Move boolean and float parsing to shared utils

src/scripts/stringUtils.js

@@ -0,0 +1,27 @@
+/**
+ * Gets the value of a string as boolean.
+ * @param {string} name The value as a string.
+ * @param {boolean} defaultValue The default value if the string is invalid.
+ * @returns {boolean} The value.
+ */
+export function toBoolean(value, defaultValue = false) {
+    if (value !== 'true' && value !== 'false') {
+        return defaultValue;
+    } else {
+        return value !== 'false';
+    }
+}
+
+/**
+ * Gets the value of a string as float number.
+ * @param {string} value The value as a string.
+ * @param {number} defaultValue The default value if the string is invalid.
+ * @returns {number} The value.
+ */
+export function toFloat(value, defaultValue = 0) {
+    if (value === null || value === '' || isNaN(value)) {
+        return defaultValue;
+    } else {
+        return parseFloat(value);
+    }
+}