Tag: JavaScript

Wrap risky code with try/catch/finally.

Combine Constraint Validation API with custom checks.

Match patterns with RegExp literals and methods like test/match/replace.

Persist client data with localStorage, sessionStorage, and cookies.

Save string key/values that persist across sessions.

Store per-tab temporary data with sessionStorage.

Read inputs, listen to submit, and build FormData.

Respond to user and browser events (click, input, submit, load).

Attach handlers with addEventListener and remove them when needed.

Understand capture → target → bubble propagation phases.