isJSONValue
Checks if a given value is a valid JSON value.
A valid JSON value can be:
- a JSON object (an object with string keys and valid JSON values)
- a JSON array (an array of valid JSON values)
- a
string - a
number - a
boolean null
Signature
typescript
function isJSONValue(value: unknown): value is Record<string, any> | any[] | string | number | boolean | null;Parameters
value(unknown): The value to check.
Returns
(value is Record<string, any> | any[] | string | number | boolean | null): True if the value is a valid JSON value, otherwise false.
Examples
typescript
console.log(isJSONValue(null)); // true
console.log(isJSONValue({ key: 'value' })); // true
console.log(isJSONValue([1, 2, 3])); // true
console.log(isJSONValue('Hello')); // true
console.log(isJSONValue(42)); // true
console.log(isJSONValue(true)); // true
console.log(isJSONValue(undefined)); // false
console.log(isJSONValue(() => {})); // false