I\'m using ReactJS.
I have a statefull component (stopwatch container) and multiple child components which are stateless (stopwatches).
In the outer component,
Instead of calling this.setState(this.state) you can just call this.forceUpdate().
this.setState(this.state)
Just remember that this is not recommended way of updating components state. If you are unsure about your modifications take a look on Immutability Helpers.