TS1056

error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.

Broken Code ❌

1
2
3
4
5
6
7
8

class User {
  constructor(private firstName: string, private lastName: string) {
  }

  get fullName() {
    return `${this.firstName} ${this.lastName}`;
  }
}

1
2
3
4
5

{
  "compilerOptions": {
    "target": "es3"
  }
}

Fixed Code ✔️

Set the “target” property in your “tsconfig.json” file to “es5” or higher:

1
2
3
4
5

{
  "compilerOptions": {
    "target": "es5"
  }
}