addImage(pageData, 'JPEG', 20, 0, imgWidth, imgHeight );//左右边距20
} else {
while(leftHeight > 0) {
pdf.addImage(pageData, 'JPEG', 20, position, imgWidth, imgHeight)//左右边距20
leftHeight -= pageHeight;
position -= 841.89;
//避免添加空白页
if(leftHeight > 0) {
pdf.addPage();
}
}
}
pdf.save(pdfName+".pdf");
}
})
}
$(document).off('click','.js_resume-preview').on('click','.js_resume-preview',function(){
jsPdfDownload();
})
</script>
原文链接: