# bit-form/2.9.1/includes/Admin/Form/ExtraFieldJS/CheckDisableOnMax.php

Bit Form – Contact Form, Payment Forms, Multi Step Forms, Calculator & Custom Form Builder, version 2.9.1. 43 lines.

- Page: https://pluginprobe.com/plugins/bit-form/2.9.1/code/includes/Admin/Form/ExtraFieldJS/CheckDisableOnMax.php
- Raw: https://pluginprobe.com/plugins/bit-form/2.9.1/raw/includes/Admin/Form/ExtraFieldJS/CheckDisableOnMax.php
- Modified: 2023-11-07T10:59:46+00:00

Line numbers below start at 1. Link to a line or a range by appending a fragment to the
page URL, for example `https://pluginprobe.com/plugins/bit-form/2.9.1/code/includes/Admin/Form/ExtraFieldJS/CheckDisableOnMax.php#L10-L20`.

```php
<?php

namespace BitCode\BitForm\Admin\Form\ExtraFieldJS;

class CheckDisableOnMax
{
  public static function init($fk, $field, $contentId)
  {
    return <<<FUNCTIONDEF
      function initCheckDisableOnMax(formContentId = null) {
        const contentIds = formContentId ? [formContentId] : Object.keys(bf_globals);
        contentIds.forEach(contentId => {
          const frm = bfSelect("#form-"+contentId);
          const {fields} = bf_globals[contentId];
          const checkFlds = Object.keys(fields).filter(fld => ['check', 'image-select'].includes(fields[fld].typ));
          checkFlds.forEach(fk => {
            frm.querySelectorAll("."+fk+"-inp-wrp input[type='checkbox']").forEach(function(el){
              el.addEventListener("change",function(e){
                  const max = Number(fields[fk].mx);
                  const checked = frm.querySelectorAll("."+fk+"-inp-wrp input[type='checkbox']:checked").length;
                  if(checked >= max){
                      frm.querySelectorAll("."+fk+"-inp-wrp input[type='checkbox']").forEach(function(el){
                      if(!el.checked){
                          el.setAttribute("disabled",true);
                      }
                      });
                  }else{
                      const options = fields[fk].opt;
                      frm.querySelectorAll("."+fk+"-inp-wrp input[type='checkbox']").forEach(function(el, index){
                        if(!options[index]?.disabled){
                          el.removeAttribute("disabled");
                        }
                      });
                  }
              });
            });
          })
        })
      }
FUNCTIONDEF;
  }
}

```