javascript - how to set default value in dropdownlist based on another dropdown selected item -


i have basic html form,when page loads loads form initial values no data.

in single page have added 2 tab containers left side grid , right side html form

what ever records loaded in grid when double click on fill right side form.

my requirement based on 1 type dropdown selected value how can default value in product dropdown.

for eg : have column in left side grid type data fab..when doubleclick on row form filled selected value fab. when selected value in type dropdown fab need check null or empty values in product dropdown column , set default value.

the values in dropdownlist product is

null null sh_ty hg_iu null null

the values in dropdownlist type is

fab loi tyu swa

this code trying fill form

here column names 

var formfields = [  {column: 'producttypeid'}, {column: 'productcodeid'},],      var fillform = function (record) {                 (var in formfields) {                     if (formfields[i].column != null) {                         var currentvalue = record[formfields[i].column];                         var initvalue = record[formfields[i].column + "_init"];                         formfields[i].ref.set('value', (currentvalue == null) ? '' : currentvalue);  if (formfields[i].column == 'btdate') {                             formfields[i].ref.set('value', (currentvalue == null || currentvalue == '0') ? '0' : '1');                         }  tried check not working   if (formfields[i].column == 'producttypeid') {                        if(currentvalue == "fab" || currentvalue == "swa")                           {                  formfields[i].ref.set.column.productcodeid('value', (currentvalue == null || currentvalue == '' || currentvalue == currentvalue) ? 'a_cl_fa': currentvalue);                         }                      }

you need use property way selected dropdownlist value differ of null.


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