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How to fix the ‘ts2769: no overload matches this call.’ error with TypeScript?

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To fix the ‘ts2769: no overload matches this call.’ error with TypeScript, we should call a function with the arguments that matches one of the signatures of the function.

For instance, we write

function foo(str: "hello"): string;
function foo(str: "world"): string;
function foo(str: "hello" | "world"): string {
  return str;
}

foo("hello");

to define the foo function with multiple signatures.

It accepts the str parameter which can be either 'hello' or 'world'.

And then we call foo with 'hello' to we avoid the error.

If we call foo with something other than 'hello' or 'world', then we get this error.

By John Au-Yeung

Web developer specializing in React, Vue, and front end development.

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