Developing a React.js single-page application that updates a website's content through modifications in a JSON file. This example will create a simple resume site that can be easily updated by changing the JSON data.

{ "name": "Alice Johnson", "title": "Software Developer", "contact": { "email": "alice.john@example.com", "phone": "123-456-7890" }, "summary": "Experienced software developer with a strong background in web development.", "experience": [ { "company": "Company A", "position": "Senior Developer", "duration": "2018 - Present", "description": "Worked on various projects, leading the development team." }, { "company": "Company B", "position": "Developer", "duration": "2015 - 2018", "description": "Developed multiple web applications and improved site performance." } ], "education": [ { "institution": "University X", "degree": "Bachelor of Science in Computer Science", "year": "2015" } ], "skills": [ "JavaScript", "React", "Node.js", "CSS" ] }