使用html2canvas将页面转成图并使用用canvas2image下载

之前在网上找到一个用 <a> 的 download属性下载的方法,确实很简单也很方便,但此方法不支持IE,无奈又找到另一方法。

使用html2canvas将页面转成图,用canvas2image下载

本例使用的版本:

html2canvas@1.0.0-alpha.12 canvas2image@1.0.5

安装

npm install html2canvas canvas2image --save

引入

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

canvas2image.js 需要改动一下,以便绑在window上

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

_dataURL 可以用来回显,Canvas2Image.saveAsPNG(canvas) 会直接下载。

Canvas2Image提供了下面几种方法:

Canvas2Image.saveAsImage(canvasObj, width, height, type)Canvas2Image.saveAsPNG(canvasObj, width, height)Canvas2Image.saveAsJPEG(canvasObj, width, height)Canvas2Image.saveAsGIF(canvasObj, width, height)Canvas2Image.saveAsBMP(canvasObj, width, height)Canvas2Image.convertToImage(canvasObj, width, height, type)Canvas2Image.convertToPNG(canvasObj, width, height)Canvas2Image.convertToJPEG(canvasObj, width, height)Canvas2Image.convertToGIF(canvasObj, width, height)Canvas2Image.convertToBMP(canvasObj, width, height)

在vue中可以用$refs 确定DOM;

backgroundColor: null,此句可使转出的图没有白边

        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内容,希望对大家的学习有所帮助,也希望大家多多支持脚本之家。   

使用html2canvas将页面转成图并使用用canvas2image下载