Уточнение для field-num

src/blocks/field-num/field-num.js

@@ -5,23 +5,25 @@ const ready = require('../../js/utils/documentReady.js');
 ready(function(){
 
   var fields = document.querySelectorAll( '.field-num' );
-  Array.prototype.forEach.call( fields, function( field ) {
-    const input = field.querySelector('.field-num__input');
-    const valueMin = input.getAttribute('min') ? +input.getAttribute('min') : -Infinity;
-    const valueMax = input.getAttribute('max') ? +input.getAttribute('max') : Infinity;
-    const valueStep = input.getAttribute('step') ? +input.getAttribute('step') : 1;
-    field.addEventListener('click', function(event){
-      if(event.target.classList.contains('field-num__btn') && !input.getAttribute('disabled')) {
-        let num = parseInt(input.value);
-        if(isNaN(num)) num = 0;
-        if(event.target.classList.contains('field-num__btn--plus')) {
-          if (num < valueMax) input.value = num + valueStep;
+  if(fieldsNum.length) {
+    Array.prototype.forEach.call( fields, function( field ) {
+      const input = field.querySelector('.field-num__input');
+      const valueMin = input.getAttribute('min') ? +input.getAttribute('min') : -Infinity;
+      const valueMax = input.getAttribute('max') ? +input.getAttribute('max') : Infinity;
+      const valueStep = input.getAttribute('step') ? +input.getAttribute('step') : 1;
+      field.addEventListener('click', function(event){
+        if(event.target.classList.contains('field-num__btn') && !input.getAttribute('disabled')) {
+          let num = parseInt(input.value);
+          if(isNaN(num)) num = 0;
+          if(event.target.classList.contains('field-num__btn--plus')) {
+            if (num < valueMax) input.value = num + valueStep;
+          }
+          if(event.target.classList.contains('field-num__btn--minus')) {
+            if (num > valueMin) input.value = num - valueStep;
+          }
         }
-        if(event.target.classList.contains('field-num__btn--minus')) {
-          if (num > valueMin) input.value = num - valueStep;
-        }
-      }
+      });
     });
-  });
+  }
 
 });