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Open file in Typescript without <input type=file>
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| async function openFile( | |
| accept: string | null, // file type (see https://developer.mozilla.org/en-US/docs/Web/HTML/Attributes/accept) | |
| multiple: boolean = false, | |
| capture?: string | null // see https://developer.mozilla.org/en-US/docs/Web/HTML/Attributes/capture | |
| ): Promise<FileList | null> { | |
| return new Promise<FileList | null>((ok) => { | |
| const filePickerRef = document.createElement('input') | |
| filePickerRef.type = 'file' | |
| if (accept != null) filePickerRef.accept = accept | |
| if (capture != null) filePickerRef.capture = capture | |
| filePickerRef.multiple = multiple | |
| filePickerRef.click() | |
| filePickerRef.onchange = () => { | |
| ok(filePickerRef.files) | |
| filePickerRef.remove() | |
| } | |
| filePickerRef.oncancel = () => { | |
| ok(null) | |
| filePickerRef.remove() | |
| } | |
| }) | |
| } | |
| // example to get image file (PNG, JPEG, GIF, SVG, etc) | |
| openFile('image/*', true).then(files => { | |
| if (files == null || files.length == 0) return; | |
| // TODO: do something with the files here | |
| }) |
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