&& 与 || 的用法 - Githubissues

IVYGOU / JavaScript

Learning Notes for JavaScript

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Open IVYGOU opened 7 years ago

IVYGOU commented 7 years ago

|| 用法
```
fnClass = fnClass || function() { };
```
含义是当 fnClass不为空时fnClass= fnClass，当fnClass为空时fnClass = function() { };