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anil Kumaranil Kumar 

How to show custom validation message for lightning Select

Hi All,

I am trying to display custom validation message for lightning Select tag based aura id but validation is not coming on lightning Select tag.

Component Code:

<aura:component >
    <lightning:select name="select1" label="How many tickets?" aura:Id="leadtimesel" messageWhenValueMissing="Please choose one">
        <option value="">choose one...</option>
        <option value="1">one</option>
        <option value="2">two</option>
        <option value="3">three</option>
    <lightning:button variant="brand" label="Brand" title="Brand action" onclick="{! c.handleClick }" />


JS Code:

    handleClick : function(component, event, helper){
      var firstNameField = component.find("leadtimesel");
        var value = firstNameField.get("v.value");
          if(value===''||value===null) {

Anil Kumar

VinayVinay (Salesforce Developers) 
Hi Anil,

Check below link that can help you.