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Allow dropzone to preview images before being uploaded

This commit is contained in:
Andrew Kingston 2021-05-18 18:47:39 +01:00
parent e76f68cee3
commit 6a92e7304b
1 changed files with 35 additions and 12 deletions
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47
packages/bbui/src/Form/Core/Dropzone.svelte
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@ -37,9 +37,28 @@
const fieldId = id || generateID()
let selectedImageIdx = 0
let fileDragged = false
let selectedUrl
$: selectedImage = value?.[selectedImageIdx] ?? null
$: fileCount = value?.length ?? 0
$: isImage = imageExtensions.includes(selectedImage?.extension?.toLowerCase())
$: isImage =
imageExtensions.includes(selectedImage?.extension?.toLowerCase()) ||
selectedImage?.type?.startsWith("image")
$: {
if (selectedImage?.url) {
selectedUrl = selectedImage?.url
} else if (selectedImage) {
try {
let reader = new FileReader()
reader.readAsDataURL(selectedImage)
reader.onload = e => {
selectedUrl = e.target.result
}
} catch (error) {
selectedUrl = null
}
}
}
async function processFileList(fileList) {
if (
@ -102,11 +121,13 @@
<div class="gallery">
<div class="title">
<div class="filename">{selectedImage.name}</div>
<div class="filesize">
{#if selectedImage.size <= BYTES_IN_MB}
{`${selectedImage.size / BYTES_IN_KB} KB`}
{:else}{`${selectedImage.size / BYTES_IN_MB} MB`}{/if}
</div>
{#if selectedImage.size}
<div class="filesize">
{#if selectedImage.size <= BYTES_IN_MB}
{`${selectedImage.size / BYTES_IN_KB} KB`}
{:else}{`${selectedImage.size / BYTES_IN_MB} MB`}{/if}
</div>
{/if}
{#if !disabled}
<div class="delete-button" on:click={removeFile}>
<Icon name="Close" />
@ -114,7 +135,7 @@
{/if}
</div>
{#if isImage}
<img alt="preview" src={selectedImage.url} />
<img alt="preview" src={selectedUrl} />
{:else}
<div class="placeholder">
<div class="extension">{selectedImage.extension}</div>
@ -142,11 +163,13 @@
<div class="gallery">
<div class="title">
<div class="filename">{file.name}</div>
<div class="filesize">
{#if file.size <= BYTES_IN_MB}
{`${file.size / BYTES_IN_KB} KB`}
{:else}{`${file.size / BYTES_IN_MB} MB`}{/if}
</div>
{#if file.size}
<div class="filesize">
{#if file.size <= BYTES_IN_MB}
{`${file.size / BYTES_IN_KB} KB`}
{:else}{`${file.size / BYTES_IN_MB} MB`}{/if}
</div>
{/if}
{#if !disabled}
<div class="delete-button" on:click={removeFile}>
<Icon name="Close" />