Function getElementKey

dash/deps/react@18.2.0.js:992–1006

* Generate a key string that identifies a element within a set. * * @param {*} element A element that could contain a manual key. * @param {number} index Index that is used if a manual key is not provided. * @return {string}

(element, index)

  function getElementKey(element, index) {
    // Do some typechecking here since we call this blindly. We want to ensure
    // that we don't block potential future ES APIs.
    if (typeof element === 'object' && element !== null && element.key != null) {
      // Explicit key
      {
        checkKeyStringCoercion(element.key);
      }

      return escape('' + element.key);
    } // Implicit key determined by the index in the set


    return index.toString(36);
  }

  function mapIntoArray(children, array, escapedPrefix, nameSoFar, callback) {
    var type = typeof children;