---------------------- The `onCancel` property is used in the context of mutations in Refine. It can be utilized when the `mutationMode` is set to `"undoable"`. It provides a function that can be used to cancel the ongoing mutation. By defining `onCancel`, undoable notification will not be shown automatically. This gives you the flexibility to handle the cancellation process in your own way, such as showing a custom notification or implementing any other desired behavior to allow users to cancel the mutation. Here is an example of how to use `onCancel` in a mutation: ```jsx import { useRef } from "react"; import { useDelete } from "@refinedev/core"; const MyComponent = () => { const { mutate } = useDelete(); const cancelRef = useRef<(() => void) | null>(null); const deleteItem = () => { mutate({ //... mutationMode: "undoable", onCancel: (cancelMutation) => { cancelRef.current = cancelMutation; }, }); }; const cancelDelete = () => { cancelRef.current?.(); }; return ( <> ); }; ``` In this example, `onCancel` is used to set a reference to the cancel function of the mutation. This reference is then used in the `cancelDelete` function to cancel the mutation when needed. You can find more information about `onCancel` in the Refine documentation for **useDelete** (), **useUpdateMany** (), **useUpdate** (), and **useDeleteMany** (). ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

onCancel

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