Introduction

In this tutorial, we'll dive into how you can manage focus on web pages using JavaScript. We'll be talking about how you can enhance the user's experience by directing their attention to certain parts of your webpage using JavaScript's built-in focus management functions.

By the end of this tutorial, you'll learn:

• The concept of focus in JavaScript
• How to set focus on HTML elements
• How to shift focus between elements

This tutorial assumes that you have a basic understanding of HTML, CSS, and JavaScript.

Step-by-Step Guide

Understanding Focus

In web development, focus refers to which control on the screen (an input item such as a button, form input, link, etc.) is currently receiving input from the keyboard and similar devices.

Setting Focus

We can set focus on an HTML element using the focus() method. For example, to set focus on an input field, we can select it using document.getElementById() and then call focus() on it.

Shifting Focus

Shifting focus between elements is achieved by calling the focus() method on another element.

Code Examples

Setting Focus

// get the element
var inputField = document.getElementById('myInput');

// set focus
inputField.focus();

In the above example, we first get the HTML element with id myInput. Then we call focus() on it which will cause the browser to move the cursor to this input field.

Shifting Focus

// get the elements
var inputField1 = document.getElementById('myInput1');
var inputField2 = document.getElementById('myInput2');

// set focus on first input field
inputField1.focus();

// shift focus to second input field after 3 seconds
setTimeout(function() {
  inputField2.focus();
}, 3000);

Here, we first set the focus on inputField1. Then, after a delay of 3 seconds, we shift the focus to inputField2.

Summary

We've learned about the concept of focus in web development, and how to set and shift focus between HTML elements using JavaScript.

For further learning, you can explore:

• How to handle focus events
• How to create accessible web content by managing focus

Practice Exercises

1. Write a JavaScript function that sets focus on an input field when the page loads.
2. Write a JavaScript function that shifts focus between two input fields when a button is clicked.

Solutions

window.onload = function() {
  document.getElementById('myInput').focus();
};

This will set the focus on the input field with id 'myInput' when the page loads.

document.getElementById('myButton').onclick = function() {
  document.getElementById('myInput2').focus();
};

This will shift the focus to the input field with id 'myInput2' when the button with id 'myButton' is clicked.

Continue practicing with more complex scenarios for better understanding. Happy coding!