Function getToStringValue

docs/external/js/react-dom.development.js:1644–1657

(value)

    return '' + value;
  }
  function getToStringValue(value) {
    switch (typeof value) {
      case 'boolean':
      case 'number':
      case 'object':
      case 'string':
      case 'undefined':
        return value;

      default:
        // function, symbol are assigned as empty strings
        return '';
    }
  }

  /**
   * Copyright (c) 2013-present, Facebook, Inc.