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Indexed collections in JavaScript
Arrays are the indexed collection in JavaScript as they allow us to access an element using its index.
Following is the code to implement indexed collections in JavaScript −
Example
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>Document</title>
<style>
body {
font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
}
.result {
font-size: 20px;
font-weight: 500;
color: blueviolet;
}
</style>
</head>
<body>
<h1>Indexed collections in JavaScript</h1>
<div class="result"></div>
<br />
<button class="Btn">CLICK HERE</button>
<h3>Click on the above button to create and display the array</h3>
<script>
let resEle = document.querySelector(".result");
let BtnEle = document.querySelector(".Btn");
BtnEle.addEventListener("click", () => {
let arr = [1, 2, 3, 4, 5];
arr.forEach((item, index) => {
resEle.innerHTML += `arr[${index}] = ${item} <br>`;
});
});
</script>
</body>
</html>Output
On clicking the ‘CLICK HERE’ button −
Updated on: 20-Jul-2020
2K+ Views
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