typescript define function as type code example
Example 1: typescript function
function greet(name: string): string {
return name.toUpperCase();
}
console.log(greet("hello"));
console.log(greet(1));
Example 2: typescript function type
function sayHello(name: string): string {
console.log(`Hello, ${name}`!);
}
sayHello('Bob');
Example 3: typescript function
function add(x: number, y: number): number {
return x + y;
}
let myAdd = function (x: number, y: number): number {
return x + y;
};
Example 4: types function typescript
interface Better_still_safe_but_way_more_flexible_fix {
title: string;
callback: <T = unknown, R = unknown>(args?: T) => R;
}
interface Alternate_Syntax_4_Better_still_safe_but_way_more_flexible_fix {
title: string;
callback<T = unknown, R = unknown>(args?: T): R;
}