🇨🇳 张云龙
寻找现实世界中的"bug"并用技术手段来解决，让世界变得更加规则，更加美好，这就是我的道。
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JavaScript语句末尾到底该不该加 分号 ?加或不加又有什么区别？比如性能，可读性？
我觉得，应该写。
这件事我在很多地方讲起过，写下来，方便以后再发给别人看。
曾经发生过一起这样的事件，有一段这样的代码：
var foo = function(str){
console.log(str);
}
(function(){
foo('123');
})()怎么想也想不明白，为什么这段js会报错，而且输出了一段不符合预期的内容，后来发现是因为第三行var语句结束那里少加了一个分号，导致整段代码实际上以这种方式执行：
var foo = function(str){
console.log(str);
}(function(){
foo('123');
});
foo();这个故事告诉我们，结尾不写分号可能会引起一些麻烦。。。
在知乎上看到了更加完整的答案，http://zhi.hu/EVhp ，讲的更生动
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