javascript - FormBuilder Angular 4中的禁用按钮

Question

我在 Angular 4 中使用 FormBuilder，当没有填写所有字段时，我需要禁用提交按钮。

component.ts

public loginForm = this.fb.group({
email: ['', Validators.required],
password: ['', Validators.required],});

constructor(
public fb: FormBuilder
) {  }

component.html

<form [formGroup]="loginForm" (ngSubmit)="doLogin($event)">
    <input formControlName="email" type="email" placeholder="Your email">
    <input formControlName="password" type="password" placeholder="Your password">
    <button type="submit">Log in</button>
</form>

现在按钮是事件的，那是不对的

Answer 1

使用 disabled 属性检查表单验证状态

<form [formGroup]="loginForm" (ngSubmit)="doLogin($event)">
    <input formControlName="email" type="email" placeholder="Your email">
    <input formControlName="password" type="password" placeholder="Your password">
    <button type="submit" [disabled]="!loginForm.valid">Log in</button>
</form>