Errors may occur due to a number of reasons. Like in most other programming languages, try-catch is used to handle the errors occured.

There are three types of errors in programming:

1. Syntax Errors

Syntax errors are the ones which occur in compile time due to incorrect syntax.

Example

console.log(3+2; // missing )

2. Runtime Errors

Runtime errors are the ones which occurs during execution time. Though syntactically it is correct, it is calling an unknown function

Example

let x = 3;
let y = 10;

console.log(sum(x,y)); // calling unknown function

3. Logical Errors

Logical errors are the complex ones to find as they occur due to errors in your program logic. Based on the requirement you can put try-catch blocks to catch exceptions.

Syntax

try {
    //code
} catch(err) {
    //code
}

General errors on webpages

chrome, Firefox, IE, Edge etc

• Press F12 to see the console which displays errors if any on the webpage.