@silen/is-null

Check if the parameter is null

Usage no npm install needed!

<script type="module">
  import silenIsNull from 'https://cdn.skypack.dev/@silen/is-null';
</script>

README

is-null

Determine if a value is Null

install

npm i @silen/is-null

api

  • declare function isNull(val: any): boolean;

usage

const { isNull } = require('@silen/is-null');
// or
import { isNull } from '@silen/is-null';

console.log(isNull(new Buffer(4)));
console.log(isNull(Buffer.alloc(4)));
console.log(isNull(undefined));
console.log(isNull(null));
console.log(isNull(''));
console.log(isNull(true));
console.log(isNull(0));
console.log(isNull(1));
console.log(isNull(1.0));
console.log(isNull('string'));
console.log(isNull({}));
console.log(isNull(function foo() {}));
console.log(isNull(Symbol()));
console.log(isNull(new Set));
console.log(isNull(new Map));
console.log(isNull(new WeakMap));
console.log(isNull(new WeakSet));

// or
console.log(window.Type.isNull(new WeakSet));

This is a demo for testing the usage of isNull from @silen/is-null module. You can try the others and do likewise.

others