profiling.js
631422e9a504validity_dates

profiling.js
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			'use strict';

			function checkDCE() {
			/* global __REACT_DEVTOOLS_GLOBAL_HOOK__ */
			if (
			typeof __REACT_DEVTOOLS_GLOBAL_HOOK__ === 'undefined' \|\|
			typeof __REACT_DEVTOOLS_GLOBAL_HOOK__.checkDCE !== 'function'
			) {
			return;
			}
			if (process.env.NODE_ENV !== 'production') {
			// This branch is unreachable because this function is only called
			// in production, but the condition is true only in development.
			// Therefore if the branch is still here, dead code elimination wasn't
			// properly applied.
			// Don't change the message. React DevTools relies on it. Also make sure
			// this message doesn't occur elsewhere in this function, or it will cause
			// a false positive.
			throw new Error('^_^');
			}
			try {
			// Verify that the code above has been dead code eliminated (DCE'd).
			__REACT_DEVTOOLS_GLOBAL_HOOK__.checkDCE(checkDCE);
			} catch (err) {
			// DevTools shouldn't crash React, no matter what.
			// We should still report in case we break this code.
			console.error(err);
			}
			}

			if (process.env.NODE_ENV === 'production') {
			// DCE check should happen before ReactDOM bundle executes so that
			// DevTools can report bad minification during injection.
			checkDCE();
			module.exports = require('./cjs/react-dom.profiling.min.js');
			} else {
			module.exports = require('./cjs/react-dom.development.js');
			}