JSFiddle - React, Tailwind, and code Playground

JavaScript

var episodePatternGI = /s(\d{1,2})e(\d{1,2})/gi;
var str = 'S3E1 hehehe bla s09e12';
var episodes = [];

var m;
while ((m = episodePatternGI.exec(str)) !== null) {
    episodes.push({
  		s: m[1],
   		e: m[2]
	  });
}

console.log(episodes);