forked from sheetjs/docs.sheetjs.com
32 lines
828 B
Markdown
32 lines
828 B
Markdown
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---
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title: IndexedDB API
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pagination_prev: demos/grid
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pagination_next: demos/worker
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sidebar_custom_props:
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type: web
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---
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:::warning
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IndexedDB is a very low-level API. It is strongly recommended to use a wrapper
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library or [WebSQL](/docs/demos/data/websql) in production applications.
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:::
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`localForage` is a IndexedDB wrapper that presents an async Storage interface.
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Arrays of objects can be stored using `JSON.stringify` using row index as key:
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```js
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const aoo = XLSX.utils.sheet_to_json(ws);
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for(var i = 0; i < aoo.length; ++i) await localForage.setItem(i, JSON.stringify(aoo[i]));
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```
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Recovering the array of objects is possible by using `JSON.parse`:
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```js
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const aoo = [];
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for(var i = 0; i < localForage.length; ++i) aoo.push(JSON.parse(await localForage.getItem(i)));
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const wb = XLSX.utils.json_to_sheet(aoo);
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```
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