sheetjs/demos/vue/SheetJS-vue.js
2017-07-06 14:55:10 -04:00

80 lines
2.4 KiB
JavaScript

var SheetJSFT = [
"xlsx", "xlsb", "xlsm", "xls", "xml", "csv", "txt", "ods", "fods", "uos", "sylk", "dif", "dbf", "prn", "qpw", "123", "wb*", "wq*", "html", "htm"
].map(function(x) { return "." + x; }).join(",");
var SJSTemplate = [
'<div>',
'<input type="file" multiple="false" id="sheetjs-input" accept="' + SheetJSFT + '" @change="onchange" />',
'<br/>',
'<button type="button" id="expor-table" style="visibility:hidden" @click="onexport">Export to XLSX</button>',
'<br/>',
'<div id="out-table"></div>',
'</div>'
].join("");
function s2ab(s) {
if(typeof ArrayBuffer !== 'undefined') {
var buf = new ArrayBuffer(s.length);
var view = new Uint8Array(buf);
for (var i=0; i!=s.length; ++i) view[i] = s.charCodeAt(i) & 0xFF;
return buf;
} else {
var buf = new Array(s.length);
for (var i=0; i!=s.length; ++i) buf[i] = s.charCodeAt(i) & 0xFF;
return buf;
}
}
Vue.component('html-preview', {
template: SJSTemplate,
methods: {
// as per: https://github.com/SheetJS/js-xlsx/wiki/Reading-XLSX-from-FileReader.readAsArrayBuffer()
// changing the readAsBinaryString (deprecated) to readAsArrayBuffer()
onchange: function(evt) {
var file;
var files = evt.target.files;
if (!files || files.length == 0) return;
file = files[0];
var reader = new FileReader();
reader.onload = function (e) {
// pre-process data
var binary = "";
var bytes = new Uint8Array(e.target.result);
var length = bytes.byteLength;
for (var i = 0; i < length; i++) {
binary += String.fromCharCode(bytes[i]);
}
/* read workbook */
var wb = XLSX.read(binary, {type: 'binary'});
/* grab first sheet */
var wsname = wb.SheetNames[0];
var ws = wb.Sheets[wsname];
/* generate HTML */
var HTML = XLSX.utils.sheet_to_html(ws);
/* update table */
document.getElementById('out-table').innerHTML = HTML;
/* show export button */
document.getElementById('expor-table').style.visibility = "visible";
};
reader.readAsArrayBuffer(file);
},
onexport: function(evt) {
/* generate workbook object from table */
var wb = XLSX.utils.table_to_book(document.getElementById('out-table'));
/* get binary string as output */
var wbout = XLSX.write(wb, { bookType: 'xlsx', type: 'binary' });
/* force a download */
saveAs(new Blob([s2ab(wbout)], { type: 'application/octet-stream' }), "sheetjs.xlsx");
}
}
});