JavaScript Error Handling
Overview.
Error handling in JavaScript is the process of identifying, reporting, and resolving errors or exceptions that occur in a program.
JavaScript provides a variety of mechanisms for handling errors, such as try-catch
blocks and the throw
statement. By using these tools, developers can catch and handle errors gracefully, preventing crashes and unexpected behavior in their applications.
Effective error handling is an essential part of writing robust and reliable JavaScript code.
example:
try {
// code that may cause an error
const result = calculate(10, 0);
} catch (error) {
// handle the error
console.error("An error occurred:", error.message);
} finally {
// execute this code regardless of whether an error is thrown or not
console.log("Done.");
}
function calculate(num1, num2) {
if (num2 === 0) {
throw new Error("Cannot divide by zero.");
}
return num1 / num2;
}
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