2022-02-11
3007
#flutter
Eshiet Ekemini
43295
Feb 11, 2022 ⋅ 10 min read

Flutter form validation: The complete guide

Eshiet Ekemini A graduate of University of Uyo and a tech enthusiast, Ekemini has been building for mobile for two years, with a particular focus on Kotlin and Flutter.

Recent posts:

7 TUI Libraries For Creating Interactive Terminal Apps

7 TUI libraries for creating interactive terminal apps

When writing applications, a good user interface is just as important as the actual app’s functionality. A good user interface […]

Yashodhan Joshi
Jun 14, 2024 ⋅ 18 min read
Expo Router Adoption Guide Overview Examples And Alternatives

Expo Router adoption guide: Overview, examples, and alternatives

Expo Router provides an excellent file-based routing solution with crucial features such as deep linking and native support.

Marie Starck
Jun 13, 2024 ⋅ 8 min read
Superglue Vs. Hotwire For Modern Frontend Development

Superglue vs. Hotwire for modern frontend development

Explore how Superglue and Hotwire revolutionize frontend development with HTML over the wire, enhancing performance, flexibility, and ease of use.

Frank Joseph
Jun 12, 2024 ⋅ 7 min read
Using Pocketbase To Build A Full Stack Application

Using PocketBase to build a full-stack application

PocketBase is a performant Go-based tool that comes with essential features like user auth, file uploads, access control rules, and more.

Rahul Padalkar
Jun 11, 2024 ⋅ 18 min read
View all posts

4 Replies to "Flutter form validation: The complete guide"

  1. I got an error in the validation section then I solved the problem as follows;

    validator: (val) {
    if (!val.isValidName)
    return ‘Enter valid email’;
    },

    You cant return string or null in function, so you need to return empty string.If you do that it will solve.I did share code in the below

    validator: (val) {
    if (!val.isValidName)
    return ‘Enter valid email’;
    return ”;
    },

  2. Wow! So helpful in getting a handle on various validation and input field formatting in Flutter. Thank you! This is helpful and useful because it shows actual working examples, building from the basic form. The registration form is a particularly good example because it illustrates most use cases for starting programmers (in general, or just new to Flutter, like me).
    I’m not quite finished as I’ve got what I need for my current project, nonetheless I’m looking forward to the remainder (Making a custom form field, on). It really appears to fulfill on it’s title!

Leave a Reply