ToolJet/docs/versioned_docs/version-2.34.0/widgets/qr-scanner.md

---
id: qr-scanner
title: QR Scanner
---
# QR Scanner
Scan QR codes using device camera and hold the data they carry.

:::note Known Issue
You might have to stick to the Safari browser in IOS as camera access is restricted for third-party browsers.
:::

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## Events

| <div style={{ width:"100px"}}> Event </div> | <div style={{ width:"100px"}}> Description </div> |
|:------------------|:---------------------|
| onDetect | This event is fired whenever the widget successfully scans a QR code. |

:::info
Check [Action Reference](/docs/category/actions-reference) docs to get the detailed information about all the **Actions**.
:::

:::caution Debugging tip

Browser camera APIs restrict this widget to only work in either `localhost` or `https`.

So if you're testing it out, be sure to either use `localhost` or `https`.
:::

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## Component Specific Actions (CSA)

There are currently no CSA (Component-Specific Actions) implemented to regulate or control the component.

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## Exposed Variables

| <div style={{ width:"100px"}}> Variables </div> | <div style={{ width:"200px"}}> Description </div> | <div style={{ width:"135px"}}> How To Access </div>|
|:----------- |:----------- |:--------- |
| lastDetectedValue | This variable holds the data contained in the last QR code scanned by the widget. | To fetch the data use `{{components.qrscanner1.lastDetectedValue}}` |

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## General
### Tooltip

A Tooltip is often used to specify extra information about something when the user hovers the 
mouse pointer over the widget.

Under the <b>General</b> accordion, you can set the value in the string format. 
Now hovering over the widget will display the string as the tooltip.

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## Layout

| <div style={{ width:"100px"}}> Layout </div> | <div style={{ width:"100px"}}> Description </div> | <div style={{ width:"135px"}}> Expected Value </div> |
|:--------------- |:----------------------------------------- | :------------------------------------------------------------------------------------------------------------- |
| Show on desktop | Toggle on or off to display desktop view. | You can programmatically determining the value by clicking on `Fx` to set the value `{{true}}` or `{{false}}` |
| Show on mobile  | Toggle on or off to display mobile view.  | You can programmatically determining the value by clicking on `Fx` to set the value `{{true}}` or `{{false}}` |

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## Styles

| <div style={{ width:"100px"}}> Style </div> | <div style={{ width:"100px"}}>  Description </div> | <div style={{ width:"100px"}}> Default Value </div> |
|:------------ |:-------------|:--------- |
| Visibility | Toggle on or off to control the visibility of the widget. You can programmatically change its value by clicking on the `Fx` button next to it. If `{{false}}` the widget will not be visible after the app is deployed. | By default, it's set to `{{true}}` |
| Disable | This is `off` by default, toggle `on` the switch to lock the widget and make it non-functional. You can also programmatically set the value by clicking on the `Fx` button next to it. If set to `{{true}}`, the widget will be locked and becomes non-functional. | By default, its value is set to `{{false}}` |

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