--- title: PouchDB pagination_prev: demos/desktop/index pagination_next: demos/local/index sidebar_custom_props: type: nosql --- import current from '/version.js'; import CodeBlock from '@theme/CodeBlock'; PouchDB is a pure JS database with built-in synchronization features. ## Integration Details `Database#allDocs` is the standard approach for bulk data export. The generated row objects have additional `_id` and `_rev` keys that should be removed. Nested objects must be flattened. The ["Export Tutorial"](/docs/getting-started/examples/export) includes an example of constructing a simple array. ```js function export_pouchdb_to_xlsx(db) { /* fetch all rows, including the underlying data */ db.allDocs({include_docs: true}, function(err, doc) { /* pull the individual data rows */ const aoo = doc.rows.map(r => { /* `rest` will include every field from `r` except for _id and _rev */ const { _id, _rev, ...rest } = r; return rest; }); /* generate worksheet */ const ws = XLSX.utils.json_to_sheet(aoo); /* generate workbook and export */ const wb = XLSX.utils.book_new(); XLSX.utils.book_append_sheet(wb, ws, "Sheet1"); XLSX.writeFile(wb, "SheetJSPouch.xlsx"); }); } ``` ## Complete Example 0) Download the "Working Version" from the Getting Started guide. The ZIP file should have `MD5` checksum `ac4da7cb0cade1be293ba222462f109c`: ```bash curl -LO https://github.com/nickcolley/getting-started-todo/archive/master.zip md5sum master.zip || md5 master.zip ### the checksum will be printed ``` If the download is unavailable, a mirror is available at 1) Unzip the `master.zip` file and enter the folder: ```bash unzip master.zip cd getting-started-todo-master ``` 2) Edit `index.html` to reference the SheetJS library and add a button: {`\

`} 3) Just before the end of `app.js`, add a `click` event listener: ```js title="app.js" if (remoteCouch) { sync(); } // highlight-start document.getElementById("xport").addEventListener("click", function() { db.allDocs({include_docs: true}, function(err, doc) { const aoo = doc.rows.map(r => { const { _id, _rev, ... rest } = r.doc; return rest; }); const ws = XLSX.utils.json_to_sheet(aoo); const wb = XLSX.utils.book_new(); XLSX.utils.book_append_sheet(wb, ws, "Sheet1"); XLSX.writeFile(wb, "SheetJSPouch.xlsx"); }); }); // highlight-end })(); ``` 4) Start a local web server: ```bash npx http-server . ``` Access `http://localhost:8080` from your browser. Add a few items and click the "Export!" button to generate a new file.