How to write reusable errors?

I have a function that evaluates an object, if its true, it pushes the object into an empty array if its false it needs to throw an error. How do I structure the Error so it's reusable, and can be overridden with some other message. Is it possible to not use the Try block?

const object1={
title: "The Bridge",
grade: 4.0,
score: "Drama/Horrorr"
}

const object2={
title:"Better Call Saul",
score:7.0,
}
let shows=;

function Add(param){
if(param.hasOwnProperty("title") &&
param.hasOwnProperty("score") &&
param.hasOwnProperty("genre")) {
shows.push(param);
}
else{
throw "Object is missing a property !";
}
add(object1);
add(object2);

try{

}
catch(param){

}

Add(object1);
Add(object2);


Error

1 Answer
1

Using try/catch is the most standard approach in javascript. I would stick with that instead of trying to fight the tide.
throwing an Error object is also the standard object to throw

throw new Error('message')


or construct the error and add properties to it

const err = new Error('message')
err.code = 1234
throw err


You could derive a class from the Error class and add your own properties to it if you want something more reusable.

Error

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