React js onClick can’t pass value to method

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I want to read the onClick event value properties. But when I click on it, I see something like this on the console: 

SyntheticMouseEvent {dispatchConfig: Object, dispatchMarker: ".1.1.0.2.0.0:1", nativeEvent: MouseEvent, type: "click", target

My code is working correctly. When I run I can see {column} but can’t get it in the onClick event.

My Code:

var HeaderRows = React.createClass({
  handleSort:  function(value) {
    console.log(value);
  },
  render: function () {
    var that = this;
    return(
      <tr>
        {this.props.defaultColumns.map(function (column) {
          return (
            <th value={column} onClick={that.handleSort} >{column}</th>
          );
        })}
        {this.props.externalColumns.map(function (column) {
          // Multi dimension array - 0 is column name
          var externalColumnName = column[0];
          return ( <th>{externalColumnName}</th>);
        })}
      </tr>
    );
  }
});

How can I pass a value to the onClick event in React js?

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