[ 자바스크립트 ] isFinite() VS Number.isFinite()

 
<script type="text/javascript">

// Number.isFinite() 함수가 적용되지 않을 때 추가할 내용 ( ie 11 이하 ) 
if ( ! Number.isFinite ){ 
        Number.isFinite = function isFinite ( value ) {  return typeof value === "number" && isFinite( value );  };
} 
</script>

---

<p id="type"> </p>
<p id="global"> </p>

<p id="number"> </p>

<script type="text/javascript">

function testing (){ 

        var value = 100; 

        var type = typeof value; 
        var global = isFinite( value ); 

        var number = Number.isFinite( value ); 

        document.getElementById( "type" ).innerHTML = type; 
        document.getElementById( "global" ).innerHTML = global; 
        document.getElementById( "number" ).innerHTML = number; 
} 
</script>

---

<p id="type"> </p>
<p id="global"> </p>

<p id="number"> </p>

<script type="text/javascript">

function testing (){ 

        var value = "100"; 

        var type = typeof value; 
        var global = isFinite( value ); 

        var number = Number.isFinite( value ); 

        document.getElementById( "type" ).innerHTML = type; 
        document.getElementById( "global" ).innerHTML = global; 
        document.getElementById( "number" ).innerHTML = number; 
} 
</script>

---

<p id="type"> </p>
<p id="global"> </p>

<p id="number"> </p>

<script type="text/javascript">

function testing (){ 

        var value = undefined; 

        var type = typeof value; 
        var global = isFinite( value ); 

        var number = Number.isFinite( value ); 

        document.getElementById( "type" ).innerHTML = type; 
        document.getElementById( "global" ).innerHTML = global; 
        document.getElementById( "number" ).innerHTML = number; 
} 
</script>

---

<p id="type"> </p>
<p id="global"> </p>

<p id="number"> </p>

<script type="text/javascript">

function testing (){ 

        var value = null; 

        var type = typeof value; 
        var global = isFinite( value ); 

        var number = Number.isFinite( value ); 

        document.getElementById( "type" ).innerHTML = type; 
        document.getElementById( "global" ).innerHTML = global; 
        document.getElementById( "number" ).innerHTML = number; 
} 
</script>

---

<p id="type"> </p>
<p id="global"> </p>

<p id="number"> </p>

<script type="text/javascript">

function testing (){ 

        var value = ""; 

        var type = typeof value; 
        var global = isFinite( value ); 

        var number = Number.isFinite( value ); 

        document.getElementById( "type" ).innerHTML = type; 
        document.getElementById( "global" ).innerHTML = global; 
        document.getElementById( "number" ).innerHTML = number; 
} 
</script>

---

<p id="type"> </p>
<p id="global"> </p>

<p id="number"> </p>

<script type="text/javascript">

function testing (){ 

        var value = " "; 

        var type = typeof value; 
        var global = isFinite( value ); 

        var number = Number.isFinite( value ); 

        document.getElementById( "type" ).innerHTML = type; 
        document.getElementById( "global" ).innerHTML = global; 
        document.getElementById( "number" ).innerHTML = number; 
} 
</script>

---

<p id="type"> </p>
<p id="global"> </p>

<p id="number"> </p>

<script type="text/javascript">

function testing (){ 

        var value = { }; 

        var type = typeof value; 
        var global = isFinite( value ); 

        var number = Number.isFinite( value ); 

        document.getElementById( "type" ).innerHTML = type; 
        document.getElementById( "global" ).innerHTML = global; 
        document.getElementById( "number" ).innerHTML = number; 
} 
</script>

---

<p id="type"> </p>
<p id="global"> </p>

<p id="number"> </p>

<script type="text/javascript">

function testing (){ 

        var value = [ ]; 

        var type = typeof value; 
        var global = isFinite( value ); 

        var number = Number.isFinite( value ); 

        document.getElementById( "type" ).innerHTML = type; 
        document.getElementById( "global" ).innerHTML = global; 
        document.getElementById( "number" ).innerHTML = number; 
} 
</script>
 

이 내용이 도움이 되셨다면, 아래의 하트 버튼을 눌러주세요. *^^*