[0. 调试&兼容性&错误处理](1.%E8%B0%83%E8%AF%95.md) [3. 运算](3.%E7%AE%97%E6%9C%AF%E8%AE%A1%E7%AE%97.md) [4. 对象(三种引用类型&正则)](%E5%AF%B9%E8%B1%A1%E4%B8%89%E7%A7%8D%E5%BC%95%E7%94%A8%E7%B1%BB%E5%9E%8B%E6%AD%A3%E5%88%99.md) [5. 面向对象](7.%E9%9D%A2%E5%90%91%E5%AF%B9%E8%B1%A1.md) [6. 控制语句](5.ifelse.md) [7. ajax](6.ajax.md) [8. promise](8.promise.md) [9. 闭包](9.%E9%97%AD%E5%8C%851.md) [10.箭头函数](10.%E7%AE%AD%E5%A4%B4%E5%87%BD%E6%95%B0.md) [_isEmpty](_isEmpty.md) [Object.assign(target, obj, obj)](Object.assigntarget,obj,obj.md) [Math.ceil, round,](Math.ceil,round,.md)