| 提交 | 用户 | age | ||
| 2f6253 | 1 | import { ref, Ref, isRef, watch } from '@vue/runtime-dom' |
| 陈 | 2 | |
| 3 | export default function useCssVar( | |
| 4 | prop: string, | |
| 5 | refEl?: Ref<HTMLElement | null> | |
| 6 | ) { | |
| 7 | const refVar = ref('') | |
| 8 | let el: HTMLElement = document.documentElement | |
| 9 | ||
| 10 | if (isRef(refEl)) { | |
| 11 | watch( | |
| 12 | refEl, | |
| 13 | () => { | |
| 14 | if (refEl.value) { | |
| 15 | el = refEl.value as HTMLElement | |
| 16 | refVar.value = getComputedStyle(el).getPropertyValue(prop) | |
| 17 | } | |
| 18 | }, | |
| 19 | { immediate: true } | |
| 20 | ) | |
| 21 | } else { | |
| 22 | refVar.value = getComputedStyle(el).getPropertyValue(prop) | |
| 23 | } | |
| 24 | ||
| 25 | watch( | |
| 26 | refVar, | |
| 27 | val => { | |
| 28 | el && el.style.setProperty(prop, val) | |
| 29 | }, | |
| 30 | { immediate: true } | |
| 31 | ) | |
| 32 | ||
| 33 | return refVar | |
| 34 | } | |
