vaultwarden/web-vault/app/settings/views/settingsPurge.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"><i class="fa fa-trash"></i> Purge Vault</h4>
</div>
<form name="form" ng-submit="form.$valid && submit(model)" api-form="submitPromise">
    <div class="modal-body">
        <p>
            Continue below to delete all items in your vault. Items that belong to an organization that you share
            with will not be deleted.
        </p>
        <div class="callout callout-warning">
            <h4><i class="fa fa-warning"></i> Warning</h4>
            Purging your vault is permanent. It cannot be undone.
        </div>
        <div class="callout callout-danger validation-errors" ng-show="form.$errors">
            <h4>Errors have occurred</h4>
            <ul>
                <li ng-repeat="e in form.$errors">{{e}}</li>
            </ul>
        </div>
        <div class="form-group" show-errors>
            <label for="masterPassword">Master Password</label>
            <input type="password" id="masterPassword" name="MasterPasswordHash" ng-model="model.masterPassword"
                   class="form-control" required api-field />
        </div>
    </div>
    <div class="modal-footer">
        <button type="submit" class="btn btn-primary btn-flat" ng-disabled="form.$loading">
            <i class="fa fa-refresh fa-spin loading-icon" ng-show="form.$loading"></i>Purge
        </button>
        <button type="button" class="btn btn-default btn-flat" ng-click="close()">Close</button>
    </div>
</form>