JavaScript allows us to dynamically change greetings based on the current hour of the day, providing a personalized touch to web applications. In this article, we’ll walk through a step-by-step guide on creating a simple JavaScript function that changes greetings according to morning, afternoon, and evening.
Step 1: Set Up HTML Structure
Begin by creating a basic HTML structure with a placeholder for the greeting text:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Dynamic Greetings</title>
</head>
<body>
<div id="greeting-container">
<p id="greeting-text">Good Morning!</p>
</div>
<script src="script.js"></script>
</body>
</html>
Step 2: Write JavaScript Logic
Now, create a JavaScript file (script.js) and add the logic to change greetings based on the current hour:
document.addEventListener('DOMContentLoaded', function () {
const greetingText = document.getElementById('greeting-text');
function getCurrentGreeting() {
const currentHour = new Date().getHours();
if (currentHour >= 5 && currentHour < 12) {
return 'Good Morning!';
} else if (currentHour >= 12 && currentHour < 18) {
return 'Good Afternoon!';
} else {
return 'Good Evening!';
}
}
function updateGreeting() {
const greeting = getCurrentGreeting();
greetingText.textContent = greeting;
}
// Update greeting initially
updateGreeting();
// Update greeting every minute
setInterval(updateGreeting, 60000);
});
This JavaScript code defines a function getCurrentGreeting() that determines the current time and returns the appropriate greeting. The updateGreeting() function then updates the displayed greeting text on the webpage.
The setInterval method ensures that the greeting is updated every minute to reflect real-time changes.
Step 3: Style Your Greeting
Style your greeting to make it visually appealing. You can add some CSS to center the text and make it visually attractive:
body {
display: flex;
align-items: center;
justify-content: center;
height: 100vh;
margin: 0;
background-color: #f0f0f0;
}
#greeting-container {
text-align: center;
}
#greeting-text {
font-size: 24px;
font-weight: bold;
color: #333;
}
Step 4: Test Your Application
Open your HTML file in a web browser and observe the greeting text change dynamically based on the current hour. The application will greet the user with “Good Morning” in the morning, “Good Afternoon” in the afternoon, and “Good Evening” in the evening.
Certainly! Here’s the complete HTML file that integrates the HTML structure, JavaScript logic, and CSS styling:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Dynamic Greetings</title>
<style>
body {
display: flex;
align-items: center;
justify-content: center;
height: 100vh;
margin: 0;
background-color: #f0f0f0;
}
#greeting-container {
text-align: center;
}
#greeting-text {
font-size: 24px;
font-weight: bold;
color: #333;
}
</style>
</head>
<body>
<div id="greeting-container">
<p id="greeting-text">Good Morning!</p>
</div>
<script>
document.addEventListener('DOMContentLoaded', function () {
const greetingText = document.getElementById('greeting-text');
function getCurrentGreeting() {
const currentHour = new Date().getHours();
if (currentHour >= 5 && currentHour < 12) {
return 'Good Morning!';
} else if (currentHour >= 12 && currentHour < 18) {
return 'Good Afternoon!';
} else {
return 'Good Evening!';
}
}
function updateGreeting() {
const greeting = getCurrentGreeting();
greetingText.textContent = greeting;
}
// Update greeting initially
updateGreeting();
// Update greeting every minute
setInterval(updateGreeting, 60000);
});
</script>
</body>
</html>
Conclusion
Creating a JavaScript current hour change for greetings adds a personal and dynamic touch to your web applications. This simple script enhances user experience by adapting the displayed content to the time of day. Feel free to customize the greetings and styling to suit your application’s theme and requirements.
