JavaScript Tutorial

The language for programming web pages.

Chapter Quiz Exercises
Course Topics
JS Introduction JS Where To JS Output JS Variables JS Data Types JS Functions JS Objects JS Arrays JS Strings JS If Conditions JS Loops JS Math JS Errors JS Scope JS DOM JS Events JS Promises & Async JS Classes JS JSON JS RegExp

JS Errors

JavaScript Error Handling

JavaScript uses try...catch...finally to handle runtime errors gracefully without crashing the program.

Error Types:

  • SyntaxError — Invalid code
  • ReferenceError — Variable not defined
  • TypeError — Wrong type operation
  • RangeError — Value out of range
  • URIError — Bad URI encoding

Custom Errors:

Use throw new Error("message") to throw custom errors.

Try It Yourself

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Topics
JS Introduction JS Where To JS Output JS Variables JS Data Types JS Functions JS Objects JS Arrays JS Strings JS If Conditions JS Loops JS Math JS Errors JS Scope JS DOM JS Events JS Promises & Async JS Classes JS JSON JS RegExp