Accessors are only available when targeting ECMAScript 5 and higher

Question

I am trying to run this code but it is giving me following errors:

Animal.ts(10,13): error TS1056: Accessors are only available when targeting ECMAS

Answer 1

Try using tsc myTS.ts --target ES5

this is because TypeScript should Traget ECMA script 5 compiler.

Answer 2

In Windows, the

tsc --target es5 filename.ts

options can be: 'es3', 'es5', 'es6', 'es2015', 'es2016', 'es2017', 'esnext'. (without '')

Answer 3

I had the same problem trying to compile TypeScript code with Visual Studio Code. This solved the issue:

1) tsconfig.json - add the target in the compilerOptions:

{
    "compilerOptions": {
        "target": "es5",  // <-- here!
        "module": "commonjs",
        "sourceMap": true
    }
}

2) tasks.json - add the target argument:

{
    "version": "2.0.0",
    "tasks": [
        {
            "taskName": "build",
            "type": "process",
            "command": "tsc",
            "args": [
                "ts/Program.ts",
                "--outDir", "js",
                "--sourceMap",
                "--watch",
                "--target", "es5"  // <-- here!
            ],
            "group": {
                "kind": "build",
                "isDefault": true
            },
            "presentation": {
                "reveal": "always"
            },
            "problemMatcher": "$tsc"
        }
    ]
}

Answer 4

Here you need to pass the switch to type script compiler, so it target ECMAScript file. To do that enter below code in the terminal

tsc (your ts file).ts --target ES5 and run your bulid js file

node (your js file)

Answer 5

Here is a simple solution

tsc file.ts --target ES5 && node file.js 

Note: Ensure you make use of your file name. This would only be applicable for you if the name of your .ts file is file.

I think a cleaner way of writing that code would have been this

class AnimalImpm {
        constructor(private _name?:string){
            this.name = name;
        }

        get name():string{
            return this._name;
        }

        set name(name:string){
            this._name = name;
        }

        sayName():string {
            console.log(`My name is ${this.name}`);
            return "Hello";
        }
    }

let data = new AnimalImpm('Animal');
    data.name;
    data.name = 'newAnimal';
    data.sayName();

Answer 6

In my case, I only needed to add the target.

 tsc *.ts --target ES5 && node *.js