add csp

app/javascript/elements/set_value.js

@@ -0,0 +1,11 @@
+export default class extends HTMLElement {
+  connectedCallback () {
+    const input = this.dataset.inputId ? document.getElementById(this.dataset.inputId) : this.querySelector('input')
+
+    this.firstElementChild.addEventListener(this.dataset.on || 'click', () => {
+      if (this.dataset.emptyOnly !== 'true' || !input.value) {
+        input.value = this.dataset.value
+      }
+    })
+  }
+}