isNull

Import from @varavel/vdl-plugin-sdk/utils/predicates.

function isNull(x): x is null;

Checks if the given value is null.

This function tests whether the provided value is strictly equal to null. It returns true if the value is null, and false otherwise.

This function can also serve as a type predicate in TypeScript, narrowing the type of the argument to null.

Parameters

Parameter	Type	Description
x	unknown	The value to test if it is null.

Returns

x is null

True if the value is null, false otherwise.

Example

const value1 = null;
const value2 = undefined;
const value3 = 42;

console.log(isNull(value1)); // true
console.log(isNull(value2)); // false
console.log(isNull(value3)); // false