Suggested topics
For further information, we recommend the following topics: Template-Driven Forms, Model-Driven Forms, Reactive Forms, JSON, RFC 7578, RFC 1341, URL Living Standard, HTML Living Standard, data validation, Angular validators, custom validators, asynchronous validators, regular expressions (regex), Angular pipes, FormBuilder, RxJS, Observables, Safe Navigation Operator (Elvis Operator), RxJS operators, Subject, debounceTime, throttleTime.