first commit

plugins/jquery-validation/polish/validator.min-checked.js

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+/* eslint-disable func-names */
+
+/* Min checked validator */
+/* Proper response for max <= 21 */
+let minChecked;
+function minCheckedMsg() {
+  minChecked = parseInt(minChecked, 10);
+  if (minChecked === 1) {
+    return `Proszę zaznaczyć przynajmniej ${minChecked} pole.`;
+  } else if (minChecked > 1 && minChecked < 5) {
+    return `Proszę zaznaczyć przynajmniej ${minChecked} pola.`;
+  }
+  return `Proszę zaznaczyć przynajmniej ${minChecked} pól.`;
+}
+
+jQuery.validator.addMethod(
+  "min_checked",
+  function(value, element) {
+    let min = 0;
+    const el = jQuery(element);
+    const form = jQuery(element).closest("form");
+    let name;
+    let count = 0;
+
+    const attr = el.attr("data-js-validation-min-checked");
+    if (typeof attr !== typeof undefined && attr !== false) {
+      min = attr;
+      minChecked = min;
+      name = el.attr("name");
+
+      count = jQuery(form).find(`input[name="${name}"]:checkbox:checked`)
+        .length;
+      if (count >= min) {
+        return this.optional(element) || true;
+      }
+      return this.optional(element) || false;
+    }
+    return this.optional(element) || true;
+  },
+  minCheckedMsg
+);
+
+/* Min checked validation */
+/* Need attr data-js-validation-min-checked */
+jQuery.validator.addClassRules("js-validation-min-checked", {
+  min_checked: true,
+});