How to show dropdown depending another dropdown in javascript?

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Hello,

I have two dropdown boxes. The first dropdown has 5 options you can choose from. Depending on the option you chose, the 2nd dropdown will populate other options. What I have been getting is that all the options are still showing in the 2nd dropdown no matter what I choose. What did I do wrong and hat did I miss?

My Keys for DropdownVar007 are A1 - A5

My Keys for LAAdropdownVar008 are ACA1 - ACA5 an SSO1 - SSO3

What I have tried:

JavaScript

$("#dropdownVar007").setOnchange(function(newVal,oldVal){
  console.log(newVal);
  if (newVal=="A1"){
    $("#LLAdropdownVar008").find("option[value=ACA1]").attr("disabled", false);
  
    $("#LLAdropdownVar008").find("option[value=ACA2]").attr("disabled", "disabled");
  
    $("#LLAdropdownVar008").find("option[value=ACA3]").attr("disabled", "disabled");
    
    $("#LLAdropdownVar008").find("option[value=ACA4]").attr("disabled", "disabled");
    
    $("#LLAdropdownVar008").find("option[value=ACA5]").attr("disabled", "disabled");
    
    $("#LLAdropdownVar008").find("option[value=SSO1]").attr("disabled", "disabled");
    
    $("#LLAdropdownVar008").find("option[value=SSO2]").attr("disabled", "disabled");
    
    $("#LLAdropdownVar008").find("option[value=SSO3]").attr("disabled", "disabled");
    
    $("#LLAdropdownVar008").find("option[value=DEV1]").attr("disabled", "disabled");
    
    $("#LLAdropdownVar008").find("option[value=DEV2]").attr("disabled", "disabled");
    
    $("#LLAdropdownVar008").find("option[value=DEV3]").attr("disabled", "disabled");
    
    $("#LLAdropdownVar008").find("option[value=FAM1]").attr("disabled", "disabled");
    
    $("#LLAdropdownVar008").find("option[value=FAM2]").attr("disabled", "disabled");
    
    $("#LLAdropdownVar008").find("option[value=FAM3]").attr("disabled", "disabled");
    
    $("#LLAdropdownVar008").find("option[value=PME1]").attr("disabled", "disabled");
    
    $("#LLAdropdownVar008").find("option[value=PME2]").attr("disabled", "disabled");
  
  }
  
  if (newVal=="A1"){
    $("#LLAdropdownVar008").find("option[value=A1]").attr("disabled", "disabled");
  
    $("#LLAdropdownVar008").find("option[value=A2]").attr("disabled", false);
  
    $("#LLAdropdownVar008").find("option[value=A3]").attr("disabled", "disabled");
    
    $("#LLAdropdownVar008").find("option[value=A4]").attr("disabled", "disabled");
    
    $("#LLAdropdownVar008").find("option[value=A5]").attr("disabled", "disabled");
    
    $("#LLAdropdownVar008").find("option[value=SSO1]").attr("disabled", "disabled");
    
    $("#LLAdropdownVar008").find("option[value=SSO2]").attr("disabled", "disabled");
    
    $("#LLAdropdownVar008").find("option[value=SSO3]").attr("disabled", "disabled");
    
    $("#LLAdropdownVar008").find("option[value=DEV1]").attr("disabled", "disabled");
    
    $("#LLAdropdownVar008").find("option[value=DEV2]").attr("disabled", "disabled");
    
    $("#LLAdropdownVar008").find("option[value=DEV3]").attr("disabled", "disabled");
    
    $("#LLAdropdownVar008").find("option[value=FAM1]").attr("disabled", "disabled");
    
    $("#LLAdropdownVar008").find("option[value=FAM2]").attr("disabled", "disabled");
    
    $("#LLAdropdownVar008").find("option[value=FAM3]").attr("disabled", "disabled");
    
    $("#LLAdropdownVar008").find("option[value=PME1]").attr("disabled", "disabled");
    
    $("#LLAdropdownVar008").find("option[value=PME2]").attr("disabled", "disabled");
  
  }
  
  if (newVal=="A1"){
    $("#LLAdropdownVar008").find("option[value=A1]").attr("disabled", "disabled");
  
    $("#LLAdropdownVar008").find("option[value=A2]").attr("disabled", "disabled");
  
    $("#LLAdropdownVar008").find("option[value=A3]").attr("disabled", false);
    
    $("#LLAdropdownVar008").find("option[value=A4]").attr("disabled", "disabled");
    
    $("#LLAdropdownVar008").find("option[value=A5]").attr("disabled", "disabled");
    
    $("#LLAdropdownVar008").find("option[value=SSO1]").attr("disabled", "disabled");
    
    $("#LLAdropdownVar008").find("option[value=SSO2]").attr("disabled", "disabled");
    
    $("#LLAdropdownVar008").find("option[value=SSO3]").attr("disabled", "disabled");
    
    $("#LLAdropdownVar008").find("option[value=DEV1]").attr("disabled", "disabled");
    
    $("#LLAdropdownVar008").find("option[value=DEV2]").attr("disabled", "disabled");
    
    $("#LLAdropdownVar008").find("option[value=DEV3]").attr("disabled", "disabled");
    
    $("#LLAdropdownVar008").find("option[value=FAM1]").attr("disabled", "disabled");
    
    $("#LLAdropdownVar008").find("option[value=FAM2]").attr("disabled", "disabled");
    
    $("#LLAdropdownVar008").find("option[value=FAM3]").attr("disabled", "disabled");
    
    $("#LLAdropdownVar008").find("option[value=PME1]").attr("disabled", "disabled");
    
    $("#LLAdropdownVar008").find("option[value=PME2]").attr("disabled", "disabled");
  
  }
  
  if (newVal=="A1"){
    $("#LLAdropdownVar008").find("option[value=A1]").attr("disabled", "disabled");
  
    $("#LLAdropdownVar008").find("option[value=A2]").attr("disabled", "disabled");
  
    $("#LLAdropdownVar008").find("option[value=A3]").attr("disabled", "disabled");
    
    $("#LLAdropdownVar008").find("option[value=A4]").attr("disabled", false);
    
    $("#LLAdropdownVar008").find("option[value=A5]").attr("disabled", "disabled");
    
    $("#LLAdropdownVar008").find("option[value=SSO1]").attr("disabled", "disabled");
    
    $("#LLAdropdownVar008").find("option[value=SSO2]").attr("disabled", "disabled");
    
    $("#LLAdropdownVar008").find("option[value=SSO3]").attr("disabled", "disabled");
    
    $("#LLAdropdownVar008").find("option[value=DEV1]").attr("disabled", "disabled");
    
    $("#LLAdropdownVar008").find("option[value=DEV2]").attr("disabled", "disabled");
    
    $("#LLAdropdownVar008").find("option[value=DEV3]").attr("disabled", "disabled");
    
    $("#LLAdropdownVar008").find("option[value=FAM1]").attr("disabled", "disabled");
    
    $("#LLAdropdownVar008").find("option[value=FAM2]").attr("disabled", "disabled");
    
    $("#LLAdropdownVar008").find("option[value=FAM3]").attr("disabled", "disabled");
    
    $("#LLAdropdownVar008").find("option[value=PME1]").attr("disabled", "disabled");
    
    $("#LLAdropdownVar008").find("option[value=PME2]").attr("disabled", "disabled");
    
  }
  
  if (newVal=="A1"){
    $("#LLAdropdownVar008").find("option[value=A1]").attr("disabled", "disabled");
  
    $("#LLAdropdownVar008").find("option[value=A2]").attr("disabled", "disabled");
  
    $("#LLAdropdownVar008").find("option[value=A3]").attr("disabled", "disabled");
    
    $("#LLAdropdownVar008").find("option[value=A4]").attr("disabled", "disabled");
    
    $("#LLAdropdownVar008").find("option[value=A5]").attr("disabled", false);
    
    $("#LLAdropdownVar008").find("option[value=SSO1]").attr("disabled", "disabled");
    
    $("#LLAdropdownVar008").find("option[value=SSO2]").attr("disabled", "disabled");
    
    $("#LLAdropdownVar008").find("option[value=SSO3]").attr("disabled", "disabled");
    
    $("#LLAdropdownVar008").find("option[value=DEV1]").attr("disabled", "disabled");
    
    $("#LLAdropdownVar008").find("option[value=DEV2]").attr("disabled", "disabled");
    
    $("#LLAdropdownVar008").find("option[value=DEV3]").attr("disabled", "disabled");
    
    $("#LLAdropdownVar008").find("option[value=FAM1]").attr("disabled", "disabled");
    
    $("#LLAdropdownVar008").find("option[value=FAM2]").attr("disabled", "disabled");
    
    $("#LLAdropdownVar008").find("option[value=FAM3]").attr("disabled", "disabled");
    
    $("#LLAdropdownVar008").find("option[value=PME1]").attr("disabled", "disabled");
    
    $("#LLAdropdownVar008").find("option[value=PME2]").attr("disabled", "disabled");
     
  }
})

Posted 16-Mar-21 10:35am

Computer Wiz99

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Comments

Richard Deeming 17-Mar-21 5:46am

You're disabling the options; you're not hiding them. They will still show, but you won't be able to select them.

Richard Deeming 17-Mar-21 5:47am

Also, you should be using prop to set the disabled property:

$("#LLAdropdownVar008").find("option[value=ACA1]").prop("disabled", false);
$("#LLAdropdownVar008").find("option[value=ACA2]").prop("disabled", true);

Computer Wiz99 17-Mar-21 10:37am

Thanks. How can I hide the other options and what is the difference in using attr vs prop?

Richard Deeming 17-Mar-21 10:41am

The jQuery documentation describes the difference between attr and prop:
.prop() | jQuery API Documentation[^]

To hide the elements, you could try setting their display to none:

$("#LLAdropdownVar008").find("option[value=ACA1]").prop("disabled", false).css("display", "initial");
$("#LLAdropdownVar008").find("option[value=ACA2]").prop("disabled", true).css("display", "none");

Computer Wiz99 17-Mar-21 11:08am

Thanks again.

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