How to loop through HTML elements without using forEach() loop in JavaScript ?
In this article, we will learn how to loop through HTML elements without using the forEach() method.
This can be done in the following ways:
Table of Content
Approach 1: Using the for loop
The HTML elements can be iterated by using the regular JavaScript for loop. The number of elements to be iterated can be found using the length property. The for loop has three parts, initialization, condition expression, and increment/decrement expression. Each of the items can be accessed by using square brackets with their respective index.
Syntax:
for (let i = 0; i < elements.length; i++) {
console.log(elements[i]);
}
Example: In this example, we will see the use of the for loop.
<!DOCTYPE html>
<html lang="en">
<head>
<title>
How to loop through HTML elements
without using forEach() loop
in JavaScript ?
</title>
</head>
<body>
<!-- HTML elements to iterate -->
<p>This is paragraph 1.</p>
<p>This is paragraph 2.</p>
<p>This is paragraph 3.</p>
<script type="text/javascript">
// Get the elements to be iterated
let htmlElements =
document.getElementsByTagName("p");
// Use a regular for-loop
for (let i = 0; i < htmlElements.length; i++) {
// Print the current element
console.log(htmlElements[i]);
}
</script>
</body>
</html>
Output:
Output on the browser
Approach 2: Using the While loop
The HTML elements can be iterated by using a regular JavaScript while loop. The number of elements can be found using the length property. A temporary value is used to keep track of the current iteration by checking it in the condition expression. Each of the items can then be accessed by using square brackets with their respective index.
Syntax:
let i = 0;
while(i < elements.length) {
console.log(elements[i]);
i++;
}
Example: In this example, we will see the use of Using the While loop.
<!DOCTYPE html>
<html lang="en">
<head>
<title>
How to loop through HTML
elements without using
forEach() loop in JavaScript ?
</title>
</head>
<body>
<!-- HTML elements to iterate -->
<p>This is paragraph 1.</p>
<p>This is paragraph 2.</p>
<p>This is paragraph 3.</p>
<script type="text/javascript">
// Get the elements to be iterated
let htmlElements =
document.getElementsByTagName("p");
// Define a variable to keep track
// of the current iteration
let i = 0;
// Check if the current value
// is lesser than total elements
while (i < htmlElements.length) {
// Print the current element
console.log(htmlElements[i]);
// Increment the value
i++;
}
</script>
</body>
</html>
Output:
Output
Approach 3: Using the ‘for…..of’ statement
The for…of statement can be used to loop over values of an iterable object. It includes objects like an Array, Map, Set, or HTML elements. A temporary variable holds the current value during the execution of the loop, which can then be used in the body of the loop.
Syntax:
for (element of elements) {
console.log(element);
}
Example: In this example, we will see the use of Using the ‘for…..of’ statement.
<!DOCTYPE html>
<html lang="en">
<head>
<title>
How to loop through HTML
elements without using
forEach() loop in JavaScript ?
</title>
</head>
<body>
<!-- HTML elements to iterate -->
<p>This is paragraph 1.</p>
<p>This is paragraph 2.</p>
<p>This is paragraph 3.</p>
<script type="text/javascript">
// Get the elements to be iterated
let HTMLelements =
document.getElementsByTagName("p");
// Use the for...of statement to get
// the values
for (elem of HTMLelements) {
// Print the current element
console.log(elem);
}
</script>
</body>
</html>
Output:
Output
Approach 4: Using the for…in statement
The for…in statement can be used to loop over the enumerable properties of an object or the indices of an array-like object. While this is not the most common use case for for…in, it can be applied to HTMLCollection to iterate over its indices.
Syntax:
for (let index in elements) {
if (elements.hasOwnProperty(index)) {
console.log(elements[index]);
}
}
Example: In this example, we will see the use of the for…in statement.
<!DOCTYPE html>
<html lang="en">
<head>
<title>How to loop through HTML elements without using forEach() loop in JavaScript?</title>
</head>
<body>
<!-- Nikunj Sonigara -->
<!-- HTML elements to iterate -->
<p>This is paragraph 1.</p>
<p>This is paragraph 2.</p>
<p>This is paragraph 3.</p>
<script type="text/javascript">
// Get the elements to be iterated
let htmlElements = document.getElementsByTagName("p");
// Use the for...in statement to get the indices
for (let index in htmlElements) {
if (htmlElements.hasOwnProperty(index)) {
// Print the current element
console.log(htmlElements[index]);
}
}
</script>
</body>
</html>
