Angular ng-container equivalent in vue.js
You could use conditional grouping on a template as mentioned in the docs here. The template will serve as an invisible wrapper.
<div class="flex-div"><template v-if="true"> <img src="cool-img" alt="awesome"> <h1>Cool Title</h1> <p>Cool Text</p></template><template v-if="false"> <img src="not-so-cool-img" alt="awesome"> <h1>Not So Cool Title</h1> <p>Not So Cool Text</p></template></div>