「JavaScript」typeofでデータ型を調べるサンプル
書式
typeof変数名
使用例
<script>
var cft = null;
/*オブジェクト*/
console.log(typeof cft);
/*数値型*/
console.log(typeof 50);
/*文字列string*/
console.log(typeof "546");
/*boolean型*/
console.log(typeof false);
/*配列*/
var df = ["A001","b002","c003"];
console.log(typeof df);
/*関数*/
function funcA() {
console.log("133333");
}
var gg = funcA;
console.log(typeof gg);
</script>
<script>
var cft = null;
/*オブジェクト*/
console.log(typeof cft);
/*数値型*/
console.log(typeof 50);
/*文字列string*/
console.log(typeof "546");
/*boolean型*/
console.log(typeof false);
/*配列*/
var df = ["A001","b002","c003"];
console.log(typeof df);
/*関数*/
function funcA() {
console.log("133333");
}
var gg = funcA;
console.log(typeof gg);
</script>
<script>
var cft = null;
/*オブジェクト*/
console.log(typeof cft);
/*数値型*/
console.log(typeof 50);
/*文字列string*/
console.log(typeof "546");
/*boolean型*/
console.log(typeof false);
/*配列*/
var df = ["A001","b002","c003"];
console.log(typeof df);
/*関数*/
function funcA() {
console.log("133333");
}
var gg = funcA;
console.log(typeof gg);
</script>
実行結果
object
number
string
boolean
object
function