Mastering Liquid Glass in WhatsApp's In-Chat Interface: A Developer's Guide

Overview

WhatsApp's gradual introduction of the Liquid Glass aesthetic has been one of the most anticipated UI refreshes in recent memory. While the main Chats screen has already started showing signs of this frosted, glass-like finish, Meta is now turning its attention to the in-chat interface. This guide walks you through the technical and design considerations behind bringing Liquid Glass to message threads, from understanding the core concepts to implementing a cohesive experience. Whether you're a frontend developer curious about the underlying rendering logic or a designer aiming to align your own apps with this style, you'll find actionable insights here.

Mastering Liquid Glass in WhatsApp's In-Chat Interface: A Developer's Guide — Source: 9to5mac.com

Prerequisites

Before diving into the step-by-step process, make sure you have a solid grasp of the following:

UI/UX design principles – familiarity with blur effects, layering, and depth cues.
Material You / dynamic theming – Liquid Glass builds on Android's Monet system, so understanding how color extraction works is helpful.
Experience with mobile UI development – either native (Kotlin for Android, Swift for iOS) or cross-platform (React Native, Flutter).
Basic knowledge of OpenGL or Skia – advanced blur and transparency effects often require custom rendering pipelines.
Access to WhatsApp Beta – to test the feature live, ensure you're enrolled in the beta program (optional but recommended).

Step-by-Step Implementation of Liquid Glass in Chat

The following steps outline the logical progression Meta likely follows to integrate the Liquid Glass aesthetic into the in-chat interface. You can adapt these for your own project.

1. Analyze the Existing Chat UI Layers

Begin by decomposing the current chat interface into its primary visual layers:

Background – usually a solid color derived from the wallpaper or chat theme.
Chat bubbles – sent and received messages with distinct colors and shapes.
Input area – text field, attachment icons, and emoji picker.
Date dividers – thin lines separating messages by day.
Navigation bar – system or custom bar at the top/bottom.

Each layer must be assigned a material depth to simulate the glass effect. For instance, the background should sit at the lowest depth, while the input area floats above.

2. Choose a Blur Implementation

The defining characteristic of Liquid Glass is the live blur behind interactive elements. There are two common approaches:

Native Bitmap Blur – capture the screen region beneath a view, blur it using a RenderScript (Android) or CIFilter (iOS), then render as a background. This is resource-intensive but yields authentic glass.
Static Pre-blurred Textures – use pre-rendered blurred images that change only when the underlying content changes significantly (e.g., background color shift). This is lighter on performance.

For WhatsApp, Meta likely uses a hybrid: a real-time blur for the input area (where keyboard interaction changes the view) and static textures for chat bubbles and dividers to maintain smooth scroll performance.

3. Apply Dynamic Tinting Based on Monet

Liquid Glass is not just blur; it also inherits color tones from the user's wallpaper via Material You. To simulate this:

Extract dominant and accent colors from the wallpaper using the WallpaperColors API on Android.
Map those colors to the layer’s tint: the background gets a subtle hue, chat bubbles get a stronger tint, and the input area uses a complementary accent.
Ensure the tint changes dynamically when the user changes their wallpaper. Use a WallpaperManager listener to update the theme in real time.

In code (Android example):

WallpaperManager wallpaperManager = WallpaperManager.getInstance(context);
WallpaperColors colors = wallpaperManager.getWallpaperColors(WallpaperManager.FLAG_SYSTEM);
if (colors != null) {
    int primary = colors.getPrimaryColor().toArgb();
    int secondary = colors.getSecondaryColor().toArgb();
    // Apply to chat background and bubbles
}

4. Add Subtle Depth Animations

Liquid Glass feels organic because interactive elements respond to touch with a slight “push” effect. When the user taps a bubble or the input field:

Increase the blur radius behind the element by 10–15%.
Change the tint to a slightly brighter or darker shade.
Animate a tiny offset (e.g., 2dp) to mimic pressing into the glass.

Use Compose or UIViewPropertyAnimator to animate these changes with a duration around 200ms and an easing curve like FastOutSlowIn.

5. Optimize for Scroll Performance

The chat list is a high-performance scrolling area. Applying live blur to hundreds of items can tank the frame rate. Mitigations:

Use RecyclerView with view pooling – pre-inflate blurred backgrounds and reuse them.
Limit blur radius updates – only recompute the blur when the view becomes visible (via OnScrollListener).
GPU acceleration – offload blur calculations to the GPU using RenderNode on Android or UIView.drawHierarchy on iOS.

6. Test Across Devices and Themes

Liquid Glass must work consistently on low-end and high-end devices, and with light/dark mode. Create a test matrix:

Wallpaper types – solid colors, gradients, complex images.
System themes – light, dark, auto.
Keyboard states – with or without the virtual keyboard open (affects the input area blur).
Accessibility – ensure that increased blur does not reduce contrast below WCAG AA standards.

Common Mistakes

Mistake 1: Over-blurring the Background

Applying too high a blur radius (e.g., above 40dp) makes the UI feel muddy and reduces readability. Stick to a range of 16–24dp for most layers.

Mistake 2: Ignoring Battery Impact

Real-time blur is a heavy GPU operation. If the phone heats up or drains battery quickly, users will disable the feature. Always provide a toggle to fall back to solid colors.

Mistake 3: Forgetting Dark Mode Adaptations

In dark mode, the glass effect should become more transparent and the blur should pick up darker tones from the wallpaper. Failing to adjust tint leads to a washed-out look.

Mistake 4: Breaking Accessibility

Users with visual impairments may rely on high contrast. Liquid Glass, by design, reduces contrast. Make sure text remains legible by adding a thin shadow or an opaque background behind text labels.

Summary

Bringing Liquid Glass to WhatsApp’s chat interface requires a careful balance of aesthetic delight and technical performance. By following the six steps outlined above—layer analysis, blur choice, dynamic tinting, depth animations, scroll optimization, and thorough testing—you can recreate the same fluid, glass-like experience. Remember to avoid common pitfalls like over-blurring, battery drain, and accessibility barriers. As Meta continues its rollout, staying aligned with these principles will ensure your own implementations feel native and polished. Keep an eye on WhatsApp Beta updates for the exact timing of the in-chat Liquid Glass debut.