Function readContext

dash/deps/react-dom@18.3.1.js:14372–14408

(context)

    }
  }
  function readContext(context) {
    {
      // This warning would fire if you read context inside a Hook like useMemo.
      // Unlike the class check below, it's not enforced in production for perf.
      if (isDisallowedContextReadInDEV) {
        error('Context can only be read while React is rendering. ' + 'In classes, you can read it in the render method or getDerivedStateFromProps. ' + 'In function components, you can read it directly in the function body, but not ' + 'inside Hooks like useReducer() or useMemo().');
      }
    }

    var value =  context._currentValue ;

    if (lastFullyObservedContext === context) ; else {
      var contextItem = {
        context: context,
        memoizedValue: value,
        next: null
      };

      if (lastContextDependency === null) {
        if (currentlyRenderingFiber === null) {
          throw new Error('Context can only be read while React is rendering. ' + 'In classes, you can read it in the render method or getDerivedStateFromProps. ' + 'In function components, you can read it directly in the function body, but not ' + 'inside Hooks like useReducer() or useMemo().');
        } // This is the first dependency for this component. Create a new list.


        lastContextDependency = contextItem;
        currentlyRenderingFiber.dependencies = {
          lanes: NoLanes,
          firstContext: contextItem
        };
      } else {
        // Append a new context item.
        lastContextDependency = lastContextDependency.next = contextItem;
      }
    }

    return value;
  }

  // render. When this render exits, either because it finishes or because it is
  // interrupted, the interleaved updates will be transferred onto the main part