Robust Error Handling for JavaScript Classes: Best Practices and Examples

Strengthen your code defenses against exceptions and failures with proven strategies

Photo by Jimmy Ofisia on Unsplash

Errors and exceptions inevitably crop up in every software project, irrespective of platform, language, or framework used. Anticipating, detecting, and recovering from such anomalous events separates reliable, stable applications from buggy, unreliable ones.

This article covers error handling techniques for JavaScript classes, arming readers with actionable insights for reinforcing defensive lines and safeguarding mission-critical functionality.

Built-in Exception Types

JavaScript defines several built-in exception types, useful for categorizing distinct flavors of errors occurring naturally throughout runtime environments. Some notable examples include:

• EvalError: Issues related to malformed eval calls
• RangeError: Invalid values falling beyond acceptable ranges
• ReferenceError: Illegal references to undefined symbols
• SyntaxError: Misconfigured syntactic constructs
• TypeError: Type mismatches causing unexpected consequences