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 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:

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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)

        });

    },

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