Angular 4 表单必填字段提示CSS

.ng-valid[required].ng-dirty:not(form),

.ng-valid.required.ng-dirty:not(form){

border-left:5pxsolid#42A948;

}

.ng-valid[required].ng-pristine:not(form),serif;font-size:12px;white-space:normal;">.ng-valid.required.ng-pristine:not(form){

border-left:2pxsolid#EFC26E;

.ng-invalid[required].ng-pristine:not(form){

.ng-invalid.ng-dirty:not(form){

border-left:5pxsolid#a94442;

}