JSFiddle - React, Tailwind, and code Playground

JavaScript

var dataChecking = "Hello Bob";
//Option 1 - Specifying what you're looking for in the function
//var positionName = dataChecking.indexOf("Bob");

//Option 2 - Using variables
var nameSearchingFor = "Bob";
var positionName = dataChecking.indexOf(nameSearchingFor);

if (positionName >= 0) {    
document.write(nameSearchingFor + " is located at " + positionName); 
}
else {
document.write(nameSearchingFor + " wasn't found!"); 
}