blogben/templates/article/_form.html.twig

<p>
    Etat de l'article : <span class="badge badge-{{ article.state }}">{{ article.state | trans }}</span>
</p>
<div data-controller="slugger" >
    {{ form_start(form) }}
        {{ form_row(form.title) }}

        {% set cacherFormulaire = article.slug and not article.slug is same as '' and form.children.slug.vars.errors|length == 0 %}
        <div data-slugger-target="ligneSlug" class="ligne-slug {{ cacherFormulaire ? '' : 'hidden' }}">
            <div><span>Permalien</span> {% if article.slug %}{{ url('app_view', {slug: article.slug}) }}{% endif %}</div>
            <button type="button" class="bouton-slug" data-slugger-target="bouton-show" data-action="click->slugger#show">Modifier</button>
        </div>
        <div id="formulaire-slug" data-slugger-target="formulaire" class="{{ cacherFormulaire ? 'hidden' : ''}}">
            {{ form_label(form.slug) }}
            {{ form_errors(form.slug) }}
            {{ form_widget(form.slug) }}
            <div class="div-bouton-slug"><button type="button" class="bouton-slug" data-slugger-target="bouton" data-action="click->slugger#open">Générer un slug</butt></div>
            {{ form_help(form.slug) }}
        </div>
        {{ form_row(form.tags ) }}
        {{ form_row(form.content) }}
        {{ form_row(form.publicationDate) }}
        {{ form_row(form.author) }}
        {{ form_row(form.publicationChoice) }}
        {{ form_rest(form)}}
        <button  class="btn btn-green">{{ button_label|default('Sauvegarder') }}</button>
    {{ form_end(form) }}
</div>