Function isInstanceOf

isInstanceOf<T extends AnyClass>(value: unknown, class_: T): value is T
Checks if a value is an instance of a class or a class name. Useful when you want to check if a value is an instance of a class that may not be defined in the current scope. For example, if you want to check if a value is an OffscreenCanvas instance, you might not want to do the song and dance of using typeof OffscreenCanvas !== 'undefined' and then shimming OffscreenCanvas if the types aren't around.
Type Parameters
- T extends AnyClass
Parameters
- value: unknown
  The value to recursively check
- class_: T
  A string or class that the value should be an instance of
Returns value is T
Example
```
if (isInstanceOf(value, 'OffscreenCanvas')) {
    // value is an OffscreenCanvas
  }
```
- Defined in isInstanceOf.ts:23
isInstanceOf<K extends GlobalClassName>(
value: unknown,
className: K,
): value is typeof globalThis[K]
Checks if a value is an instance of a class or a class name. Useful when you want to check if a value is an instance of a class that may not be defined in the current scope. For example, if you want to check if a value is an OffscreenCanvas instance, you might not want to do the song and dance of using typeof OffscreenCanvas !== 'undefined' and then shimming OffscreenCanvas if the types aren't around.
Type Parameters
- K extends GlobalClassName
Parameters
- value: unknown
  The value to recursively check
- className: K
Returns value is typeof globalThis[K]
Example
```
if (isInstanceOf(value, 'OffscreenCanvas')) {
    // value is an OffscreenCanvas
  }
```
- Defined in isInstanceOf.ts:24
isInstanceOf(value: unknown, className: string): value is object
Checks if a value is an instance of a class or a class name. Useful when you want to check if a value is an instance of a class that may not be defined in the current scope. For example, if you want to check if a value is an OffscreenCanvas instance, you might not want to do the song and dance of using typeof OffscreenCanvas !== 'undefined' and then shimming OffscreenCanvas if the types aren't around.
Parameters
- value: unknown
  The value to recursively check
- className: string
Returns value is object
Example
```
if (isInstanceOf(value, 'OffscreenCanvas')) {
    // value is an OffscreenCanvas
  }
```
- Defined in isInstanceOf.ts:28

Function isInstanceOf

Type Parameters

Parameters

Returns value is T

Example

Type Parameters

Parameters

Returns value is typeof globalThis[K]

Example

Parameters

Returns value is object

Example

Settings