Finally Statement (JS Errors)

<!DOCTYPE html>
<html>
<head>
<title>JavaScript Cdoe Testing</title>
</head>
<body>
<input id = "demo" type = "text">
<button type = "button" onclick = "jsFun()">Check Input</button>
<p id = "page"></p>
<script>
function jsFun(){
var sms, x;
sms = document.getElementById("page");
sms.innerHTML;
x = document.getElementById("demo").value;
try {
if (x == "") throw "empty.";
if (isNaN(x)) throw "not a number.";
x = Number(x);
if(x < 5) throw "too small.";
if(x > 10) throw "too big.";
if(x > 4 && x < 11) throw "OK.";
}

catch (err){
sms.innerHTML = "The Input is " + err;
}

finally{
document.getElementById("demo").value;
}
}
</script>
</body>
</html>

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ZilaStar ICT Jun 15 2022, 09:33:58

JS Arrow Function

<!DOCTYPE html>
<html>
<head>
<title>JavaScript Code Testing</title>
</head>
<body>
<button  id = "btn1">Try Now</button>
<p id = "demo1"></p>

<button id = "btn2">Try Now</button>
<p id = "demo2"></p>

<script>
var test1 = function(){
document.getElementById("demo1").innerHTML += this;
}

//window object calls the function
window.addEventListener("load", test1);

//button object calls the function
document.getElementById("btn1").addEventListener("click", test1);

var test2 = () =>{
document.getElementById("demo2").innerHTML += this;
}

//window object calls the function
window.addEventListener("load", test2);

//button object calls the function
document.getElementById("btn2").addEventListener("click", test2);

</script>
</body>
</html>

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ZilaStar ICT Jun 14 2022, 08:04:31

Inheritance (JS Classes)

<!DOCTYPE html>
<html>
<head>
<title>JavaScript Code Testing</title>
</head>
<body>
<p id = "demo">Inheritance Test</p>
<script>
class Car{
constructor(brand){
this.carname = brand;
}
present(){
return "I have " + this.carname;
}
}

class Model extends Car{
constructor(brand, mod){
super(brand);
this.model = mod;
}
show(){
return this.present() + " and the model is " + this.model + ".";
}
}
var myCar = new Model("Tesla", "2021");
document.getElementById("demo").innerHTML = myCar.show();
</script>
</body>
</html>

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ZilaStar ICT Jun 13 2022, 08:03:15

Getter and Setter (JS Classes)

<!DOCTYPE html>
<html>
<head>
<title>JavaScript Code Testing</title>
</head>
<body>
<p id = "demo"></p>
<script>
class Car{
constructor(brand){
this.carname = brand;
}
get cnam(){
return this.carname;
}
set cnam(x){
this.carname = x;
}
}
const myCar = new Car["Tesla"];
document.getElementById("demo").innerHTML = myCar;
</script>
</body>
</html>

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ZilaStar ICT Jun 12 2022, 08:02:28

Creating Object (JS Classes)

<!DOCTYPE html>
<html>
<head>
<title>JavaScript Code Testing</title>
</head>
<body>
<p id ="demo"></p>
<script>
class Name{
constructor(Name, City){
this.name = Name;
this.city = City;
}
}

var newName = new Name("Thet", "Yangon");
document.getElementById("demo").innerHTML = newName.name + " stays in " + newName.city + ".";

</script>
</body>
</html>

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ZilaStar ICT Jun 11 2022, 08:01:10

Class Methods (JS Classes)

<!DOCTYPE html>
<html>
<head>
<title>JavaScript Code Testing</title>
</head>
<body>
<p id = "demo">What is your name and age?</p>
<button type = "button" onclick = "jsFun()">Check Name and Age</button>
<script>
function jsFun(){
class Name{
constructor(Name, Year){
this.name = Name;
this.year = Year;
}

age(){
const date = new Date();
return date.getFullYear() - this.year;
}
}

const myName = new Name("Thet", 1987);
document.getElementById("demo").innerHTML = "My name is " + myName.name + " and my age is " + myName.age() + " years old now."; 
}
</script>
</body>
</html>

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ZilaStar ICT Jun 08 2022, 10:22:01

Reduce() (JS Array Iteration)

<!DOCTYPE html>
<html>
<head>
<title>JavaScript Code Testing</title>
</head>
<body>
<p id = "demo"></p>

<button type = "button" onclick = "jsReduce()">Total</button>&nbsp;&nbsp;
<button type = "button" onclick = "jsReset()">Reset</button>

<script>
var numbers = [302, 428, 49, 92, 84, 70, 80, 10, 3, 200];
var num = numbers.sort(function(a, b){return a - b;}).join("<br/>");
document.getElementById("demo").innerHTML = num;

function jsReset(){
document.getElementById("demo").innerHTML = num;
}

function jsReduce(){
var number2 = numbers.reduce(funReduce);
document.getElementById("demo").innerHTML = number2;
}

function funReduce(total, value){
return total + value;
}


</script>
</body>
</html>

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ZilaStar ICT Jun 07 2022, 10:21:20

Map() (JS Array Iteration)

<!DOCTYPE html>
<html>
<head>
<title>JavaScript Code Testing</title>
</head>
<body>
<p id = "demo"></p>
<button type = "button" onclick = "jsDouble()">Double</button>&nbsp;&nbsp;
<button type = "button" onclick = "jsReset()">Reset</button>&nbsp;&nbsp;
<button type = "button" onclick = "jsTriple()">Triple</button>
<script>
var numbers = [302, 428, 49, 92, 84, 70, 80, 10, 3, 200];
var num = numbers.sort(function(a, b){return a - b;}).join("<br/>");
document.getElementById("demo").innerHTML = num;


function jsReset(){
document.getElementById("demo").innerHTML = num;
}

function jsDouble(){
number2 = numbers.map(mapDouble).join("<br/>");
document.getElementById("demo").innerHTML = number2;
}

function jsTriple(vlaue){
number3 = numbers.map(mapTriple).join("<br/>");
document.getElementById("demo").innerHTML = number3;
}

function mapDouble(value){
return value*2;
}

function mapTriple(value){
return value*3;
}
</script>
</body>
</html>

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ZilaStar ICT Jun 05 2022, 10:20:42

Foreach() (JS Array Iteration)

<!DOCTYPE html>
<html>
<head>
<title>JavaScript Code Testing</title>
</head>
<body>
<p id = "demo"></p>
<script>
var txt = "";
var numbers = [302, 428, 49, 92, 84, 70, 80, 10, 3, 200];
var num = numbers.sort(function (a, b){return a - b;});

txt = "<ol>";
num.forEach(jsFunction);

document.getElementById("demo").innerHTML = txt;

function jsFunction(value){
txt += "<li>" + value + "</li><br/><hr/><br/>";
}

txt += "</ol>";

</script>
</body>
</html>

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ZilaStar ICT Jun 02 2022, 10:19:38

Find() (JS Array Iteration)

<!DOCTYPE html>
<html>
<head>
<title>JavaScript Code Testing</title>
</head>
<body>
<p id = "demo">Find the first number greater than 20</p>

<button type = "button" onclick = "jsFind()">Find > 20</button>&nbsp;&nbsp;
<button type = "button" onclick = "jsReset()">Reset</button>

<script>
var numbers = [302, 428, 49, 92, 84, 70, 80, 10, 3, 200];
var num = numbers.sort(function(a, b){return a - b;}).join("<br/>");
document.getElementById("demo").innerHTML = num;

function jsReset(){
document.getElementById("demo").innerHTML = num;
}

function jsFind(){
var number2 = numbers.find(funFind);
document.getElementById("demo").innerHTML = number2;
}

function funFind(value){
return value > 20;
}


</script>
</body>
</html>

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ZilaStar ICT May 21 2022, 10:18:54

Filter() (JS Array Iteration)

<!DOCTYPE html>
<html>
<head>
<title>JavaScript Code Testing</title>
</head>
<body>
<p id = "demo"></p>
<button type = "button" onclick = "jsFilter()">Less Than 100</button>&nbsp;&nbsp;
<button type = "button" onclick = "jsReset()">Reset</button>

<script>
var numbers = [302, 428, 49, 92, 84, 70, 80, 10, 3, 200];
var num = numbers.sort(function(a, b){return a - b;}).join("<br/>");
document.getElementById("demo").innerHTML = num;

function jsReset(){
document.getElementById("demo").innerHTML = num;
}

function jsFilter(){
number2 = numbers.filter(funFilter).sort(function(a, b){return a - b;}).join("<br/>");
document.getElementById("demo").innerHTML = number2;
}

function funFilter(value){
return value < 100;
}

</script>
</body>
</html>

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ZilaStar ICT May 08 2022, 06:41:53

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