carbon-components-svelte/docs/src/pages/components/LocalStorage.svx
Eric Liu b6fa25c3e7
Align v10.39 (#738)
* chore(deps-dev): upgrade carbon-components to v10.39.0

* fix(data-table): deprecate Table shouldShowBorder prop

Ref: 0f7324156

* fix(form-group): add legendId

Ref: 4fc56c30b

* feat(number-input): support readonly variant

Ref: d0bd8eddb

* feat(multi-select): export multiSelectRef, fieldRef, selectionRef

* feat(local-storage): add clearItem, clearAll instance methods

* docs(local-storage): simplify clear example

* docs(local-storage): add instructions [ci skip]

* chore(local-storage): reset value on clear [ci skip]

* chore(local-storage): revert value clear [ci skip]
2021-07-09 13:40:25 -07:00

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<script>
import Preview from "../../components/Preview.svelte";
</script>
This utility component wraps the [Window.localStorage API](https://developer.mozilla.org/en-US/docs/Web/API/Window/localStorage) and is useful for persisting ephemeral data (e.g., color theme) at the browser level.
### Reactive example
In the example below, toggle the switch and reload the page. The updated theme should be persisted locally.
<FileSource src="/framed/LocalStorage/LocalStorage" />
### Clear item, clear all
Use the `bind:this` directive to access the `clearItem` and `clearAll` methods.
Invoking `clearItem` will remove the persisted key value from the browser's local storage.
Invoking `clearAll` will remove all key values.
In the following example, toggle the switch and reload the page. Then, click the "Clear storage" button. Refresh the page; the theme should be reset to the untoggled state.
<FileSource src="/framed/LocalStorage/LocalStorageClear" />