Server : Apache/2.4.41 (Ubuntu) System : Linux absol.cf 5.4.0-198-generic #218-Ubuntu SMP Fri Sep 27 20:18:53 UTC 2024 x86_64 User : www-data ( 33) PHP Version : 7.4.33 Disable Function : pcntl_alarm,pcntl_fork,pcntl_waitpid,pcntl_wait,pcntl_wifexited,pcntl_wifstopped,pcntl_wifsignaled,pcntl_wifcontinued,pcntl_wexitstatus,pcntl_wtermsig,pcntl_wstopsig,pcntl_signal,pcntl_signal_get_handler,pcntl_signal_dispatch,pcntl_get_last_error,pcntl_strerror,pcntl_sigprocmask,pcntl_sigwaitinfo,pcntl_sigtimedwait,pcntl_exec,pcntl_getpriority,pcntl_setpriority,pcntl_async_signals,pcntl_unshare, Directory :  /usr/local/n/versions/node/14.15.4/lib/node_modules/npm/node_modules/semver-diff/

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'use strict';
var semver = require('semver');

module.exports = function (a, b) {
	if (semver.gt(a, b)) {
		return null;
	}

	a = semver.parse(a);
	b = semver.parse(b);

	for (var key in a) {
		if (key === 'major' || key === 'minor' || key === 'patch') {
			if (a[key] !== b[key]) {
				return key;
			}
		}

		if (key === 'prerelease' || key === 'build') {
			if (JSON.stringify(a[key]) !== JSON.stringify(b[key])) {
				return key;
			}
		}
	}

	return null;
};