I'd also generalise the question beyond jsx to just 'inline with javascript' - ie just as you say, inject the svg markup into the DOM synchronously using the sa

I'd also generalise the question beyond jsx to just 'inline with javascript' - ie just as you say, inject the svg markup into the DOM synchronously using the same javascript that renders the DOM (rather than some deferred source) - it's just most of the time for me that means jsx.