vaultwarden/web-vault/app/settings/views/settingsChangeEmail.html

<div class="modal-header">
    <button type="button" class="close" ng-click="close()" aria-label="Close"><span aria-hidden="true">&times;</span></button>
    <h4 class="modal-title" id="changeEmailModelLabel"><i class="fa fa-at"></i> Change Email</h4>
</div>
<form name="changeEmailForm" ng-submit="changeEmailForm.$valid && token(model, changeEmailForm)" api-form="tokenPromise"
      ng-show="!tokenSent">
    <div class="modal-body">
        <p>Below you can change your account's email address.</p>
        <div class="callout callout-danger validation-errors" ng-show="changeEmailForm.$errors">
            <h4>Errors have occurred</h4>
            <ul>
                <li ng-repeat="e in changeEmailForm.$errors">{{e}}</li>
            </ul>
        </div>
        <div class="form-group" show-errors>
            <label for="masterPassword">Master Password</label>
            <input type="password" id="masterPassword" name="MasterPasswordHash" ng-model="model.masterPassword" class="form-control"
                   required api-field />
        </div>
        <div class="form-group" show-errors>
            <label for="newEmail">New Email</label>
            <input type="email" id="newEmail" name="NewEmail" ng-model="model.newEmail" class="form-control" required api-field />
        </div>
    </div>
    <div class="modal-footer">
        <button type="submit" class="btn btn-primary btn-flat" ng-disabled="changeEmailForm.$loading">
            <i class="fa fa-refresh fa-spin loading-icon" ng-show="changeEmailForm.$loading"></i>Submit
        </button>
        <button type="button" class="btn btn-default btn-flat" ng-click="close()">Close</button>
    </div>
</form>
<form name="changeEmailConfirmForm" ng-submit="changeEmailConfirmForm.$valid && confirm(model)" api-form="confirmPromise"
      ng-show="tokenSent" autocomplete="off">
    <div class="modal-body">
        <p>We have emailed a verification code to <b>{{model.newEmail}}</b>. Please check your email for this code and enter it below to finalize your the email address change.</p>
        <div class="callout callout-warning">
            <h4><i class="fa fa-warning"></i> Warning</h4>
            Proceeding will log you out of your current session, requiring you to log back in. Active sessions on other devices
            may continue to remain active for up to one hour.
        </div>
        <div class="callout callout-danger validation-errors" ng-show="changeEmailConfirmForm.$errors">
            <h4>Errors have occurred</h4>
            <ul>
                <li ng-repeat="e in changeEmailConfirmForm.$errors">{{e}}</li>
            </ul>
        </div>
        <div class="form-group" show-errors>
            <label for="token">Code</label>
            <input type="number" id="token" name="Token" ng-model="model.token" class="form-control" required api-field />
        </div>
    </div>
    <div class="modal-footer">
        <button type="submit" class="btn btn-primary btn-flat" ng-disabled="changeEmailConfirmForm.$loading">
            <i class="fa fa-refresh fa-spin loading-icon" ng-show="changeEmailConfirmForm.$loading"></i>Change Email
        </button>
        <button type="button" class="btn btn-default btn-flat" ng-click="close()">Close</button>
    </div>
</form>