48 lines
1.1 KiB
TypeScript
48 lines
1.1 KiB
TypeScript
import { expectType } from 'tsd'
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import { Ref, ref, isRef, unref } from './index'
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function plainType(arg: number | Ref<number>) {
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// ref coercing
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const coerced = ref(arg)
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expectType<Ref<number>>(coerced)
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// isRef as type guard
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if (isRef(arg)) {
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expectType<Ref<number>>(arg)
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}
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// ref unwrapping
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expectType<number>(unref(arg))
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// ref inner type should be unwrapped
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const nestedRef = ref({
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foo: ref(1)
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})
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expectType<Ref<{ foo: number }>>(nestedRef)
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expectType<{ foo: number }>(nestedRef.value)
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}
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plainType(1)
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function bailType(arg: HTMLElement | Ref<HTMLElement>) {
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// ref coercing
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const coerced = ref(arg)
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expectType<Ref<HTMLElement>>(coerced)
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// isRef as type guard
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if (isRef(arg)) {
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expectType<Ref<HTMLElement>>(arg)
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}
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// ref unwrapping
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expectType<HTMLElement>(unref(arg))
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// ref inner type should be unwrapped
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const nestedRef = ref({ foo: ref(document.createElement('DIV')) })
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expectType<Ref<{ foo: HTMLElement }>>(nestedRef)
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expectType<{ foo: HTMLElement }>(nestedRef.value)
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}
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const el = document.createElement('DIV')
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bailType(el)
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