html ng-class和ng-if（ng-class可以包含一个对象，其中key和expression对作为对象，ng-if类似于if语句）

Posted 2021-05-11

<div ng-controller="mainController">
                <input type="text" ng-model="name" />
                <div class="alert" ng-class="{'alert-warning': name.length < character, 'alert-danger': name.length > character}" ng-if="name.length !== character">
                    Must be {{character}} characters.
                </div>
                <h1>Hello {{lowercaseHandle()}}!</h1>
                
            </div>