catch error js code example

Example 1: try catch in javascript

try {
  // Try to run this code 
}
catch(err) {
  // if any error, Code throws the error
}
finally {
  // Always run this code regardless of error or not
  //this block is optional
}

Example 2: catch error message js

try {
  // test code
} catch (error) { // if error
  console.error(error); // return error
}

Example 3: catch javascript

//Catch is the method used when your promise has been rejected.
//It is executed immediately after a promise's reject method is called.
//Here’s the syntax:


myPromise.catch(error => {
  // do something with the error.
});

//error is the argument passed in to the reject method.

Example 4: javascript try

var someNumber = 1;
try {
  someNumber.replace("-",""); //You can't replace a int
} catch(err) {
 console.log(err);
}

Example 5: try catch javascript

"The try...catch statement marks a block of statements to try and specifies"
"a response should an exception be thrown."

try {
  nonExistentFunction();
} catch (error) {
  console.error(error);
  // expected output: ReferenceError: nonExistentFunction is not defined
  // Note - error messages will vary depending on browser
}

Example 6: js throw new error

throw new Error("message");