error TS5107: Option 'target=ES5' is deprecated and will stop functioning in TypeScript 7.0. Specify compilerOption '"ignoreDeprecations": "6.0"' to silence this error.


!!! error TS5107: Option 'target=ES5' is deprecated and will stop functioning in TypeScript 7.0. Specify compilerOption '"ignoreDeprecations": "6.0"' to silence this error.
==== emitArrowFunction.ts (0 errors) ====
    var f1 = () => { }
    var f2 = (x: string, y: string) => { }
    var f3 = (x: string, y: number, ...rest) => { }
    var f4 = (x: string, y: number, z = 10) => { }
    function foo(func: () => boolean) { }
    foo(() => true);
    foo(() => { return false; });