Creating a Floating Particles Neon Light Effect with HTML, CSS, and JavaScript

In this tutorial, we'll build a captivating neon light effect with floating particles using pure HTML, CSS, and JavaScript. We'll break down each component and explain how they work together to create this stunning visual effect.

1. Understanding the Core Structure

Let's start by breaking down the basic HTML structure:

    <title>Neon Light Effect</title>
    <meta name="viewport" content="width=device-width, initial-scale=1.0">


    <div>



<p>Here's what each element does:</p>

<ul>
<li>
light-effect: Main container for our neon effect</li>
<li>
light-inner: Creates the core glow effect</li>
<li>
light-outer: Adds an additional layer of luminosity and rotation</li>
</ul>

<h2>
  
  
  2. CSS Variables and Root Setup
</h2>

<p>First, let's understand our CSS variables:<br>
</p>

<pre class="brush:php;toolbar:false">:root {
    --blur-size: min(40vw, 40vh);
}

This variable is crucial because:

• Uses min() to ensure responsive sizing
• Combines viewport width (vw) and height (vh)
• Creates a proportional effect across different screen sizes

3. Body Styling Deep Dive

body {
    margin: 0;
    overflow: hidden;
    background: black;
    height: 100vh;
    width: 100vw;
    display: flex;
    justify-content: center;
    align-items: center;
}

Let's break down each property:

• margin: 0: Removes default spacing
• overflow: hidden: Prevents scrollbars and contains particles
• background: black: Creates contrast for the neon effect
• height/width: 100vh/vw: Ensures full viewport coverage
• display: flex: Enables centered positioning
• justify-content/align-items: center: Perfect centering

4. The Main Light Effect Container

.light-effect {
    width: var(--blur-size);
    height: var(--blur-size);
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    filter: blur(calc(var(--blur-size) * 0.25));
    animation: pulseNeon 8s ease-in-out infinite;
}

Key aspects explained:

1. Sizing: Uses the CSS variable for responsive dimensions
2. Positioning:
   • position: fixed: Ensures stability during scrolling
   • top/left: 50%: Positions at viewport center
   • transform: translate(-50%, -50%): Perfect centering
3. Blur Effect:
   • Dynamic blur based on size
   • Creates soft, realistic glow
4. Animation:
   • 8-second duration for smooth effect
   • ease-in-out timing for natural movement

5. Inner Light Layer Details

.light-inner {
    position: absolute;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle,
        rgba(138, 43, 226, 0.2) 0%,
        rgba(72, 61, 139, 0.15) 30%,
        rgba(0, 0, 255, 0.1) 50%,
        rgba(255, 255, 255, 0) 70%);
    mix-blend-mode: screen;
}

Gradient analysis:

1. Center (0%):
   • Purple tone with 20% opacity
   • Creates core brightness
2. Middle Layer (30%):
   • Darker purple at 15% opacity
   • Adds depth
3. Outer Layer (50%):
   • Blue tone at 10% opacity
   • Creates transition
4. Edge (70%):
   • Fades to transparent
   • Smooth edge blending

6. Outer Light Layer Details

.light-outer {
    position: absolute;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle,
        rgba(255, 255, 255, 0.15) 0%,
        rgba(138, 43, 226, 0.1) 40%,
        rgba(0, 0, 255, 0.05) 60%,
        rgba(255, 255, 255, 0) 80%);
    animation: rotateGradient 10s linear infinite;
    mix-blend-mode: screen;
}

Special effects breakdown:

1. Gradient Structure:
   • White center for intensity
   • Purple middle for color
   • Blue outer for depth
2. Animation:
   • 10-second rotation
   • Linear timing for smooth movement
3. Blending:
   • screen mode for luminous effect
   • Enhances glow and color mixing

7. Animation Keyframes Explained

    <title>Neon Light Effect</title>
    <meta name="viewport" content="width=device-width, initial-scale=1.0">


    <div>



<p>Here's what each element does:</p>

<ul>
<li>
light-effect: Main container for our neon effect</li>
<li>
light-inner: Creates the core glow effect</li>
<li>
light-outer: Adds an additional layer of luminosity and rotation</li>
</ul>

<h2>
  
  
  2. CSS Variables and Root Setup
</h2>

<p>First, let's understand our CSS variables:<br>
</p>

<pre class="brush:php;toolbar:false">:root {
    --blur-size: min(40vw, 40vh);
}

Animation details:

1. pulseNeon:
   • Maintains center position with translate
   • Scales between 1 and 1.1
   • Creates breathing effect
2. rotateGradient:
   • Full 360-degree rotation
   • Continuous movement
   • Adds dynamism

8. Particle System Deep Dive

body {
    margin: 0;
    overflow: hidden;
    background: black;
    height: 100vh;
    width: 100vw;
    display: flex;
    justify-content: center;
    align-items: center;
}

Particle characteristics:

1. Base Particle:
   • Fixed positioning
   • Semi-transparent white
   • Circular shape
   • No pointer events
2. Size Variants:
   • Responsive sizing using min()
   • Different animation speeds
   • Maintains proportions on all devices

9. Particle Movement Animation

.light-effect {
    width: var(--blur-size);
    height: var(--blur-size);
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    filter: blur(calc(var(--blur-size) * 0.25));
    animation: pulseNeon 8s ease-in-out infinite;
}

Movement breakdown:

1. Start (0%):
   • Begin below viewport
   • Invisible state
2. Fade In (20%):
   • Smooth opacity transition
3. Main Movement (20-80%):
   • Full visibility
   • Steady upward motion
4. Exit (80-100%):
   • Fade out effect
   • Slight overlap above viewport

10. Dynamic Particle Generation

.light-inner {
    position: absolute;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle,
        rgba(138, 43, 226, 0.2) 0%,
        rgba(72, 61, 139, 0.15) 30%,
        rgba(0, 0, 255, 0.1) 50%,
        rgba(255, 255, 255, 0) 70%);
    mix-blend-mode: screen;
}

Function analysis:

1. Particle Creation:
   • Dynamic DOM element creation
   • Random size assignment
   • Probabilistic distribution
2. Positioning Logic:
   • Random horizontal placement
   • Random animation delay
3. Memory Management:
   • Automatic cleanup
   • Duration based on size
   • Prevents memory leaks

11. Responsive Design Implementation

.light-outer {
    position: absolute;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle,
        rgba(255, 255, 255, 0.15) 0%,
        rgba(138, 43, 226, 0.1) 40%,
        rgba(0, 0, 255, 0.05) 60%,
        rgba(255, 255, 255, 0) 80%);
    animation: rotateGradient 10s linear infinite;
    mix-blend-mode: screen;
}

Responsive considerations:

1. Tablet Devices (≤768px):
   • Increased relative size
   • Maintains proportions
2. Mobile Devices (≤480px):
   • Maximum relative size
   • Optimized for small screens

12. Performance Optimization

@keyframes pulseNeon {
    0% {
        transform: translate(-50%, -50%) scale(1);
    }
    50% {
        transform: translate(-50%, -50%) scale(1.1);
    }
    100% {
        transform: translate(-50%, -50%) scale(1);
    }
}

@keyframes rotateGradient {
    0% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
    }
}

Optimization strategies:

1. Responsive Intervals:
   • Fewer particles on mobile
   • Adjusts to device capabilities
2. Memory Management:
   • Clears old intervals
   • Prevents multiple instances
3. Event Handling:
   • Responds to window resize
   • Maintains performance

Conclusion

This effect combines multiple layers of sophistication:

• Dynamic CSS variables for responsive sizing
• Complex gradient combinations for realistic glow
• Particle system for added depth
• Performance optimizations for smooth operation
• Responsive design for all devices

The result is a captivating neon effect that can enhance any web project with minimal performance impact.