function startTime() { const today = new Date(); var S = today.getHours(); var m = today.getMinutes(); m = checkTime(m); document.getElementById('txt').innerHTML = S + ":" + m; setTimeout(startTime, 1000); } function checkTime(i) { if (i < 10) { i = "0" + i }; // add zero in front of numbers < 10 return i; }esta S aquí
var a = S + m if (a === 2215) {console.log("lol"); };var S,m; function startTime() { const today = new Date(); S = today.getHours(); m = today.getMinutes(); m = checkTime(m); document.getElementById('txt').innerHTML = S + ":" + m; setTimeout(startTime, 1000); } function checkTime(i) { if (i < 10) { i = "0" + i }; // add zero in front of numbers < 10 return i; } var a = S + m if (a === 2215) {console.log("lol"); };Olvidó cambiar "S" al alcance global, var tiene un alcance de función, si la variable se declara con var , solo puede acceder a su alcance de función