Accessors are only available when targeting ECMAScript 5 and higher

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 ECMAScript 5 and higher. Animal.ts(14,13): error TS1056: > Accessors are only available when targeting ECMAScript 5 and higher.

interface IAnimal{
    name : string;
    sayName():string;
}

class AnimalImpm implements IAnimal{
    private _name : string = '[Animal]';
    get name():string{
        return this._name;
    }

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

    constructor(name:string){
        this.name = name;
    }

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

The only thing which worked for me was to specify the Target on macOS and Windows. Please note the parameter -t is standing for Target.

tsc -t es5 script.ts

You can run the command on your terminal.

try setting up a tsconfig.json file in your project:

{
  "compilerOptions": {
    "target": "es5"
  }
  "files": []
}

that will tell the typescript compiler to target a version specifically.

I was having the same problem. What I read from the docs is that the tsconfig.json file is ignored if you specify the files.

My tsconfig.json file

{
  "compilerOptions": {
    "target": "es5"
  },
  "include": [
    "*.ts"
  ]
}

And I run it from command line

tsc && node *.js

In Windows, the

tsc --target es5 filename.ts

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

If you're dealing with single file you could do this

tsc your-file.ts --target ES2016 --watch

If you wants inside your tsconfig.json for entire project configuration

{ "compilerOptions": { "target": "ES2016" } "files": [] }

You may want to use either ECMAScript numeric "es6", "es7", "es8" or year of release like "ES2015", "ES2016", "ES2017".

ESNext targets latest supported ES proposed features.

I know that is an old conversation, but i think that solution bellow could be a very helpful command for all developers here.

You can easily solve using this command in your Terminal, Command Prompt, Git Bash and etc:

tsc --target ES2016 Animal.ts --watch

or

tsc --target es5 Animal.ts --watch

--watch is optional and means that you doesn't need to compile your code in each modification.

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

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

Had the same issue, got it worked with this... for a single file!

tsc -target "es5" filename && node filename

• "es5" with quotes

• need not mention file extensions

• tsc -target "es5" filename - transpiles the typescript to "es5" JavaScript

• node filename - runs the transpiled javascript file

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" } ] }

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();

I targetted esnext and even with this I got the error. But for me it helped, targeting the .vue files in tsconfig.json. Like:

  "include": [
    "*.ts",
    "*.vue" // << added
  ],

Using Visual Stido 2017 ?
1- Solution Explorer>Right Click To Project
2- Add>New Item
3- (Search section >type this> typescript)
4- Select "TypeScript Json Configuration File"

thats it
at the end of this steps, tsconfig.json will be added to project with default set applied to ES5

you don't have to change anything. just recompile your project and error gonna out.

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)

Try using tsc myTS.ts --target ES5

this is because TypeScript should Traget ECMA script 5 compiler.

Finally worked out for me. Run the file then state the target flag

tsc script.ts --t es5 enter link description here

tsc -target "es5" filename  && node filename 

No need to specify the extension.

tsc .\main.components.ts --target ES5