@mui/base/utils/combineHooksSlotProps.js

A library of headless ('unstyled') React UI components and low-level hooks.

import _extends from "@babel/runtime/helpers/esm/extends";
/**
 * Combines the two get*Props functions from Base UI hooks into one.
 * Useful when a hook uses two other hooks behind the scenes
 * (such as useSelect that depends on useList and useButton for its root slot).
 *
 * The resulting function will return the combined props.
 * They are merged from left to right, similarly to how Object.assign works.
 *
 * The getSecondProps function will receive the result of the getFirstProps function as its argument,
 * so its event handlers can call the previous handlers and act depending on its result.
 *
 * @param getFirstProps - A getter function that returns the props for the first slot. It receives the external event handlers as its argument.
 * @param getSecondProps - A getter function that returns the props for the second slot. It receives the result of the getFirstProps function as its argument.
 */
export default function combineHooksSlotProps(getFirstProps, getSecondProps) {
  return external => {
    const firstResult = _extends({}, external, getFirstProps(external));
    const result = _extends({}, firstResult, getSecondProps(firstResult));
    return result;
  };
}