try catch woith error javascript code example

Example 1: js should i use try catch

One should avoid throw errors as the way to pass error conditions
around in applications.

The throw statement should only be used
"For this should never happen, crash and burn. Do not
recover elegantly in any way"

try catch however is used in situation where host objects
or ECMAScript may throw errors.

Example:
-------------------------------------
var json
try {
    json = JSON.parse(input)
} catch (e) {
    // invalid json input, set to null
    json = null
}
-------------------------------------

Example 2: 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
}