Function isUsingKoreanIME

docs/external/js/react-dom.development.js:8905–8907

* Check if a composition event was triggered by Korean IME. * Our fallback mode does not work well with IE's Korean IME, * so just use native composition events when Korean IME is used. * Although CompositionEvent.locale property is deprecated, * it is available in IE, where our fallback

(nativeEvent)

  function isUsingKoreanIME(nativeEvent) {
    return nativeEvent.locale === 'ko';
  } // Track the current IME composition status, if any.


  var isComposing = false;