How does a try catch work in JavaScript 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: try catch javascript

try {
  // code may cause error
} catch(error){
  // code to handle error
}