Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom

feat(H5): image 组件支持lazy-load属性 #4141

Open
wants to merge 2 commits into
base: next
Choose a base branch
from
+30 −2
Open

feat(H5): image 组件支持lazy-load属性 #4141

Changes from all commits
Commits
Show all changes
2 commits
Select commit Hold shift + click to select a range
d2483ae
feat(H5): `image` support `lazy-load` props
okxiaoliang4 Feb 9, 2023
63064a0
feat(H5): when unmount cleanup `image` observer.
okxiaoliang4 Feb 9, 2023
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Jump to
Jump to file
Failed to load files.
Diff view
Diff view
32 changes: 30 additions & 2 deletions packages/uni-components/src/vue/image/index.tsx
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -135,7 +135,32 @@ function useImageLoader(
state.origHeight = height
state.imgSrc = imgSrc
}
const loadImage = (src: string) => {

const observer = ref<IntersectionObserver>()
const cleanupObserver = () => {
if (observer.value) {
observer.value?.disconnect()
observer.value = undefined
}
}
const lazyLoadImage = (src: string) => {
resetImage()
setState()
if (!observer.value) {
observer.value = new IntersectionObserver(([{ isIntersecting }]) => {
if (isIntersecting) {
_loadImage(src)
cleanupObserver()
}
})
observer.value.observe(state.rootEl!)
}
}

const loadImage = (src: string) =>
props.lazyLoad ? lazyLoadImage(src) : _loadImage(src)

const _loadImage = (src: string) => {
if (!src) {
resetImage()
setState()
Expand Down Expand Up @@ -192,7 +217,10 @@ function useImageLoader(
}
)
onMounted(() => loadImage(state.src))
onBeforeUnmount(() => resetImage())
onBeforeUnmount(() => {
cleanupObserver()
resetImage()
})
}

const isChrome = __NODE_JS__ ? false : navigator.vendor === 'Google Inc.'
Expand Down