<script>
function day_cnt(year, month){
var cnt = 32 – new Date(year, month-1, 32).getDate();
console.log(“day count:”+cnt);
}
</script>
<button type=”button” onclick=”day_cnt(‘2020′,’2’);” >TEST BTN</button>
<script>
function day_cnt(year, month){
var cnt = 32 – new Date(year, month-1, 32).getDate();
console.log(“day count:”+cnt);
}
</script>
<button type=”button” onclick=”day_cnt(‘2020′,’2’);” >TEST BTN</button>