优化浏览器判断代码

browser-compatibility.js

@@ -1,38 +1,47 @@
 let needUpdateBrowser = (()=>{
 	try {
-		return !Boolean(eval("undefined?.undefined?.undefined ?? true"));
+		return !Boolean(eval("undefined?.undefined ?? true"));
 	} catch (e) {
 		if (e.name !== 'SyntaxError') throw e // Throw the error if it is not a SyntaxError
 		return true;
 	}
-}
-)();
+})();
 
 if (needUpdateBrowser)
 {
 	let browserVersion = ((UA)=>{
 		let regRes;
-		if (regRes = /\b(Firefox|Chrome)\/([\d\.]+)/ig.exec(navigator.userAgent))
+		if (regRes = /\b(Firefox|Chrome)\/([\d\.]+)/ig.exec(UA))
 		{
 			return `${regRes[1]} ${regRes[2]}`;
-		}else if (regRes = /\bVersion\/([\d\.]+)\s+.*\b(Safari)\//ig.exec(navigator.userAgent))
+		}else if (regRes = /\bVersion\/([\d\.]+)\s+.*\b(Safari)\//ig.exec(UA))
 		{
 			return `${regRes[2]} ${regRes[1]}`;
 		}else
 		{
-			navigator.userAgent;
+			UA;
 		}
 	})(navigator.userAgent);
 
-let alertStr = `🙁浏览器内核版本太老 | Browser kernel is too old
-您的浏览器版本为 | Your browser is:
+let alertStr;
+if (/^zh-(?:han(?:s|t)-)?/.test(navigator.language)) {
+	alertStr = `🙁浏览器内核版本太老
+您的浏览器版本为:
 ${browserVersion}
 
 您的浏览器不支持本程序使用的 可选链操作符(?.) 和 空值合并操作符(??)。
+
+请更新您的浏览器到 Firefox(火狐) ≥ 74 或 Chrome(谷歌) ≥ 80 或 Safari(苹果) ≥ 13.1。`;
+} else {
+	alertStr = `🙁Browser kernel is too old
+Your browser is:
+${browserVersion}
+
 Your browser does not support Optional chaining (?.) and Nullish coalescing operator (??) used in this program.
 
-请更新您的浏览器到 Firefox(火狐) ≥ 74 或 Chrome(谷歌) ≥ 80 或 Safari(苹果) ≥ 13.1。
 Please update your browser to Firefox ≥ 74 or Chrome ≥ 80 or Safari ≥ 13.1.`;
+}
+
 alert(alertStr);
 document.write(alertStr.replace(/\n/g,'<br />'));
 }