网站如何做导航条,企业策划书范文,wordpress 4 导航菜单,乱码链接怎么用if (typeof myVar undefined) {// myVar (未定义) 或 (已定义但未初始化)
} else {// myVar (已定义和已初始化)
}
参考
https://www.cnblogs.com/redFeather/p/17662966.htmlif (typeof myVar undefined) {// myVar (未定义) 或 (已定义但未初始化)
} else {// myVar (已定义和已初始化)
}
参考
https://www.cnblogs.com/redFeather/p/17662966.html
