React 15 Warning: Unknown prop `placeholderChar` on <input> tag. about react-maskedinput HOT 5 CLOSED

  render: function render() {
    var _this = this;

    var _props = this.props;
    var mask = _props.mask;
    var formatCharacters = _props.formatCharacters;
    var size = _props.size;
    var placeholder = _props.placeholder;

    var props = _objectWithoutProperties(_props, ['mask', 'formatCharacters', 'size', 'placeholder']);

    var patternLength = this.mask.pattern.length;
    return React.createElement('input', _extends({}, props, {
      ref: function (r) {
        return _this.input = r;
      },
      maxLength: patternLength,
      onChange: this._onChange,
      onKeyDown: this._onKeyDown,
      onKeyPress: this._onKeyPress,
      onPaste: this._onPaste,
      placeholder: placeholder || this.mask.emptyValue,
      size: size || patternLength,
      value: this._getDisplayValue()
    }));
  }