Angular4_readonly disabled hidden属性动态启用禁用

html中的

required hidden readonly disabled

这些属性，动态启用禁用

< div class= "form-group" [ hidden]= "model.isPersistent" > < label for= "idletimeout" >IdleTimeOut </ label > < input type= "text" class= "form-control" id= "idletimeout" [( ngModel)]= "model.idleTimeout" [ required]= "!model.isPersistent" name= "idleTimeout" value= '60' # idletimeout= "ngModel" > < div [ hidden]= "idletimeout.valid || idletimeout.pristine" class= "alert alert-danger" > IdleTimeOut is required </ div > </ div > < button type= "submit" class= "btn btn-success" [ disabled]= "!addEditWorkStationForm.form.valid" >Submit </ button >

就拿这段代码为例，原本的hidden加上[]就能实现了。

原理不多说，先会用再说啦