type-guard_util v1.0.0

type switch in TS

Some utils, which using type guard in typescript, to do type-switch in typescript, like golang.

Using

install package

npm install type_guard_util

using

import { TypeIs } from '../src/TypeIs'

type Water = {
    drink: string
}

type Food = {
    eat: string
}

const example = (waterOrfood: Water | Food) => {
    if(TypeIs<Water, Water | Food>(waterOrfood, "drink")) {
        // waterOrfood is regarded as Water type here
    } else if(TypeIs<Food, Water | Food>(waterOrfood, "eat")) {
        // waterOrfood is regarded as Food type here
    }
}