使用html2canvas將頁面轉換成圖並使用用canvas2image下載

之前在網路上找到一個用<a> 的download屬性下載的方法，確實很簡單也很方便，但此方法不支援IE，無奈又找到另一個方法。

本例所使用的版本：

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安裝

 npm install html2canvas canvas2image --save

引入

 import html2canvas from 'html2canvas';require('./canvas2image.js');

canvas2image.js 需要改動一下，以便綁在window上

 (function($){ Canvas2Image = function () { ... }}

_dataURL 可以用來回顯，Canvas2Image.saveAsPNG(canvas) 會直接下載。

Canvas2Image提供了以下幾種方法:

 Canvas2Image.saveAsImage(canvasObj, width, height, type)Canvas2Image.saveAsPNG(canvasObj, width, height)Canvas2Image.saveAsJPEG(canvasObj, width, height)Canvas2Image.saveAsJPEG(canvasObj, width, height)Canvas2Image.saveAsJPEG(canvasObj, width, height)Canvas2Image.saveAsJPEG(canvasObj, width, height)Canth, heightheights,m height)Canvas2Image.saveAsBMP(canvasObj, width, height)Canvas2Image.convertToImage(canvasObj, width, height, type)Canvas2Image.convertToPNG(canvasObj, height, type)Canvas2Image.convertToPNG(canvasObj, widvas, height, widvasth. height)Canvas2Image.convertToGIF(canvasObj, width, height)Canvas2Image.convertToBMP(canvasObj, width, height)

在vue中可以用$refs 確定DOM；

backgroundColor: null，此句可使轉出的圖沒有白邊

 methods: { toImage() { let _this = this; html2canvas(this.$refs.index,{ backgroundColor: null }).then((canvas) =​​> { let _dataURL = canvas.toDataURL(image/png); // _this.dataURL = _dataURL; Canvas2Image.saveAsPNG(canvas) }); },

以上就是本文的全部內容，希望對大家的學習有所幫助，也希望大家多多支持VeVb武林網。