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When the target element is not an <input type="file">, attachFile now falls back to dispatching synthetic drag-and-drop events (dragenter, dragover, drop) with a DataTransfer containing the file. This enables file uploads to dropzone libraries (Dropzone.js, react-dropzone, etc.). Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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Summary
attachFiletargets a non-file-input element (e.g. a dropzone<div>), it now falls back to dispatching syntheticdragenter→dragover→dropevents with aDataTransfercontaining the filegetMimeType()utility tolib/utils.jsfor resolving file extensions to MIME typesTest plan
attachFiletests pass for Playwright (2/2)attachFiletests pass for Puppeteer (2/2)🤖 Generated with Claude Code