JSFiddle - React, Tailwind, and code Playground
HTML
<input type='button' value = 'close' onClick = CloseCurrentTab(); />
JavaScript
function CloseCurrentTab(){
var conf=confirm("Are you sure, you want to close this tab?");
if(conf==true){
console.log('maine agaya');
close();
}
else
{
console.log('maine else maine agaya');
}
}