Function hasProperties

Source: HasProperties.ts

Checks whether all of the specified properties exist (are present) on an object using the in operator, which looks up both own properties and the prototype chain.

Import

import { hasProperties } from '@litert/utils-object';

Signature

function hasProperties<T extends IObject>(obj: T, properties: Array<keyof T>): boolean;

Parameters

• Parameter obj: T

  The object to check.

• Parameter properties: Array<keyof T>

  The list of property keys to check for. All keys must be present for the function to return true. An empty array returns false.

Return Value

true if all specified properties exist on obj, false otherwise (including when properties is empty).

Examples

import { hasProperties } from '@litert/utils-object';

const user = { name: 'Alice', age: 30 };

console.log(hasProperties(user, ['name', 'age']));        // true
console.log(hasProperties(user, ['name', 'email']));      // false
console.log(hasProperties(user, []));                     // false (empty list)