forked from sheetjs/sheetjs
72 lines
2.5 KiB
Markdown
72 lines
2.5 KiB
Markdown
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# Google Sheet Demo
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This demo is using [`drive-db`](https://github.com/franciscop/drive-db) to fetch a public Google Sheet and then `xlsx` to save the data locally as `test.xlsx`.
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It uses modern Javascript; `import/export`, `async/away`, etc. To run this you need Node.js 12 or newer, and you will notice we added `"type": "module"` to the `package.json`.
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Here is the full code:
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```js
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import xlsx from "xlsx";
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import drive from "drive-db";
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(async () => {
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const data = await drive("1fvz34wY6phWDJsuIneqvOoZRPfo6CfJyPg1BYgHt59k");
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/* Create a new workbook */
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const workbook = xlsx.utils.book_new();
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/* make worksheet */
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const worksheet = xlsx.utils.json_to_sheet(data);
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/* Add the worksheet to the workbook */
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xlsx.utils.book_append_sheet(workbook, worksheet);
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xlsx.writeFile(workbook, "test.xlsx");
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})();
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```
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Let's go over the different parts:
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```js
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import xlsx from "xlsx";
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import drive from "drive-db";
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```
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This imports both `xlsx` and `drive-db` libraries. While these are written in commonjs, Javascript Modules can usually import the commonjs modules with no problem.
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```js
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(async () => {
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// ...
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})();
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```
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This is what is called an [Immediately Invoked Function Expression](https://flaviocopes.com/javascript-iife/). These are normally used to either create a new execution context, or in this case to allow to run async code easier.
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```js
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const data = await drive("1fvz34wY6phWDJsuIneqvOoZRPfo6CfJyPg1BYgHt59k");
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```
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Using `drive-db`, fetch the data for the given spreadsheet id. In this case it's [this Google Sheet document](https://docs.google.com/spreadsheets/d/1fvz34wY6phWDJsuIneqvOoZRPfo6CfJyPg1BYgHt59k/edit), and since we don't specify the sheet it's the default one.
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```js
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const workbook = xlsx.utils.book_new();
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const worksheet = xlsx.utils.json_to_sheet(data);
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```
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We need to create a workbook with a worksheet inside. The worksheet is created from the previously fetched data. `drive-db` exports the data in the same format that `xlsx`'s `.json_to_sheet()` method expects, so it's a straightforward operation.
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```js
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xlsx.utils.book_append_sheet(workbook, worksheet);
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```
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The worksheet needs to be inside the workbook, so we use the operation `.book_append_sheet()` to make it so.
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```js
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xlsx.writeFile(workbook, "test.xlsx");
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```
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Finally we save the workbook into a XLSX file in out filesystem. With this, now it can be opened by any spreadsheet program that we have installed.
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[](https://github.com/SheetJS/js-xlsx)
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