* Query an element selector if it's not an element already.

@description: TODO :查询blog有关用户 @params: [blog] @return: void @author: SenGang

* Resolve an asset. * This function is used because child instances need access * to assets defined in its ancestor chain.

* Runtime helper for resolving raw children VNodes into a slot object.

* Convert an Array-like object to a real Array.

* Add class with compatibility for SVG since classList is not supported on * SVG elements in IE

* Cross-platform code generation for component v-model

* Normalize a transition hook's argument length. The hook may be: * - a merged hook (invoker) with the original in .fns * - a wrapped compon

是否是无效手机格式 @param phone 要校验的手机号 @return true:符合，false：不符合

* Check if a string starts with $ or _

* Check if val is a valid array index.