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I have two lightning:button and a lightning:input field. What I have seen in some places is that. Some buttons are enabled only when values are entered in the text boxes. Is this achievable in lightning

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We use the disabled attribute of the ui:button || lightning:button components. Here is an example.

<aura:component>

  <aura:attribute name="username" type="String" default="" />


  <ui:inputText required="true" value="{!v.username}" label="Username" updateOn="keyup" />
  <ui:button disabled="{!empty(v.username)}" class="slds-button_brand" label="Submit" />

</aura:component>

PS: I have used the ui:* components here you can use the lightning:* components.

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