ES2019-try-catch-error.js

// Let's take this JavaScript object and turn it into JSON
// Stringify should work -- it turns objects to JSON strings
// Parse should fail -- it turns JSON strings to objects
const myJavaScriptObject = {
  dog: "🐕",
  cat: "🐈",
  koala: "🐨",
  count: 3
};

// Before ES2019 -- Need to reference caught error
try {
  console.log(JSON.parse(myJavaScriptObject));
} catch (error) {
  console.log(error + "");
}
// result: SyntaxError: JSON.parse: unexpected character at line 1 column 2 of the JSON data

// Works in ECMAScript2019 -- Leave out error
try {
  console.log(JSON.parse(myJavaScriptObject));
} catch (error) {
  console.log("Whoops! That did not seem to be a JSON String... ");
}
// result: Whoops! That did not seem to be a JSON String...

// ES2019: No error, no problem -- we don't even really have to "catch it" as a parameter
try {
  console.log(JSON.stringify(myJavaScriptObject));
} catch {
  console.log("Whoops! That did not seem to be a JSON String... ");
}
// result: {"dog":"🐕","cat":"🐈","koala":"🐨","count":3}