How to display time ago when specific table columns updated? - reactjs

Question

I want to show the time ago when the latitude and longitude last updated in my table.
My code currently shows the time ago of last update (through web
socket). It doesn't show the time ago that the latitude or longitude specifically were updated. How can I solve this? Here is a screen-shot of the table, and the code is below:
componentDidMount() {
let socket = new WebSocket('ws://139.162.2.53:9988');
this.setState({ socket: socket });
this.getSupportInfo();
socket.onmessage = ((message) => {
let socketData = JSON.parse(message.data);
//console.log(socketData[0] );
let device_id = socketData[0].device_id;
let updatedSupportInfo = this.state.supportInfo;
let now = new Date();
let uSupport = updatedSupportInfo.map(function(item){
if(device_id == item.device_id){
// console.log(item);
item.current_pos = socketData[0].current_pos;
item["latlng"] = item.current_pos.x + ',' + item.current_pos.y;
let time = new Date(socketData[0].timestamp)
let a = moment(time);
let b = moment(now);
//let timeAgo = a.from(b);
let timeAgo = b.diff(a, 'minutes')
//console.log("a", a);
//console.log("b", b);
//console.log("timeAgo", timeAgo);
item["timeAgo"] = timeAgo;
}
return item;
});
this.setState({supportInfo:uSupport})
});
}
I am using react bootstrap table:
<TableHeaderColumn dataField="timeAgo" dataSort={true}>Time Ago(mins)</TableHeaderColumn>