Function acquireSingletonInstance

docs/index.js:38058–38088

(
      type,
      props,
      instance,
      internalInstanceHandle
    )

      }
    }
    function acquireSingletonInstance(
      type,
      props,
      instance,
      internalInstanceHandle
    ) {
      if (getInstanceFromNode(instance)) {
        var tagName = instance.tagName.toLowerCase();
        console.error(
          "You are mounting a new %s component when a previous one has not first unmounted. It is an error to render more than one %s component at a time and attributes and children of these components will likely fail in unpredictable ways. Please only render a single instance of <%s> and if you need to mount a new one, ensure any previous ones have unmounted first.",
          tagName,
          tagName,
          tagName
        );
      }
      switch (type) {
        case "html":
        case "head":
        case "body":
          break;
        default:
          console.error(
            "acquireSingletonInstance was called with an element type that is not supported. This is a bug in React."
          );
      }
      for (tagName = instance.attributes; tagName.length; )
        instance.removeAttributeNode(tagName[0]);
      setInitialProperties(instance, type, props);
      instance[internalInstanceKey] = internalInstanceHandle;
      instance[internalPropsKey] = props;
    }
    function getHoistableRoot(container) {
      return "function" === typeof container.getRootNode
        ? container.getRootNode()