add csp

app/javascript/elements/remove_on_event.js

@@ -0,0 +1,15 @@
+export default class extends HTMLElement {
+  connectedCallback () {
+    const eventType = this.dataset.on || 'click'
+    const selector = document.getElementById(this.dataset.selectorId) || this
+    const eventElement = eventType === 'submit' ? this.querySelector('form') : this
+
+    eventElement.addEventListener(eventType, (event) => {
+      if (eventType === 'click') {
+        event.preventDefault()
+      }
+
+      selector.remove()
+    })
+  }
+}