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update to adape es6 and changeable width and height #2

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update to adape es6 and changeable width and height #2

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34 changes: 10 additions & 24 deletions main.js
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Original file line number Diff line number Diff line change
@@ -1,35 +1,21 @@
document.getElementById("btn-html2canvas").onclick = function(){

// 将 id 为 content 的 div 渲染成 canvas
html2canvas(document.getElementById("content"), {

let parent = document.getElementById("content")
let width = parent.offsetWidth;
let height = parent.offsetHeight
html2canvas(document.getElementById("content"))
,then(canvas => {
// 渲染完成时调用，获得 canvas
onrendered: function(canvas) {

// 从 canvas 提取图片数据
var imgData = canvas.toDataURL('image/jpeg');

var doc = new jsPDF("p", "mm", "a4");
// |
// |—————————————————————————————|
// A0 841×1189
// A1 594×841
// A2 420×594
// A3 297×420
// A4 210×297
// A5 148×210
// A6 105×148
// A7 74×105
// A8 52×74
// A9 37×52
// A10 26×37
// |——|———————————————————————————|
// |——|——|
// | |
doc.addImage(imgData, 'JPEG', 0, 0,210,297);
var doc = new jsPDF("p", "mm", [width, height]);

doc.save('content.pdf');
}
});
doc.addImage(imgData, 'JPEG', 0, 0,width, height);

doc.save('content.pdf');

})
}