可以通過這兩個(gè)input的value來做判斷啊，如果兩個(gè)value都非空，就讓button的disabled屬性為false，否則為true

<input [(ngModel)]="name" (ngModelChange)="onchange()"/>
<input [(ngModel)]="pwd" (ngModelChange)="onchange()"/>
<button [disable]="isDisable" (click)="onLogin()">登錄</button>

isDisable=true;
name='';
pwd='';
onchange(){
    if(name.length>0&&pwd.length>0){
        this.isDisable=false;
    }else{
        this.isDisable=true;
    }
}

自己寫CSS來控制Button是否可用時(shí)的樣式