Krishna Verma

Access a JavaScript Object

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Access a JavaScript Object

<!DOCTYPE html>
<html>
<body>

<h2>Access a JavaScript object</h2>
<p id="demo"></p>

<script>
const myObj = {name:"John", age:30, city:"New York"};
document.getElementById("demo").innerHTML = myObj.name;
</script>

</body>
</html>

Accessing a Function Without Returns

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Accessing a Function Without Returns

<!DOCTYPE html>
<html>
<body>

<h1>JavaScript Functions</h1>

<p>Accessing a function without () returns the function and not the function result:</p>
<p id="demo"></p>

<script>
function toCelsius(f) {
  return (5/9) * (f-32);
}

let value = toCelsius;
document.getElementById("demo").innerHTML = value;
</script>

</body>
</html>

Accessing The First Element of Array

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Accessing The First Element of Array

<!DOCTYPE html>
<html>
<body>
<h1>JavaScript Arrays</h1>
<h2>Bracket Indexing</h2>

<p>JavaScript array elements are accesses using numeric indexes (starting from 0).</p>

<p id="demo"></p>

<script>
const fruits = ["Banana", "Orange", "Apple", "Mango"];
document.getElementById("demo").innerHTML = fruits[0];
</script>

</body>
</html>

Add a Border to Element

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Add a Border to Element

<!DOCTYPE html>
<html>
<body>

<div id="myDiv">This is a div element.</div>
<br>
<button type="button" onclick="myFunction()">Set border</button>

<script>
function myFunction() {
  document.getElementById("myDiv").style.border = "thick solid #0000FF";
}
</script>

</body>
</html>

Add Class to Element

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Add Class to Element

<!DOCTYPE html>
<html>
<style>
.myStyle {
  background-color: coral;
  padding: 16px;
}
</style>

<body>
<h1>The DOMToken Object</h1>
<h2>The add() Method</h2>

<button onclick="myFunction()">Add</button>
<p>Click "Add" to add the "myStyle" class to myDIV.</p>

<div id="myDIV">
<p>I am a myDIV.</p>
</div>

<script>
function myFunction() {
  const list = document.getElementById("myDIV").classList;
  list.add("myStyle");
}
</script>

</body>
</html>

Add Two Click Events to Same Button

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Add Two Click Events to Same Button

<!DOCTYPE html>
<html>
<body>

<h2>JavaScript addEventListener()</h2>

<p>This example uses the addEventListener() method to add two click events to the same button.</p>

<button id="myBtn">Try it</button>

<script>
var x = document.getElementById("myBtn");
x.addEventListener("click", myFunction);
x.addEventListener("click", someOtherFunction);

function myFunction() {
  alert ("Hello World!");
}

function someOtherFunction() {
  alert ("This function was also executed!");
}
</script>

</body>
</html>