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resources/assets/vendor/libs/bs-stepper/bs-stepper.js

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+import Stepper from 'bs-stepper/dist/js/bs-stepper';
+
+const bsStepper = document.querySelectorAll('.bs-stepper');
+
+// Adds crossed class
+bsStepper.forEach(el => {
+  el.addEventListener('show.bs-stepper', function (event) {
+    var index = event.detail.indexStep;
+    var numberOfSteps = el.querySelectorAll('.line').length;
+    var line = el.querySelectorAll('.step');
+
+    // The first for loop is for increasing the steps,
+    // the second is for turning them off when going back
+    // and the third with the if statement because the last line
+    // can't seem to turn off when I press the first item. ¯\_(ツ)_/¯
+
+    for (let i = 0; i < index; i++) {
+      line[i].classList.add('crossed');
+
+      for (let j = index; j < numberOfSteps; j++) {
+        line[j].classList.remove('crossed');
+      }
+    }
+    if (event.detail.to == 0) {
+      for (let k = index; k < numberOfSteps; k++) {
+        line[k].classList.remove('crossed');
+      }
+      line[0].classList.remove('crossed');
+    }
+  });
+});
+
+try {
+  window.Stepper = Stepper;
+} catch (e) {}
+
+export { Stepper };