Function hasHandler

static/js/codemirror/codemirror.js:4902–4905

(emitter, type)

  }

  function hasHandler(emitter, type) {
    var arr = emitter._handlers && emitter._handlers[type];
    return arr && arr.length > 0;
  }

  CodeMirror.on = on; CodeMirror.off = off; CodeMirror.signal = signal;