小小面試題

小小面試題

---

a的值

var a ;
if(a){
	console.log('aa')
	let a = 20
} else {
	console.log('bb')
	let a = 30
}
console.log(a)

---

刪除span 標籤

	<div id="box">
	box
	<span>span</span>
	</div>

	<script>
				
	var box  = document.querySelector('#box');
	var span = document.querySelector('span');
	</script>