contains.md

title	tags	author_title	author_url	author_image_url	description	image
contains	function intermediate	Deepak Vishwakarma	https://github.com/deepakshrma	https://avatars2.githubusercontent.com/u/7682731?s=400	Implementation of "contains" in typescript, javascript and deno.	https://www.positronx.io/wp-content/uploads/2018/11/positronx-banner-1152-1.jpg

Returns true if given string s1 contains s2. Compare is case insensitive.

const contains = (s1: string, s2: string = "") =>
  s1.toLowerCase().indexOf(s2.toLowerCase()) !== -1;

contains("Text1", "Ext"); // true
contains("Text1", "et"); // false