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JSX code is not meant to be added directly to the head element. JSX is a syntax extension for JavaScript, which enables you to write HTML-like code that can be used to create user interfaces.
To use JSX code, you need to transpile it into regular JavaScript using a tool like Babel. The transpiled code can then be included in your JavaScript files or HTML files.
If you want to include some JavaScript code in the head element, you can use a script tag with a type attribute of "text/javascript". However, it's not recommended to include large blocks of JavaScript code in the head element as it can affect the page load time and performance. It's better to include your JavaScript code at the end of the body element or in an external JavaScript file.