Auto-save functionality for long forms
Auto-save is a feature that automatically stores form data at regular intervals or when certain changes are detected. This ensures that even if the user does not explicitly click “Save”….
Tag: React forms
Form validation message not displaying
If your form validation messages are not displaying, the issue is usually related to: Let’s go step by step to diagnose and fix this issue in different setups. Step 1:….
Accessing event.target.value after an asynchronous call (SyntheticEvent is nullified)
In React, when handling events like onChange or onClick, the SyntheticEvent object is pooled for performance reasons—meaning it gets nullified after the event handler finishes. If you try to access….
Forgetting default state values in functional components
Forgetting to set default state values in functional components can lead to unexpected behavior, runtime errors, or undefined values in your React app. This issue often occurs when using the….
Using event.preventDefault() in a non-existent event
A common JavaScript/React mistake is trying to call event.preventDefault() when: The Problem Correct Solutions 1. Proper Event Parameter Handling 2. Safe Event Checking 3. For Async Operations Why This Fails….
Not handling events properly in controlled components
Proper Event Handling in Controlled Components Controlled components in React require careful event handling to properly manage form inputs and user interactions. Here’s how to handle events correctly in controlled….
Controlled vs. Uncontrolled Components – Advanced Scenarios
Understanding the nuances between controlled and uncontrolled components is crucial for building robust React applications. While the basic concepts are straightforward, advanced scenarios require deeper consideration. Core Concepts Recap Controlled….
File Upload with Preview
File upload with preview is a common feature in modern web applications, allowing users to upload files (images, documents, etc.) and preview them before submitting. In React, this can be….
Autocomplete and Search in Forms
Autocomplete and search functionalities are common features in web forms, allowing users to search and select from a list of options quickly. These features enhance the user experience by providing….
Conditional Form Fields Rendering
Conditional rendering of form fields allows you to display or hide certain form elements based on the user’s input or application logic. This is commonly required in forms where the….