Catching exceptions in a nested code in JavaScript

The peculiarity and convenience of exceptions is that they can be caught at any level of code nesting. Let's look at an example. Suppose we have a function that saves data to a local storage:

javascriptfunction save(str) {
  localStorage.setItem('key', str);
}

As you already know, when a storage overflows, the setItem method will throw an exception. It is not necessary, however, to catch this exception inside the save function. You can wrap in try each call to the function itself:

javascripttry {
  save('some string');
} catch (error) {
  alert('ran out of local storage space!');
}

javascriptfunction getArr(json) {
  return JSON.parse(json);
}

javascriptlet arr = getArr('[1,2,3,4,5]');
console.log(arr);