Node queries the path of all files (files or folders) named filename under the target directory

Don't talk much , Direct Gan

const fs = require('fs')
const path = require('path')

/** *  Query target   All files or folders in the directory are named  filename  File path  * @param {String} dir  Look up the catalog  * @param {String} filename  Name of query file  * @returns {Array}  All qualified file paths  */
function getAllDirbyFilename(dir, filename) {
    
  let dirPath = path.resolve(__dirname, dir);
  let files = fs.readdirSync(dirPath); //  All file names under this folder  ( Folder  +  file )
  let resultArr = [];

  files.forEach(file => {
    
    let filePath = dir + '/' + file; //  Current file  |  Path to folder 

    //  Files that meet the query conditions 
    if (file === filename) {
    
      return resultArr.push(filePath);
    }

    //  Continue searching folders 
    if (fs.statSync(filePath).isDirectory()) {
    
      resultArr.push(...getAllDirbyFilename(filePath, filename));
    }

  })

  return resultArr;
}

let fileArr = getAllDirbyFilename('./src', 'main.js');
console.log(fileArr);