JavaScriptPractice/es6.html at main · EduKeyPath/JavaScriptPractice · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>demo</title>
</head>
<body>

<p id="demo"></p>
<p id="demo1"></p>
<script>
    var x = 55;
    var y = 55.5;
    var xx = Number.isInteger(x);
    var yy = Number.isInteger(y);
    document.querySelector('#demo').innerHTML = xx;
    document.querySelector('#demo1').innerHTML = yy;
</script>

<p id="demo2"></p>
<p id="demo3"></p>
<script>
    var a = "55";
    var b = "John";
    var aa = isNaN(a);
    var bb = isNaN(b);
    document.querySelector('#demo2').innerHTML = aa;
    document.querySelector('#demo3').innerHTML = bb;
</script>

<p id="demo4"></p>
<p id="demo5"></p>
<script>
    var c = 100/10;
    var d = 10/0;
    var cc = isFinite(c);
    var dd = isFinite(d);
    document.querySelector('#demo4').innerHTML = cc;
    document.querySelector('#demo5').innerHTML = dd;
</script>

<p id="demo6"></p>
<p id="demo7"></p>
<script>
    var x = function(firstname, lastname){
        return firstname + ' ' + lastname;
    }
    document.getElementById('demo6').innerHTML = x('John', 'Shaw');

    const ba = (first, last) => first + last;
    document.getElementById('demo7').innerHTML = ba('Bably', 'Shaw');
</script>


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</body>
</html>