JSFiddle - React, Tailwind, and code Playground

JavaScript

var req = {
	body: {
  	title: "test'title"
	}
}

for(var prop in req.body) {
  if (req.body.hasOwnProperty(prop))
  	req.body[prop] = req.body[prop].split("'").join("\\'");
}

console.log(req);