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fix(dropdown): prevent background scrolling on mobile (#1022)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,59 @@ | ||
| import { | ||
| computed, | ||
| onBeforeUnmount, | ||
| ref, | ||
| toValue, | ||
| type MaybeRefOrGetter, | ||
| } from "vue"; | ||
|
|
||
| import { isClient } from "@/utils/ssr"; | ||
| import { defineClasses, getActiveClasses } from "./defineClasses"; | ||
|
|
||
| /** | ||
| * Prevent the background from scrolling if toggled. | ||
| * Adds `clippled` or `noscroll` class to the body. | ||
| * `clip` removes the body scrollbar. | ||
| * `keep` makes a non scrollable scrollbar to avoid shifting background, but will set body to position fixed, might break some layouts. | ||
| * @param noScroll keep scrollbar or not | ||
| */ | ||
| export function usePreventScrolling( | ||
| noScroll: MaybeRefOrGetter<boolean> = false, | ||
| ): (active: boolean) => void { | ||
| const withScrollClasses = defineClasses(["scrollClipClass", "o-clipped"]); | ||
| const noScrollClasses = defineClasses(["noScrollClass", "o-noscroll"]); | ||
|
|
||
| const scrollClass = computed(() => | ||
| getActiveClasses( | ||
| toValue(noScroll) ? noScrollClasses.value : withScrollClasses.value, | ||
| ), | ||
| ); | ||
|
|
||
| const savedScrollTop = ref(null); | ||
|
|
||
| // reset scroll | ||
| onBeforeUnmount(() => toggleScroll(false)); | ||
|
|
||
| function toggleScroll(active: boolean): void { | ||
| if (!isClient) return; | ||
| if (!scrollClass.value) return; | ||
|
|
||
| savedScrollTop.value = savedScrollTop.value | ||
| ? savedScrollTop.value | ||
| : document.documentElement.scrollTop; | ||
|
|
||
| if (active) document.body.classList.add(...scrollClass.value); | ||
| else document.body.classList.remove(...scrollClass.value); | ||
|
|
||
| if (toValue(noScroll)) { | ||
| if (active) { | ||
| document.body.style.top = `-${savedScrollTop.value}px`; | ||
| } else { | ||
| document.documentElement.scrollTop = savedScrollTop.value; | ||
| document.body.style.top = null; | ||
| savedScrollTop.value = null; | ||
| } | ||
| } | ||
| } | ||
|
|
||
| return toggleScroll; | ||
| } |