ecmascript 6 - ReactJS MaterialUI can I pass a parameter of an element into a function in another parameter? -

using reactjs + materialui formsy-material-ui.

for example if wanted pass in value of blah defaultselected value in radio button group.

<formsyradiogroup name="radio"     classname="radiobtns"     blah="blah blah"     defaultselected={somefunction(blah)} > 

thanks

if 'blah' static, why don't use defaultselected={somefunction("blah blah")} , if it's dynamically getting value, pass in state or variable 'blah' getting value, function. blah={this.state.blah} defaultselected={somefunction(this.state.blah)}