Initial commit - existing project files

static/js/customNumberInput.js

@@ -0,0 +1,30 @@
+{
+
+    document.addEventListener("DOMContentLoaded", () => {
+        // get all customNumberInput Elements
+        let custom_number_inputs = document.getElementsByClassName("customNumberInput");
+        // Add Event Handler to the elements of the customNumberInputs
+        [...custom_number_inputs].forEach(element => {
+            // number input
+            let numberFieldElement = element.getElementsByClassName("customNumberInputField")[0];
+            // minus button
+            element.getElementsByClassName("customNumberInput-minus")[0].addEventListener("click", () => {
+                alterCustomNumberField(numberFieldElement, -1)
+            });
+            // plus button
+            element.getElementsByClassName("customNumberInput-plus")[0].addEventListener("click", () => {
+                alterCustomNumberField(numberFieldElement, +1)
+            });
+        })
+    })
+
+    function alterCustomNumberField(numberFieldElement, n) {
+        numberFieldElement.value = Math.min(
+            Math.max(
+                (parseInt(numberFieldElement.value) + n), numberFieldElement.min || Number.MIN_VALUE
+            ),
+            numberFieldElement.max || Number.MAX_VALUE
+        );
+    }
+
+}