Javascript - export image into excel

Using this function, I can export image into excel(XLS). This code require physical location of the image. But instead of physical path, I want to pass dataUri of the image. e.g. data:image/jpeg;base64,/9j/4AAQSkZJRgABAQAAAQABAA...

Is it possible?

function exportExcel() {

    var template = { excel: '<html xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:x="urn:schemas-microsoft-com:office:excel" xmlns="http://www.w3.org/TR/REC-html40"><head><meta name=ProgId content=Excel.Sheet> <meta name=Generator content="Microsoft Excel 11"><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><!--[if gte mso 9]><xml><x:ExcelWorkbook><x:ExcelWorksheets><x:ExcelWorksheet><x:Name>{worksheet}</x:Name><x:WorksheetOptions><x:DisplayGridlines/></x:WorksheetOptions></x:ExcelWorksheet></x:ExcelWorksheets></x:ExcelWorkbook></xml><![endif]--></head><body><table>{table}</table></body></html>' };

    var format = function (s, c) {
        return s.replace(new RegExp("{(\\w+)}", "g"), function (m, p) {
            return c[p];
        });
    };

    var base64 = function (s) {
        return window.btoa(window.unescape(encodeURIComponent(s)));
    };

    var ctx = { worksheet: 'Worksheet', table: '<img src="file://C:/Temp/chart.png" alt="" />' };

    var b64 = base64(format(template.excel, ctx));

    blob = b64toBlob(b64, 'application/vnd.ms-excel');
    var blobUrl = window.URL.createObjectURL(blob);

    var saveLink = document.createElement('a');

    saveLink.download = 'export.xls';
    saveLink.href = blobUrl;
    saveLink.click();
}


function b64toBlob(b64Data, contentType, sliceSize) {
    contentType = contentType || '';
    sliceSize = sliceSize || 512;

    var byteCharacters = window.atob(b64Data);
    var byteArrays = [];

    var offset;
    for (offset = 0; offset < byteCharacters.length; offset += sliceSize) {
        var slice = byteCharacters.slice(offset, offset + sliceSize);

        var byteNumbers = new Array(slice.length);
        var i;
        for (i = 0; i < slice.length; i = i + 1) {
            byteNumbers[i] = slice.charCodeAt(i);
        }

        var byteArray = new window.Uint8Array(byteNumbers);

        byteArrays.push(byteArray);
    }

    var blob = new window.Blob(byteArrays, {
        type: contentType
    });
    return blob;
}

Attached screenshot of requirement. enter image description here Thanks!

Try replacing the file url with the data url....

var ctx = { worksheet: 'Worksheet', table: '<img src="data:image/jpeg;base64,/9j/4AAQSkZJRgABAQAAAQABAA..." alt="" />' };

You can not export the image in base64 format to excel. Visit this page : https://www.infragistics.com/community/forums/f/ignite-ui-for-javascript/109480/adding-image-in-excel

来源：https://stackoverflow.com/questions/43925959/javascript-export-image-into-excel

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