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fix(Uploader): preview is slow when sum of images size be bigger (#9961)

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chenjiangui 2021-11-30 17:43:57 +08:00 committed by GitHub
parent fa3444f1c5
commit bd236e9561
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1 changed files with 13 additions and 1 deletions
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14
packages/vant/src/uploader/Uploader.tsx
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@ -4,6 +4,7 @@ import {
PropType, PropType,
defineComponent, defineComponent,
ExtractPropTypes, ExtractPropTypes,
onBeforeUnmount,
} from 'vue'; } from 'vue';
// Utils // Utils
@ -97,6 +98,7 @@ export default defineComponent({
setup(props, { emit, slots }) { setup(props, { emit, slots }) {
const inputRef = ref(); const inputRef = ref();
const urls: string[] = [];
const getDetail = (index = props.modelValue.length) => ({ const getDetail = (index = props.modelValue.length) => ({
name: props.name, name: props.name,
@ -225,7 +227,13 @@ export default defineComponent({
if (props.previewFullImage) { if (props.previewFullImage) {
const imageFiles = props.modelValue.filter(isImageFile); const imageFiles = props.modelValue.filter(isImageFile);
const images = imageFiles const images = imageFiles
.map((item) => item.content || item.url) .map((item) => {
if (item.file && !item.url) {
item.url = URL.createObjectURL(item.file);
urls.push(item.url);
}
return item.url;
})
.filter(Boolean) as string[]; .filter(Boolean) as string[];
imagePreview = ImagePreview( imagePreview = ImagePreview(
@ -338,6 +346,10 @@ export default defineComponent({
} }
}; };
onBeforeUnmount(() => {
urls.forEach((url) => URL.revokeObjectURL(url));
});
useExpose<UploaderExpose>({ useExpose<UploaderExpose>({
chooseFile, chooseFile,
closeImagePreview, closeImagePreview,