sheetjs/demos/angular/README.md

Angular 1

The xlsx.core.min.js and xlsx.full.min.js scripts are designed to be dropped into web pages with script tags:

<script src="xlsx.full.min.js"></script>

Strictly speaking, there should be no need for an angular demo! You can proceed as you would with any other browser-friendly library. To make this meaningful, we chose to show an integration with a common angular table component.

This demo uses angular-ui-grid to display a data table. The ui-grid does not provide any way to modify the import button, so the demo includes a simple directive for a HTML File Input control. It also includes a sample service for export which adds an item to the export menu.

Import Directive

A general import directive is fairly straightforward:

• Define the importSheetJs directive in the app:

app.directive("importSheetJs", [SheetJSImportDirective]);

• Add the attribute import-sheet-js="" to the file input element:

<input type="file" import-sheet-js="" multiple="false"  />

• Define the directive:

var SheetJSImportDirective = function() {
  return {
    scope: { },
    link: function ($scope, $elm, $attrs) {
      $elm.on('change', function (changeEvent) {
        var reader = new FileReader();

        reader.onload = function (e) {
          /* read workbook */
          var bstr = e.target.result;
          var workbook = XLSX.read(bstr, {type:'binary'});

          /* DO SOMETHING WITH workbook HERE */
        };

        reader.readAsBinaryString(changeEvent.target.files[0]);
      });
    }
  };
};

The demo SheetJSImportDirective follows the prescription from the README for File input controls using readAsBinaryString, converting to a suitable representation and updating the scope.

Export Service

An export can be triggered at any point! Depending on how data is represented, a workbook object can be built using the utility functions. For example, using an array of objects:

/* starting from this data */
var data = [
  { name: "Barack Obama", pres: 44 },
  { name: "Donald Trump", pres: 45 }
];

/* generate a worksheet */
var ws = XLSX.utils.json_to_sheet(data);

/* add to workbook */
var wb = XLSX.utils.book_new();
XLSX.utils.book_append_sheet(wb, ws, "Presidents");

/* write workbook (use type 'binary') */
var wbout = XLSX.write(wb, {bookType:'xlsx', type:'binary'});

/* generate a download */
function s2ab(s) {
  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;
}

saveAs(new Blob([s2ab(wbout)],{type:"application/octet-stream"}), "sheetjs.xlsx");

SheetJSExportService exposes export functions for XLSB and XLSX. Other formats are easily supported by changing the bookType variable. It grabs values from the grid, builds an array of arrays, generates a workbook and uses FileSaver to generate a download. By setting the filename and sheetname options in the ui-grid options, the output can be controlled.