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3 changes: 3 additions & 0 deletions .github/workflows/test.yml
Original file line number Diff line number Diff line change
Expand Up @@ -11,6 +11,9 @@ on:

workflow_dispatch:

permissions:
contents: read

jobs:
lint:
runs-on: ubuntu-latest
Expand Down
114 changes: 62 additions & 52 deletions packages/vant/src/lazyload/vue-lazyload/lazy-component.js
Original file line number Diff line number Diff line change
Expand Up @@ -3,66 +3,76 @@
* license at https://github.com/hilongjw/vue-lazyload/blob/master/LICENSE
*/

import { h } from 'vue';
import {
h,
ref,
reactive,
defineComponent,
getCurrentInstance,
onMounted,
onBeforeUnmount,
} from 'vue';
import { inBrowser, useRect } from '@vant/use';

export default (lazy) => ({
props: {
tag: {
type: String,
default: 'div',
export default (lazy) =>
defineComponent({
props: {
tag: {
type: String,
default: 'div',
},
},
},

emits: ['show'],

render() {
return h(
this.tag,
this.show && this.$slots.default ? this.$slots.default() : null,
);
},
emits: ['show'],

data() {
return {
el: null,
state: {
setup(props, { slots, emit }) {
const instance = getCurrentInstance();
const show = ref(false);
const state = reactive({
loaded: false,
},
show: false,
};
},
});

mounted() {
this.el = this.$el;
lazy.addLazyBox(this);
lazy.lazyLoadHandler();
},
const lazyBox = {
get el() {
return instance.proxy.$el;
},
get $el() {
return instance.proxy.$el;
},
get $parent() {
return instance.proxy.$parent;
},
state,
checkInView() {
const rect = useRect(instance.proxy.$el);
return (
inBrowser &&
rect.top < window.innerHeight * lazy.options.preLoad &&
rect.bottom > 0 &&
rect.left < window.innerWidth * lazy.options.preLoad &&
rect.right > 0
);
},
load() {
show.value = true;
state.loaded = true;
emit('show', instance.proxy);
},
destroy() {
return undefined;
},
};

beforeUnmount() {
lazy.removeComponent(this);
},
onMounted(() => {
lazy.addLazyBox(lazyBox);
lazy.lazyLoadHandler();
});

methods: {
checkInView() {
const rect = useRect(this.$el);
return (
inBrowser &&
rect.top < window.innerHeight * lazy.options.preLoad &&
rect.bottom > 0 &&
rect.left < window.innerWidth * lazy.options.preLoad &&
rect.right > 0
);
},

load() {
this.show = true;
this.state.loaded = true;
this.$emit('show', this);
},
onBeforeUnmount(() => {
lazy.removeComponent(lazyBox);
});

destroy() {
return this.$destroy;
return () =>
h(props.tag, show.value && slots.default ? slots.default() : null);
},
},
});
});
191 changes: 104 additions & 87 deletions packages/vant/src/lazyload/vue-lazyload/lazy-image.js
Original file line number Diff line number Diff line change
Expand Up @@ -6,105 +6,122 @@
import { useRect } from '@vant/use';
import { loadImageAsync } from './util';
import { noop } from '../../utils';
import { h } from 'vue';
import {
h,
ref,
reactive,
defineComponent,
getCurrentInstance,
onMounted,
onBeforeUnmount,
watch,
} from 'vue';

export default (lazyManager) => ({
props: {
src: [String, Object],
tag: {
type: String,
default: 'img',
},
},
render() {
return h(
this.tag,
{
src: this.renderSrc,
export default (lazyManager) =>
defineComponent({
props: {
src: [String, Object],
tag: {
type: String,
default: 'img',
},
this.$slots.default?.(),
);
},
data() {
return {
el: null,
options: {
},
setup(props, { slots }) {
const instance = getCurrentInstance();
const renderSrc = ref('');
const options = {
src: '',
error: '',
loading: '',
attempt: lazyManager.options.attempt,
},
state: {
};
const state = reactive({
loaded: false,
error: false,
attempt: 0,
},
renderSrc: '',
};
},
watch: {
src() {
this.init();
lazyManager.addLazyBox(this);
lazyManager.lazyLoadHandler();
},
},
created() {
this.init();
},
mounted() {
this.el = this.$el;
lazyManager.addLazyBox(this);
lazyManager.lazyLoadHandler();
},
beforeUnmount() {
lazyManager.removeComponent(this);
},
methods: {
init() {
const { src, loading, error } = lazyManager.valueFormatter(this.src);
this.state.loaded = false;
this.options.src = src;
this.options.error = error;
this.options.loading = loading;
this.renderSrc = this.options.loading;
},
checkInView() {
const rect = useRect(this.$el);
return (
rect.top < window.innerHeight * lazyManager.options.preLoad &&
rect.bottom > 0 &&
rect.left < window.innerWidth * lazyManager.options.preLoad &&
rect.right > 0
);
},
load(onFinish = noop) {
if (this.state.attempt > this.options.attempt - 1 && this.state.error) {
if (
process.env.NODE_ENV !== 'production' &&
!lazyManager.options.silent
) {
console.log(
`[@vant/lazyload] ${this.options.src} tried too more than ${this.options.attempt} times`,
);
}
});

onFinish();
return;
}
const { src } = this.options;
loadImageAsync(
{ src },
({ src }) => {
this.renderSrc = src;
this.state.loaded = true;
const init = () => {
const { src, loading, error } = lazyManager.valueFormatter(props.src);
state.loaded = false;
options.src = src;
options.error = error;
options.loading = loading;
renderSrc.value = options.loading;
};

const lazyBox = {
get el() {
return instance.proxy.$el;
},
get $el() {
return instance.proxy.$el;
},
get $parent() {
return instance.proxy.$parent;
},
state,
options,
checkInView() {
const rect = useRect(instance.proxy.$el);
return (
rect.top < window.innerHeight * lazyManager.options.preLoad &&
rect.bottom > 0 &&
rect.left < window.innerWidth * lazyManager.options.preLoad &&
rect.right > 0
);
},
load(onFinish = noop) {
if (state.attempt > options.attempt - 1 && state.error) {
if (
process.env.NODE_ENV !== 'production' &&
!lazyManager.options.silent
) {
console.log(
`[@vant/lazyload] ${options.src} tried too more than ${options.attempt} times`,
);
}
onFinish();
return;
}
const { src } = options;
loadImageAsync(
{ src },
({ src }) => {
renderSrc.value = src;
state.loaded = true;
},
() => {
state.attempt++;
renderSrc.value = options.error;
state.error = true;
},
);
},
};

init();

watch(
() => props.src,
() => {
this.state.attempt++;
this.renderSrc = this.options.error;
this.state.error = true;
init();
lazyManager.lazyLoadHandler();
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if (lazyManager.observer && lazyBox.el) {
lazyManager.observer.observe(lazyBox.el);
}
},
);

onMounted(() => {
lazyManager.addLazyBox(lazyBox);
lazyManager.lazyLoadHandler();
});

onBeforeUnmount(() => {
lazyManager.removeComponent(lazyBox);
});

return () => h(props.tag, { src: renderSrc.value }, slots.default?.());
},
},
});
});