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torgeir/typescript-json-cast-any-to-t.ts

Created October 23, 2024 19:10
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  1. torgeir created this gist Oct 23, 2024.
    12 changes: 12 additions & 0 deletions typescript-json-cast-any-to-t.ts
    View file
    Original file line number Diff line number Diff line change
    @@ -0,0 +1,12 @@
    async function typedFetch<T>(): Promise<T> {
    let res = await fetch("http://ip.jsontest.com/");
    let json = res.json();
    return json; // actually Promise<any>
    }

    type Ip = { ip: String };

    (async function () {
    let ip = await typedFetch<Ip>();
    console.log(ip); // Ip
    })();