Jquery and dynamic content

Here’s my problem:
Dynamic content constructed with a repeat should be shortened in length by a jquery plugin (“collapser.js”). This plugin is initialized with a function (“collapse();”).
In Dreamweaver I added this initialization on repeat

> (<div class="sprach-block" id="repeat3" is="dmx-repeat" dmx-bind:repeat="serverconnect1.data.query1" onupdated="collapse();">...</div>)

This works. Even if I open the page in Wappler.
But if I rebuild the same in Wappler in a new page (with Bootstrap 4 instead of Bootstrp 3), it doesn’t work. (<div class="col-6" dmx-repeat:repeatimgespraech="serverconnect1.data.query1" onupdated="collapse();"> .... </div>).
What can I do?