vaultwarden-test/web-vault/app/accounts/views/accountsLoginTwoFactor.html

<div ng-if="twoFactorProvider === twoFactorProviderConstants.authenticator ||
     twoFactorProvider === twoFactorProviderConstants.email">
    <p class="login-box-msg" ng-if="twoFactorProvider === twoFactorProviderConstants.authenticator">
        Enter the 6 digit verification code from your authenticator app.
    </p>
    <div ng-if="twoFactorProvider === twoFactorProviderConstants.email" class="text-center">
        <p class="login-box-msg">
            Enter the 6 digit verification code that was emailed to <b>{{twoFactorEmail}}</b>.
        </p>
        <p>
            Didn't get the email?
            <a href="#" stop-click ng-click="sendEmail(true)" ng-if="twoFactorProvider === twoFactorProviderConstants.email">
                Send it again
            </a>
        </p>
    </div>
    <form name="twoFactorForm" ng-submit="twoFactorForm.$valid && twoFactor(token)" api-form="twoFactorPromise">
        <div class="callout callout-danger validation-errors" ng-show="twoFactorForm.$errors">
            <h4>Errors have occurred</h4>
            <ul>
                <li ng-repeat="e in twoFactorForm.$errors">{{e}}</li>
            </ul>
        </div>
        <div class="form-group has-feedback" show-errors>
            <label for="code" class="sr-only">Code</label>
            <input type="text" id="code" name="Code" class="form-control" placeholder="Verification code"
                   ng-model="token" required api-field autocomplete="off" autocorrect="off" autocapitalize="off"
                   spellcheck="false" />
            <span class="fa fa-lock form-control-feedback"></span>
        </div>
        <div class="row">
            <div class="col-xs-7">
                <div class="checkbox">
                    <label>
                        <input type="checkbox" id="rememberMe" ng-model="rememberTwoFactor.checked" /> Remember Me
                    </label>
                </div>
            </div>
            <div class="col-xs-5">
                <button type="submit" class="btn btn-primary btn-block btn-flat" ng-disabled="twoFactorForm.$loading">
                    <i class="fa fa-refresh fa-spin loading-icon" ng-show="twoFactorForm.$loading"></i>Log In
                </button>
            </div>
        </div>
    </form>
</div>

<div ng-if="twoFactorProvider === twoFactorProviderConstants.yubikey">
    <p class="login-box-msg">
        Complete logging in with YubiKey.
    </p>
    <form name="twoFactorForm" ng-submit="twoFactorForm.$valid && twoFactor(token)" api-form="twoFactorPromise"
          autocomplete="off">
        <div class="callout callout-danger validation-errors" ng-show="twoFactorForm.$errors">
            <h4>Errors have occurred</h4>
            <ul>
                <li ng-repeat="e in twoFactorForm.$errors">{{e}}</li>
            </ul>
        </div>
        <p>Insert your YubiKey into your computer's USB port, then touch its button.</p>
        <p>
            <img src="images/two-factor/yubikey.jpg" alt="" class="img-rounded img-responsive" />
        </p>
        <div class="form-group" show-errors>
            <label for="code" class="sr-only">Token</label>
            <input type="password" id="code" name="Token" class="form-control" ng-model="token"
                   autocomplete="new-password" required api-field />
        </div>
        <div class="row">
            <div class="col-xs-7">
                <div class="checkbox">
                    <label>
                        <input type="checkbox" id="rememberMe" ng-model="rememberTwoFactor.checked" /> Remember Me
                    </label>
                </div>
            </div>
            <div class="col-xs-5">
                <button type="submit" class="btn btn-primary btn-block btn-flat" ng-disabled="twoFactorForm.$loading">
                    <i class="fa fa-refresh fa-spin loading-icon" ng-show="twoFactorForm.$loading"></i>Log In
                </button>
            </div>
        </div>
    </form>
</div>

<div ng-if="twoFactorProvider === twoFactorProviderConstants.duo">
    <p class="login-box-msg">
        Complete logging in with Duo.
    </p>
    <form name="twoFactorForm" ng-submit="twoFactorForm.$valid && twoFactor(token)" api-form="twoFactorPromise"
          autocomplete="off">
        <div class="callout callout-danger validation-errors" ng-show="twoFactorForm.$errors">
            <h4>Errors have occurred</h4>
            <ul>
                <li ng-repeat="e in twoFactorForm.$errors">{{e}}</li>
            </ul>
        </div>
        <div id="duoFrameWrapper">
            <iframe id="duo_iframe"></iframe>
        </div>
        <div class="row">
            <div class="col-xs-7">
                <div class="checkbox">
                    <label>
                        <input type="checkbox" id="rememberMe" ng-model="rememberTwoFactor.checked" /> Remember Me
                    </label>
                </div>
            </div>
            <div class="col-xs-5">
                <span ng-show="twoFactorForm.$loading">
                    <i class="fa fa-refresh fa-spin loading-icon"></i> Logging in...
                </span>
            </div>
        </div>
    </form>
</div>

<div ng-if="twoFactorProvider === twoFactorProviderConstants.u2f">
    <p class="login-box-msg">
        Complete logging in with FIDO U2F.
    </p>
    <form name="twoFactorForm" api-form="twoFactorPromise" autocomplete="off">
        <div class="callout callout-danger validation-errors" ng-show="twoFactorForm.$errors">
            <h4>Errors have occurred</h4>
            <ul>
                <li ng-repeat="e in twoFactorForm.$errors">{{e}}</li>
            </ul>
        </div>
        <p>Insert your Security Key into your computer's USB port. If it has a button, touch it.</p>
        <p>
            <img src="images/two-factor/u2fkey.jpg" alt="" class="img-rounded img-responsive" />
        </p>
        <div class="row">
            <div class="col-xs-7">
                <div class="checkbox">
                    <label>
                        <input type="checkbox" id="rememberMe" ng-model="rememberTwoFactor.checked" /> Remember Me
                    </label>
                </div>
            </div>
            <div class="col-xs-5">
                <span ng-show="twoFactorForm.$loading">
                    <i class="fa fa-refresh fa-spin loading-icon"></i> Logging in...
                </span>
            </div>
        </div>
    </form>
</div>

<div ng-if="twoFactorProvider === null">
    <p>
        This account has two-step login enabled, however, none of the configured two-step providers are supported by this
        web browser.
    </p>
    Please use a supported web browser (such as Chrome) and/or add additional providers that are better supported
    across web browsers (such as an authenticator app).
</div>

<hr />
<ul>
    <li>
        <a stop-click href="#" ng-click="anotherMethod()">Use another two-step login method</a>
    </li>
    <li>
        <a ui-sref="frontend.login.info({returnState: returnState})">Back to log in</a>
    </li>
</ul>