30 lines
828 B
TypeScript
30 lines
828 B
TypeScript
//在需要的页面单独引入，不然会影响全局
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import { onMounted, onBeforeUnmount } from 'vue'
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export function useFlexibleRem() {
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let originFontSize = ''
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let resizeHandler: (() => void) | null = null
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const setRemBase = () => {
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const html = document.documentElement
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const width = window.innerWidth
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html.style.fontSize = (width / 1920) * 16 + 'px'
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}
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onMounted(() => {
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// 记录原始 font-size
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originFontSize = document.documentElement.style.fontSize
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setRemBase()
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resizeHandler = setRemBase
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window.addEventListener('resize', resizeHandler)
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})
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onBeforeUnmount(() => {
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// 离开页面时恢复原始 font-size
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document.documentElement.style.fontSize = originFontSize
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if (resizeHandler) {
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window.removeEventListener('resize', resizeHandler)
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}
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})
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}
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