Sometimes, subtle design elements can make a huge difference in user experience. Instead of displaying traditional error messages, a "shaking" effect on a login popover provides a clear and immediate indication that something went wrong. This tutorial will guide you through implementing this functionality using vanilla JavaScript , CSS animations , and the open-source library Tippy.js.
Our objective is to:
- Create a login popover with Tippy.js.
- Add the "shaking" effect when errors occur.
- Automatically reset the animation once the shake ends.
Let’s dive in!
Part 1: Setting Up the Shaking Animation with CSS
We’ll start by defining a reusable CSS animation for the shake effect. The @keyframes rule below mimics a side-to-side shake:
@keyframes shaking { 10%, 90% { transform: translate3d(-1px, 0, 0); } 20%, 80% { transform: translate3d(2px, 0, 0); } 30%, 50%, 70% { transform: translate3d(-4px, 0, 0); } 40%, 60% { transform: translate3d(4px, 0, 0); } } .shake { animation: shaking 0.82s cubic-bezier(.36,.07,.19,.97) both; } - Keyframe Details : The
translate3dproperty moves the popover slightly to the left and right to create the shaking effect. - Reusable Class : Applying the
shakeclass to any element triggers the animation.
Part 2: Creating the Login Popover with Tippy.js
We’ll use Tippy.js to create a clickable login popover. The popover will include:
- An email input field.
- A "Sign In" button.
- Event listeners to handle sign-in logic and the shake effect.
Here’s the core JavaScript for setting up the popover:
Step 1: The Sign-In Class
APP.Signin = class { constructor($target) { this.values = {}; // Store any required state if ($target) this.$target = $target; // The DOM element triggering the popover this.init(); // Initialize the popover return this; } // Trigger the shake animation shake() { this.$tippy.classList.add('shake'); return this; } // Handle Sign-In button clicks onSigninClicked(event) { event.preventDefault(); // Retrieve the entered email let email = document.querySelector('.app-signin-email').value; // Error and success handlers let _onError = () => this.shake(); let _onSuccess = (response) => { if (response.errors.length) { this.shake(); // Shake on error } else { // Handle successful login console.log('Login successful!'); } }; // Simulate a backend login request let form_data = new FormData(); form_data.append('method', 'quickSignIn'); form_data.append('email', email); axios({ method: 'POST', url: 'path/to/server', data: form_data, headers: { 'content-type': 'application/x-www-form-urlencoded;charset=UTF-8' }, }) .then((response) => (typeof response.data === 'string' ? JSON.parse(response.data) : response.data)) .then(_onSuccess) .catch(_onError); } // Define the HTML content of the popover getContent() { return ` <div class="app-signin"> <label class="form-label app-signin-form-elm app-signin-label">Account Email</label> <input type="text" class="app-signin-form-elm app-signin-input app-signin-email" value="" placeholder="e.g., jdoe@email.com"> <a href="#" class="app-signin-form-elm app-signin-btn">Sign In</a> </div> `; } // Initialize the popover init() { let $content = this.getContent(); if (this.$target) { tippy(this.$target, { content: $content, allowHTML: true, trigger: 'click', hideOnClick: true, interactive: true, arrow: true, animation: 'scale', placement: 'bottom', theme: 'white', offset: [0, 15], onMount: () => { this.$tippy = document.querySelector('.tippy-box'); // The popover box this.$content = document.querySelector('.app-signin'); this.$signin_btn = document.querySelector('.app-signin-btn'); this.$email = document.querySelector('.app-signin-email'); // Add event listeners this.$signin_btn.addEventListener('click', this.onSigninClicked.bind(this)); this.$email.addEventListener('keypress', (event) => { if (event.key === 'Enter') { event.preventDefault(); this.$signin_btn.click(); } }); // Remove the shake class after animation ends this.$tippy.addEventListener('animationend', () => { this.$tippy.classList.remove('shake'); }); this.$email.focus(); // Auto-focus on the email input }, }); } } }; // Initialize the Sign-In popover on page load document.addEventListener('DOMContentLoaded', () => { new APP.Signin(document.querySelector('.app-header-control-signin')); }); 2228+ FREE RESOURCES FOR DEVELOPERS!! ❤️ 😍🥳 (updated daily)
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Part 3: Wiring It All Together
Simulated Backend : If you don’t have a real server, mock responses with a promise:
const mockServer = (email) => new Promise((resolve, reject) => { setTimeout(() => { if (email === 'test@email.com') resolve({ errors: [] }); else reject({ errors: ['Invalid email'] }); }, 500); }); CSS for the Popover : Ensure the popover matches your design. Here’s a simple setup:
.app-signin { display: flex; flex-direction: column; gap: 10px; } .app-signin-email { width: 100%; padding: 10px; font-size: 1rem; border: 1px solid #ccc; border-radius: 4px; } .app-signin-btn { background-color: #007bff; color: white; text-align: center; padding: 10px; border-radius: 4px; cursor: pointer; } .app-signin-btn:hover { background-color: #0056b3; } HTML Trigger Element : Add a trigger element to your HTML:
<button class="app-header-control-signin">Sign In</button> Part 4: Test the Shaking Effect
- Click the Sign In button to open the popover.
- Enter an invalid email and submit. Watch the popover shake, indicating an error.
- Enter a valid email and see no shaking—success!
Conclusion: A User-Friendly Error Cue
The shaking effect enhances user experience by offering a clear, intuitive error indicator without cluttering the UI with extra messages. Combined with Tippy.js for a sleek popover and vanilla JS for interactivity, this setup is clean, functional, and visually appealing.
Keep experimenting and tweaking—because great UX is all about the details!
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Top comments (1)
Great tutorial to improve forms UX