planning

node_modules/react-redux/es/connect/mergeProps.js

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+import _extends from "@babel/runtime/helpers/esm/extends";
+import verifyPlainObject from '../utils/verifyPlainObject';
+export function defaultMergeProps(stateProps, dispatchProps, ownProps) {
+  return _extends({}, ownProps, stateProps, dispatchProps);
+}
+export function wrapMergePropsFunc(mergeProps) {
+  return function initMergePropsProxy(dispatch, _ref) {
+    var displayName = _ref.displayName,
+        pure = _ref.pure,
+        areMergedPropsEqual = _ref.areMergedPropsEqual;
+    var hasRunOnce = false;
+    var mergedProps;
+    return function mergePropsProxy(stateProps, dispatchProps, ownProps) {
+      var nextMergedProps = mergeProps(stateProps, dispatchProps, ownProps);
+
+      if (hasRunOnce) {
+        if (!pure || !areMergedPropsEqual(nextMergedProps, mergedProps)) mergedProps = nextMergedProps;
+      } else {
+        hasRunOnce = true;
+        mergedProps = nextMergedProps;
+        if (process.env.NODE_ENV !== 'production') verifyPlainObject(mergedProps, displayName, 'mergeProps');
+      }
+
+      return mergedProps;
+    };
+  };
+}
+export function whenMergePropsIsFunction(mergeProps) {
+  return typeof mergeProps === 'function' ? wrapMergePropsFunc(mergeProps) : undefined;
+}
+export function whenMergePropsIsOmitted(mergeProps) {
+  return !mergeProps ? function () {
+    return defaultMergeProps;
+  } : undefined;
+}
+export default [whenMergePropsIsFunction, whenMergePropsIsOmitted];