Tag Helper Basics
The core-upload Tag Helper renders a complete upload component. Use asp-* attributes to configure behavior declaratively.
What you should see: the Tag Helper form of the control: attributes on one element instead of a JavaScript configuration block, rendering the same uploader.
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<core-upload asp-upload-url="/api/upload/upload"
asp-multiple="true"
asp-progress="true"
asp-drop-zone="true">
</core-upload>