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the first line of HTML code in that Fiddle link is: https://facebook.github.io/react/js/jsfiddle-integration-babel.js https://facebook.github.io/react/js/jsfidd

by joesb 10y ago

the first line of HTML code in that Fiddle link is: https://facebook.github.io/react/js/jsfiddle-integration-babel.js https://facebook.github.io/react/js/jsfiddle-integration-bab... What you are missing is that you probably don't want to develop by putting your code in JSFiddle.