Handling Errors in TypeScript without Effect/Either/Option
Can someone explain to me how you are supposed to handle errors in typescript without Effect/Either/Option?
Is using multiple try/catch blocks the best (only?) solution?
Is using multiple try/catch blocks the best (only?) solution?
export interface ApiResponse {
id: number;
name: string;
}
export class ResponseError extends Error {
constructor() {
super();
this.name = "ResponseError";
}
}
export class NoOkayError extends Error {
constructor() {
super();
this.name = "NoOkayError";
}
}
export class JsonError extends Error {
constructor() {
super();
this.name = "JsonError";
}
}
export class FormattingError extends Error {
constructor() {
super();
this.name = "FormattingError";
}
}
export const program = async () => {
var response;
try {
response = await fetch(`${BASE_URL}/api`, { method: "GET" });
} catch (_) {
throw new ResponseError();
}
if (!response.ok) {
throw new NoOkayError();
}
var json;
try {
json = await response.json();
} catch (_) {
throw new JsonError();
}
if (
json["name"] === undefined ||
json["id"] === undefined ||
isNaN(Number(json["id"]))
) {
throw new FormattingError();
}
return json as ApiResponse;
};export interface ApiResponse {
id: number;
name: string;
}
export class ResponseError extends Error {
constructor() {
super();
this.name = "ResponseError";
}
}
export class NoOkayError extends Error {
constructor() {
super();
this.name = "NoOkayError";
}
}
export class JsonError extends Error {
constructor() {
super();
this.name = "JsonError";
}
}
export class FormattingError extends Error {
constructor() {
super();
this.name = "FormattingError";
}
}
export const program = async () => {
var response;
try {
response = await fetch(`${BASE_URL}/api`, { method: "GET" });
} catch (_) {
throw new ResponseError();
}
if (!response.ok) {
throw new NoOkayError();
}
var json;
try {
json = await response.json();
} catch (_) {
throw new JsonError();
}
if (
json["name"] === undefined ||
json["id"] === undefined ||
isNaN(Number(json["id"]))
) {
throw new FormattingError();
}
return json as ApiResponse;
};
