How to use Aura:Iteration index variable inside a placeholder?











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I have a component which has a list of teams over which the aura:iteration is looping.
I want to use the placeholder attribute of lightning:input as such:



<aura:iteration items="{!v.dToPart.teams}"  var="eachTeam" indexVar="index">
<div class="slds-col slds-size_4-of-12 " >
<lightning:input placeholder="{'Name of team '+ #index+1}" aura:id="dToPart" value="{!eachTeam.name}" required="true"/>
</div>
</aura:iteration>


But this gives the following result:



Merge expression of string with aura iteration index fails



This works perfectly fine, if i only include the index in the merge expression:



<aura:iteration items="{!v.dToPart.teams}"  var="eachTeam" indexVar="index">
<div class="slds-col slds-size_4-of-12 " >
<lightning:input placeholder="{'Name of team '+ #index+1}" aura:id="dToPart" value="{!eachTeam.name}" required="true"/>
</div>
</aura:iteration>


Works when merge expression only has index



Can someone please help me out?










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    up vote
    1
    down vote

    favorite












    I have a component which has a list of teams over which the aura:iteration is looping.
    I want to use the placeholder attribute of lightning:input as such:



    <aura:iteration items="{!v.dToPart.teams}"  var="eachTeam" indexVar="index">
    <div class="slds-col slds-size_4-of-12 " >
    <lightning:input placeholder="{'Name of team '+ #index+1}" aura:id="dToPart" value="{!eachTeam.name}" required="true"/>
    </div>
    </aura:iteration>


    But this gives the following result:



    Merge expression of string with aura iteration index fails



    This works perfectly fine, if i only include the index in the merge expression:



    <aura:iteration items="{!v.dToPart.teams}"  var="eachTeam" indexVar="index">
    <div class="slds-col slds-size_4-of-12 " >
    <lightning:input placeholder="{'Name of team '+ #index+1}" aura:id="dToPart" value="{!eachTeam.name}" required="true"/>
    </div>
    </aura:iteration>


    Works when merge expression only has index



    Can someone please help me out?










    share|improve this question
























      up vote
      1
      down vote

      favorite









      up vote
      1
      down vote

      favorite











      I have a component which has a list of teams over which the aura:iteration is looping.
      I want to use the placeholder attribute of lightning:input as such:



      <aura:iteration items="{!v.dToPart.teams}"  var="eachTeam" indexVar="index">
      <div class="slds-col slds-size_4-of-12 " >
      <lightning:input placeholder="{'Name of team '+ #index+1}" aura:id="dToPart" value="{!eachTeam.name}" required="true"/>
      </div>
      </aura:iteration>


      But this gives the following result:



      Merge expression of string with aura iteration index fails



      This works perfectly fine, if i only include the index in the merge expression:



      <aura:iteration items="{!v.dToPart.teams}"  var="eachTeam" indexVar="index">
      <div class="slds-col slds-size_4-of-12 " >
      <lightning:input placeholder="{'Name of team '+ #index+1}" aura:id="dToPart" value="{!eachTeam.name}" required="true"/>
      </div>
      </aura:iteration>


      Works when merge expression only has index



      Can someone please help me out?










      share|improve this question













      I have a component which has a list of teams over which the aura:iteration is looping.
      I want to use the placeholder attribute of lightning:input as such:



      <aura:iteration items="{!v.dToPart.teams}"  var="eachTeam" indexVar="index">
      <div class="slds-col slds-size_4-of-12 " >
      <lightning:input placeholder="{'Name of team '+ #index+1}" aura:id="dToPart" value="{!eachTeam.name}" required="true"/>
      </div>
      </aura:iteration>


      But this gives the following result:



      Merge expression of string with aura iteration index fails



      This works perfectly fine, if i only include the index in the merge expression:



      <aura:iteration items="{!v.dToPart.teams}"  var="eachTeam" indexVar="index">
      <div class="slds-col slds-size_4-of-12 " >
      <lightning:input placeholder="{'Name of team '+ #index+1}" aura:id="dToPart" value="{!eachTeam.name}" required="true"/>
      </div>
      </aura:iteration>


      Works when merge expression only has index



      Can someone please help me out?







      lightning-components lightning






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      asked 1 hour ago









      Shridhar Puntambekar

      416




      416






















          1 Answer
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          Expressions need to start with # or ! to be recognized:



          <lightning:input placeholder="{#'Name of team '+ (index+1)}" ... />


          Note that the inner ( and ) are necessary to treat the index + 1 as arithmetic instead of string concatenation.



          An expression is always in the form of {, followed by # or !, followed by the expression to be evaluated, and finally ending in }.






          share|improve this answer





















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            up vote
            2
            down vote













            Expressions need to start with # or ! to be recognized:



            <lightning:input placeholder="{#'Name of team '+ (index+1)}" ... />


            Note that the inner ( and ) are necessary to treat the index + 1 as arithmetic instead of string concatenation.



            An expression is always in the form of {, followed by # or !, followed by the expression to be evaluated, and finally ending in }.






            share|improve this answer

























              up vote
              2
              down vote













              Expressions need to start with # or ! to be recognized:



              <lightning:input placeholder="{#'Name of team '+ (index+1)}" ... />


              Note that the inner ( and ) are necessary to treat the index + 1 as arithmetic instead of string concatenation.



              An expression is always in the form of {, followed by # or !, followed by the expression to be evaluated, and finally ending in }.






              share|improve this answer























                up vote
                2
                down vote










                up vote
                2
                down vote









                Expressions need to start with # or ! to be recognized:



                <lightning:input placeholder="{#'Name of team '+ (index+1)}" ... />


                Note that the inner ( and ) are necessary to treat the index + 1 as arithmetic instead of string concatenation.



                An expression is always in the form of {, followed by # or !, followed by the expression to be evaluated, and finally ending in }.






                share|improve this answer












                Expressions need to start with # or ! to be recognized:



                <lightning:input placeholder="{#'Name of team '+ (index+1)}" ... />


                Note that the inner ( and ) are necessary to treat the index + 1 as arithmetic instead of string concatenation.



                An expression is always in the form of {, followed by # or !, followed by the expression to be evaluated, and finally ending in }.







                share|improve this answer












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                share|improve this answer










                answered 1 hour ago









                sfdcfox

                243k10185413




                243k10185413






























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