About javascript try catch

(There is a lack of information, so the answer may be wrong.)

try{...}catch catches exceptions that occurred in code that ran from the beginning to the end of the blocks surrounded by them.Exceptions to functions defined in this block but not running are not covered.

function foo(){
  // Exceptions from this function can be caught in the catch below.
}

try{
  foo();
  document.addEventListener("load", function(e){
    // This function does not run until catch.
    // Exceptions cannot be caught in the catch below.
  });
} catch(e){
  // …
}

You may be able to use the error event for logging purposes.

window.addEventListener("error", function(e){
  // e.error is the exception
});

Even if you try to catch the javascript code, it will not catch it.
However, if you try to catch the code with the error, it will catch it.
Is there something wrong?

Correct!

Trycatch is a way to take some remedial action (e.g., detailing the errors and exceptions that occurred (helpful for debugging) or taking some action (e.g., closing all files used to prevent data loss) rather than abandoning "An exception has occurred."