Try…catch in JavaScript is a programming construct used to handle errors and exceptions in code. The try block contains the code that might throw an error, while the catch block is used to handle errors that occur within the try block.
Here is an example of how try…catch works in JS:
try {
// Code block where the error might occur
let x = y + z;
} catch(error) {
// Block for handling errors
console.log(“An error occurred: ” + error);
}
In the above example, the code within the try block would throw an error if the variables y and z were not defined. The catch block would then execute, printing a message to the console indicating that an error occurred.
Try…catch is an important tool for preventing code crashes and improving the stability of JavaScript programs. By handling errors in a more controlled manner, developers can create more robust applications that are less prone to crashes and unexpected behavior.