Solution: Build a Simple Validation Rule Builder
Explore how to create a RuleBuilder for form validation that lets you chain methods to set rules like required, minLength, and maxLength. Understand how to build complex validation objects step-by-step while ensuring only explicitly set rules appear in the final result. This lesson guides you through implementing and testing a flexible, fluent API for scalable validation logic.
We'll cover the following...
We'll cover the following...
Solution explanation
Line 3: We initialize an empty
rulesobject in the constructor to hold validation settings as the builder chain runs.Lines 6–19: We define fluent methods (
required,minLength,maxLength) that set rule properties and returnthis, supporting flexible chaining.Line 22: In
.build(), ...