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JavaScript Error Handling

JavaScript Error Handling

JavaScript error handling prevents broken code from crashing the app.

Read Time
5 min read
Difficulty
Beginner
Last Updated
Jun 15, 2026
Version
v1.0.0

Introduction

JavaScript programs stop working completely if they hit an error. Developers use `try/catch` blocks to gracefully handle these errors. Instead of crashing, the code catches the mistake and runs a backup plan.

Example

Example
1/* this handles errors */
2try {
3  fakeFunction();
4} catch (err) {
5  console.log("An error happened: " + err.message);
6} finally {
7  console.log("This runs no matter what.");
8}

Key Points

  • The `try` block holds code that might fail.
  • The `catch` block runs only if an error occurs.
  • The `finally` block runs regardless of success or failure.
  • The `throw` statement creates custom errors.

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