1.2.6 (#15)

* streamline auto duration handling and raf watcher calls

* update readme

* bump deps, release 1.2.6

update readme shields

Author: smastrom

README.md

@@ -1,5 +1,4 @@
-![npm](https://img.shields.io/npm/v/vue-collapsed?color=46c119) ![GitHub Workflow Status](https://img.shields.io/github/actions/workflow/status/smastrom/vue-collapsed/tests.yml?branch=main&label=tests) ![npm bundle size](https://img.shields.io/bundlephobia/minzip/vue-collapsed?color=success)
-![dependency-count](https://img.shields.io/badge/dependency%20count-0-success)
+![npm](https://img.shields.io/npm/v/vue-collapsed?color=46c119) ![dependencies](https://img.shields.io/badge/dependencies-0-success) ![npm bundle size](https://img.shields.io/bundlephobia/minzip/vue-collapsed?color=success) ![downloads](https://img.shields.io/npm/dm/vue-collapsed) ![GitHub Workflow Status](https://img.shields.io/github/actions/workflow/status/smastrom/vue-collapsed/tests.yml?branch=main&label=tests)
 
 # Vue Collapsed
 
@@ -126,6 +125,18 @@ To transition other properties use the attribute `data-collapse`:
 }
 ```
 
+Or to use different easings/durations for expand and collapse:
+
+```css
+.v-collapse[data-collapse='expanding'] {
+  transition: height 600ms ease-in-out;
+}
+
+.v-collapse[data-collapse='collapsing'] {
+  transition: height 300ms ease-out;
+}
+```
+
 Above values can also be accessed using `v-slot`:
 
 ```vue
@@ -188,33 +199,6 @@ function handleAccordion(selectedIndex) {
 </template>
 ```
 
-## Example - Callbacks
-
-```vue
-<script setup>
-// ...
-
-const sectionsRef = ref([])
-
-function scrollIntoView(index) {
-  sectionsRef.value[index].scrollIntoView({ behavior: 'smooth' })
-}
-</script>
-
-<template>
-  <div v-for="(question, index) in questions" :key="question.title" ref="sectionsRef">
-    <button @click="handleAccordion(index)">
-      {{ question.title }}
-    </button>
-    <Collapse :when="questions[index].isExpanded" @expanded="() => scrollIntoView(index)">
-      <p>
-        {{ question.answer }}
-      </p>
-    </Collapse>
-  </div>
-</template>
-```
-
 ## Accessibility
 
 `vue-collapsed` automatically detects if users prefer reduced motion and will disable transitions accordingly while keeping the same API behavior (emitting events and post-transition styles).
@@ -255,7 +239,7 @@ function handleCollapse() {
 </template>
 ```
 
-## Manually disable transitions
+## Manually disabling transitions
 
 ```vue
 <template>

demo/NestedCollapse.vue

@@ -7,7 +7,6 @@ const nested = reactive({
    first: true, // Initial value
    second: false,
    third: false,
-   fourth: false,
 })
 
 const innerText = `

package.json

@@ -1,6 +1,6 @@
 {
    "name": "vue-collapsed",
-   "version": "1.2.5",
+   "version": "1.2.6",
    "private": false,
    "description": "Dynamic CSS height transition from any to auto and vice versa for Vue 3. Accordion ready.",
    "keywords": [
@@ -28,6 +28,13 @@
    "main": "dist/index.js",
    "module": "dist/index.mjs",
    "types": "dist/index.d.ts",
+   "exports": {
+      ".": {
+         "import": "./dist/index.mjs",
+         "require": "./dist/index.js",
+         "types": "./dist/index.d.ts"
+      }
+   },
    "files": [
       "dist/*"
    ],
@@ -51,15 +58,15 @@
       "@rollup/plugin-terser": "^0.4.3",
       "@types/node": "^18.17.1",
       "@vitejs/plugin-vue": "^4.2.3",
-      "cypress": "^12.17.2",
+      "cypress": "^12.17.3",
       "cypress-wait-frames": "^0.9.4",
       "husky": "^8.0.3",
       "lint-staged": "^13.2.3",
       "playwright-webkit": "^1.36.2",
       "prettier": "^2.8.8",
       "rimraf": "^4.4.1",
       "typescript": "^4.9.5",
-      "vite": "^4.4.7",
+      "vite": "^4.4.8",
       "vite-plugin-dts": "^1.7.3",
       "vue": "^3.3.4",
       "vue-tsc": "^1.8.8"

src/Collapse.vue

@@ -18,10 +18,10 @@ import {
    type CSSProperties as CSS,
 } from 'vue'
 
-import { SAFE_STYLES as safeStyles, AUTO_DUR_VAR } from './constants'
+import { SAFE_STYLES as safeStyles, VISUALLY_HIDDEN, AUTO_DUR_VAR } from './constants'
 import { getTransition, getHeight, getAutoDuration, isReducedOrDisaled } from './utils'
 
-type TransitionState = 'expanding' | 'expanded' | 'collapsing' | 'collapsed'
+export type TransitionState = 'expanding' | 'expanded' | 'collapsing' | 'collapsed'
 
 const props = withDefaults(
    defineProps<{
@@ -61,19 +61,11 @@ const collapsedStyles = computed(() => ({
 const collapseRef = ref<HTMLElement | null>(null)
 
 const state = ref<TransitionState>(isExpanded.value ? 'expanded' : 'collapsed')
-const style = shallowRef<CSS>(isExpanded.value ? safeStyles : collapsedStyles.value)
+const style = shallowRef<CSS>({})
 
-const autoDuration = ref(0)
+const autoDuration = ref(300)
 const autoDurationVar = computed(() => ({ [AUTO_DUR_VAR]: `${autoDuration.value}ms` }))
 
-function setAutoDuration() {
-   if (!collapseRef.value) return
-
-   if (isExpanded.value || baseHeight.value > 0) {
-      autoDuration.value = getAutoDuration(collapseRef.value.scrollHeight - baseHeight.value)
-   }
-}
-
 function onExpanded() {
    style.value = safeStyles
    state.value = 'expanded'
@@ -88,7 +80,13 @@ function onCollapsed() {
 
 // Lifecycle / Watchers
 
-onMounted(setAutoDuration)
+onMounted(() => {
+   if (!collapseRef.value) return
+   if (!isExpanded.value && baseHeight.value === 0) style.value = VISUALLY_HIDDEN
+
+   autoDuration.value = getAutoDuration(collapseRef.value.scrollHeight - baseHeight.value)
+   style.value = isExpanded.value ? safeStyles : collapsedStyles.value
+})
 
 watch(isExpanded, (isExpanding) => {
    if (isExpanding) {
@@ -104,28 +102,23 @@ watch(isExpanded, (isExpanding) => {
        * We set the height to baseHeight as it is the 'current' height
        * we are transitioning from.
        */
+      state.value = 'expanding'
+      emit('expand')
+
       style.value = {
          ...safeStyles,
          ...baseHeightStyles.value,
+         ...autoDurationVar.value,
          willChange: 'height',
       }
 
       requestAnimationFrame(() => {
-         /** Get auto duration in once scrollHeight is available. */
-         setAutoDuration()
-         style.value = { ...style.value, ...autoDurationVar.value }
-
-         requestAnimationFrame(() => {
-            /** Set height to scrollHeight and trigger the transition. */
-            style.value = {
-               ...style.value,
-               ...getHeight(collapseRef.value),
-               ...getTransition(collapseRef.value),
-            }
-
-            state.value = 'expanding'
-            emit('expand')
-         })
+         /** Set height to scrollHeight and trigger the transition. */
+         style.value = {
+            ...style.value,
+            ...getHeight(collapseRef.value),
+            ...getTransition(collapseRef.value),
+         }
       })
    } else {
       if (isReducedOrDisaled(collapseRef.value)) return onCollapsed()
@@ -136,31 +129,24 @@ watch(isExpanded, (isExpanding) => {
        *
        * Since the element is visible we get the 'current'
        * expanded height (scrollHeight) and set it as height.
-       *
-       * We could use only one raf call, but we must use the
-       * same number of raf calls of the previous condition (2) to make
-       * sure accordion transitions (collapse/expand at the same time)
-       * are perfectly in sync.
        */
+      state.value = 'collapsing'
+      emit('collapse')
+
+      style.value = {
+         ...style.value,
+         ...autoDurationVar.value,
+         ...getHeight(collapseRef.value),
+         willChange: 'height',
+      }
+
       requestAnimationFrame(() => {
+         /** Set height to baseHeight and trigger the transition. */
          style.value = {
             ...style.value,
-            ...autoDurationVar.value,
-            ...getHeight(collapseRef.value),
-            willChange: 'height',
+            ...baseHeightStyles.value,
+            ...getTransition(collapseRef.value),
          }
-
-         requestAnimationFrame(() => {
-            /** Set height to baseHeight and trigger the transition. */
-            style.value = {
-               ...style.value,
-               ...baseHeightStyles.value,
-               ...getTransition(collapseRef.value),
-            }
-
-            state.value = 'collapsing'
-            emit('collapse')
-         })
       })
    }
 })
@@ -175,13 +161,14 @@ watch(baseHeight, (newBaseHeight) => {
           *
           * Below styles are going to be replaced on next expand.
           */
-         transitionDuration: '0s',
-         height: `${newBaseHeight}px`,
+         ...(newBaseHeight === 0
+            ? { display: 'none' }
+            : { transition: 'none', height: `${newBaseHeight}px` }),
       }
    }
 })
 
-// Callbacks
+// Event handlers
 
 function onTransitionEnd(event: TransitionEvent) {
    if (event.target === collapseRef.value && event.propertyName === 'height') {

src/constants.ts

@@ -2,4 +2,16 @@ export const AUTO_DUR_VAR = '--vc-auto-duration'
 
 export const DEFAULT_TRANSITION = `height var(${AUTO_DUR_VAR}) cubic-bezier(0.33, 1, 0.68, 1)`
 
-export const SAFE_STYLES = { padding: 0, border: 0, margin: 0 } as const
+export const SAFE_STYLES = { padding: 0 } as const
+
+export const VISUALLY_HIDDEN = {
+   position: 'absolute',
+   width: '1px',
+   height: '1px',
+   padding: '0',
+   margin: '-1px',
+   overflow: 'hidden',
+   clip: 'rect(0, 0, 0, 0)',
+   whiteSpace: 'nowrap',
+   border: '0',
+} as const