Wdym?

Do you wish to search for text in a text file?
Then

//Why do I always use readFileSync? Idk lol
const fs = require('fs');
//Get file
let file = fs.readFileSync('things.txt','utf8');
//By line:
file = file.split('\n');
let word = file[file.indexOf('something')]

If you want to search for text in Repl, use Ctrl/Command + F (Find)

Solution

use readdir for searching file in node.js. HEre's a link that teaches you how to do it.

https://nodejs.org/en/knowledge/file-system/how-to-search-files-and-directories-in-nodejs/

IT should work

Ctrl+F (Cmd+F on a Mac) will let you search in the IDE.