JavaScript - 75 Days Hard Challenge Ch-1 Introduction to JavaScript Ch-2 Programing Fundamentals in JavaScript Ch-3 V8 Engine | Interpreter & Compiler Ch-4 Variable & Functions in JavaScript Ch-5 Function Definition & Call in JavaScript Ch-6 DOM & id Selectors in JavaScript Ch-7 Events in JavaScript Ch-8 Built in & User Defined Function Ch-9 On Submit & Form Value in JavaScript Ch-10 Array & Objects in JavaScript Ch-11 Objects & Form Selector Values Ch-12 Create | Delete & Update Objects Keys Ch-13 Global and Local Scopes variable object Ch-14 Conditions & Form Validation Ch-15 Bulding Calculator Project JavaScript Ch-16 Even Odd Project in JavaScript Ch-17 If Else Else-if in JavaScript Ch-18 Class Name vs Class List in JavaScript Ch-19 Admin Panel Layout in JavaScript Ch-20 Dynamic Tabs in JavaScript Ch-21 Form Validation Singup Login Ch-22 Password Validation show hide & length Ch-23 Login form validation in JavaScript Ch-24 Set Timeout App in JavaScript Ch-25 For Loop in JavaScript Ch-26 Class & Element Selector in JavaScript Ch-27 Programming Questions For Loop Ch-28 Dynamic Elements in JavaScript Ch-29 Build Loop App in JavaScript Ch-30 Build Animation.style Website Ch-31 CRUD Operations in JavaScript Ch-32 Build Marksheet CRUD App in JavaScript Ch-33 Build Marksheet CRUD App in JavaScript Ch-34 Build Marksheet CRUD App in JavaScript Ch-35 Build Marksheet CRUD App in JavaScript Ch-36 Build Marksheet CRUD App in JavaScript Ch-37 Build Marksheet CRUD App in JavaScript Ch-38 jsPDF Build Pdf Table Marksheet Ch-39 jsPDF Export to PDF in JavaScript Ch-40 jsPDF Export to PDF in JavaScript What is Ajax & Http Request Ch-41 jsPDF Export to PDF in JavaScript Ch-42 Build Gallery and Files Upload & Preview Ch-43 Build Gallery and Files Upload & Preview Ch-44 Multiple Files Upload & Live Preview Ch-45 Tailwind CSS Tutorial in Hindi Ch-46 Build PDF Reader and Show PDF file HTML Ch-47 Build Audio Player and Upload Play Audio Ch-48 Build Audio Player and Upload Play Audio Ch-49 Build Audio Player and Upload Play Audio Ch-49 Build Audio Player | Upload Play Audio Ch-50 Local Storage & Session Storage Ch-51 Local Storage set get remove clear item Ch-52 Build Crud App local Storage Ch-53 Build Crud App local Storage Ch-54 Build Crud App local Storage Ch-55 Build Crud App local Storage Ch-56 local Storage functions and properties Ch-57 session Storage set get key remove clear Ch-58 Cookies document.cookie Ch-59 Synchronouse vs Asynchronouse Ch-60 Promise Then Try Catch Async Await Ch-61 Ajax Request Http Request Ch-62 Try Catch Finally Async Await Fetch Ch-63 Fetch Get Post Put Delete Request Ch-64 Axios Get Post Put Delete Request Ch-65 Axios Tailwind Css Http Request Ch-66 ES6 EcmaScript Let Var Const Ch-67 ES6 Destructuring Array & Object Filter Ch-68 E-Commerce Project Ch-69 E-Commerce Project Ch-70 E-Commerce Project Ch-71 E-Commerce Project Ch-72 E-Commerce Project Ch-73 E-Commerce Project Ch-74 E-Commerce Project Ch-75 E-Commerce Project Manage Software Projects in Team or Single

CodingOtt

Building Career Without Degree

Placement Assistance Webinar Placement Reports

Course reviews Devtools Sign in

Ch-23 Login form validation in JavaScript

9 Jan 2024

Ch-23 Login form validation in JavaScript

Notes and Source Code

Files
23-javascript-n.zip
23-javascript-sc.zip

1

CodingOTT

Learn MERN, DevOps, Cloud & Full Stack with real-world projects, placement support, and certifications.

Explore

MERN Stack
DevOps
Cloud
Testimonials

Policies

Privacy Policy
Refund Policy
Terms & Conditions

Contact

support@codingott.com
Contact Page →

© 2026 CodingOTT. All rights reserved.

JavaScript - 75 Days Hard Challenge Ch-1 Introduction to JavaScript Ch-2 Programing Fundamentals in JavaScript Ch-3 V8 Engine | Interpreter & Compiler Ch-4 Variable & Functions in JavaScript Ch-5 Function Definition & Call in JavaScript Ch-6 DOM & id Selectors in JavaScript Ch-7 Events in JavaScript Ch-8 Built in & User Defined Function Ch-9 On Submit & Form Value in JavaScript Ch-10 Array & Objects in JavaScript Ch-11 Objects & Form Selector Values Ch-12 Create | Delete & Update Objects Keys Ch-13 Global and Local Scopes variable object Ch-14 Conditions & Form Validation Ch-15 Bulding Calculator Project JavaScript Ch-16 Even Odd Project in JavaScript Ch-17 If Else Else-if in JavaScript Ch-18 Class Name vs Class List in JavaScript Ch-19 Admin Panel Layout in JavaScript Ch-20 Dynamic Tabs in JavaScript Ch-21 Form Validation Singup Login Ch-22 Password Validation show hide & length Ch-23 Login form validation in JavaScript Ch-24 Set Timeout App in JavaScript Ch-25 For Loop in JavaScript Ch-26 Class & Element Selector in JavaScript Ch-27 Programming Questions For Loop Ch-28 Dynamic Elements in JavaScript Ch-29 Build Loop App in JavaScript Ch-30 Build Animation.style Website Ch-31 CRUD Operations in JavaScript Ch-32 Build Marksheet CRUD App in JavaScript Ch-33 Build Marksheet CRUD App in JavaScript Ch-34 Build Marksheet CRUD App in JavaScript Ch-35 Build Marksheet CRUD App in JavaScript Ch-36 Build Marksheet CRUD App in JavaScript Ch-37 Build Marksheet CRUD App in JavaScript Ch-38 jsPDF Build Pdf Table Marksheet Ch-39 jsPDF Export to PDF in JavaScript Ch-40 jsPDF Export to PDF in JavaScript What is Ajax & Http Request Ch-41 jsPDF Export to PDF in JavaScript Ch-42 Build Gallery and Files Upload & Preview Ch-43 Build Gallery and Files Upload & Preview Ch-44 Multiple Files Upload & Live Preview Ch-45 Tailwind CSS Tutorial in Hindi Ch-46 Build PDF Reader and Show PDF file HTML Ch-47 Build Audio Player and Upload Play Audio Ch-48 Build Audio Player and Upload Play Audio Ch-49 Build Audio Player and Upload Play Audio Ch-49 Build Audio Player | Upload Play Audio Ch-50 Local Storage & Session Storage Ch-51 Local Storage set get remove clear item Ch-52 Build Crud App local Storage Ch-53 Build Crud App local Storage Ch-54 Build Crud App local Storage Ch-55 Build Crud App local Storage Ch-56 local Storage functions and properties Ch-57 session Storage set get key remove clear Ch-58 Cookies document.cookie Ch-59 Synchronouse vs Asynchronouse Ch-60 Promise Then Try Catch Async Await Ch-61 Ajax Request Http Request Ch-62 Try Catch Finally Async Await Fetch Ch-63 Fetch Get Post Put Delete Request Ch-64 Axios Get Post Put Delete Request Ch-65 Axios Tailwind Css Http Request Ch-66 ES6 EcmaScript Let Var Const Ch-67 ES6 Destructuring Array & Object Filter Ch-68 E-Commerce Project Ch-69 E-Commerce Project Ch-70 E-Commerce Project Ch-71 E-Commerce Project Ch-72 E-Commerce Project Ch-73 E-Commerce Project Ch-74 E-Commerce Project Ch-75 E-Commerce Project Manage Software Projects in Team or Single