TS Default Value Fix
TODO: collapasable, copyable, download, etc
In my React component in TypeSCript, how can I provide a deafult value?
44 <DAISignInButton session={session} />```In my React component in TypeSCript, how can I provide a deafult value?
My code ```
export default function DAISignInButton({
session,
logoutButton = false,
}: {
session: Session | null | undefined;
logoutButton: boolean;
}): React.ReactElement {
The TS error:
44 <DAISignInButton session={session} />```The error `TS2741` indicates that the `logoutButton` property is required but is missing in the props provided to the `DAISignInButton` component. To fix this, you can provide a default value for the `logoutButton` property using default props in your React component.
Here’s how you can do it:
1. **UsingThe issue arises because TypeScript expects the `logoutButton` property to be provided when using the `DAISignInButton` component, even though you've given it a default value in the destructuring assignment. However, TypeScript does not infer the default values when checking for missing properties.
To resolve this, you can make the `logoutButton` property optional in the component's prop types. Here's how you can do it:
```typescript
type DAISignInButtonProps = {
session: Session | null | undefined;
logoutButton?: boolean;
};
export default function DAISignInButton({
session,
logoutButton = false,
}: DAISignInButtonProps): React.ReactElement {
// component implementation
}
This way, logoutButton
is optional, and if it's not provided, it will default to false
.
Your component usage will not throw an error anymore:
<DAISignInButton session={session} />
The complete component code with the fix:
type DAISignInButtonProps = {
session: Session | null | undefined;
logoutButton?: boolean;
};
export default function DAISignInButton({
session,
logoutButton = false,
}: DAISignInButtonProps): React.ReactElement {
// component implementation
}
Now, TypeScript recognizes that logoutButton
is optional and will use the default value if it is not provided.
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