Why && lightning expression operator doesn't work?












3















According to this reference the syntax below:



<aura:if isTrue="{!and(v.isVisible,!empty(v.subjectsList))}">



should be equivalent to:



<aura:if isTrue="{!v.isVisible && !empty(v.subjectsList)}">



However, I receive the message below when I try to save the lightning component to the sandbox:



FIELD_INTEGRITY_EXCEPTION - c:SubjectSelectionView_GCC:69,34: ParseError at [row,col]:[70,34]
Message: The entity name must immediately follow the '&' in the entity reference.: Source


So, What am I missing?










share|improve this question



























    3















    According to this reference the syntax below:



    <aura:if isTrue="{!and(v.isVisible,!empty(v.subjectsList))}">



    should be equivalent to:



    <aura:if isTrue="{!v.isVisible && !empty(v.subjectsList)}">



    However, I receive the message below when I try to save the lightning component to the sandbox:



    FIELD_INTEGRITY_EXCEPTION - c:SubjectSelectionView_GCC:69,34: ParseError at [row,col]:[70,34]
    Message: The entity name must immediately follow the '&' in the entity reference.: Source


    So, What am I missing?










    share|improve this question

























      3












      3








      3








      According to this reference the syntax below:



      <aura:if isTrue="{!and(v.isVisible,!empty(v.subjectsList))}">



      should be equivalent to:



      <aura:if isTrue="{!v.isVisible && !empty(v.subjectsList)}">



      However, I receive the message below when I try to save the lightning component to the sandbox:



      FIELD_INTEGRITY_EXCEPTION - c:SubjectSelectionView_GCC:69,34: ParseError at [row,col]:[70,34]
      Message: The entity name must immediately follow the '&' in the entity reference.: Source


      So, What am I missing?










      share|improve this question














      According to this reference the syntax below:



      <aura:if isTrue="{!and(v.isVisible,!empty(v.subjectsList))}">



      should be equivalent to:



      <aura:if isTrue="{!v.isVisible && !empty(v.subjectsList)}">



      However, I receive the message below when I try to save the lightning component to the sandbox:



      FIELD_INTEGRITY_EXCEPTION - c:SubjectSelectionView_GCC:69,34: ParseError at [row,col]:[70,34]
      Message: The entity name must immediately follow the '&' in the entity reference.: Source


      So, What am I missing?







      lightning-aura-components






      share|improve this question













      share|improve this question











      share|improve this question




      share|improve this question










      asked 44 mins ago









      SauloSaulo

      91110




      91110






















          1 Answer
          1






          active

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          3














          Instead of && you can use &amp;&amp; (the HTML entity for &). That seems to satisfy the parser and the expression will still execute your logic correctly.



          So your code will be:



          <aura:if isTrue="{!v.isVisible &amp;&amp; !empty(v.subjectsList)}">






          share|improve this answer



















          • 3





            @JayantDas No, Lightning requires it. It is not specific to the Developer Console. Go ahead and try it out in your favorite IDE. ... It's technically an oversight in the documentation, as far as I can tell. Aura has always worked this way.

            – sfdcfox
            27 mins ago













          • AND function is more readable in case we have 2 parameters: <aura:if isTrue="{!and(v.isVisible, !empty(v.subjectsList))}">

            – Raul
            23 mins ago











          • @sfdcfox that's new to me. I recollect using at least || at places and thought && would be the same.

            – Jayant Das
            22 mins ago











          • @JayantDas yeah, the .cmp file is parsed as XML, and follows the rules of XML precisely. & is the start of a character entity like &gt; and &amp;.

            – sfdcfox
            20 mins ago











          • @JohnTowers +1 for the sharing this, a new learning today. Everyday is a new day in Salesforce.

            – Jayant Das
            18 mins ago











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          1 Answer
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          active

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          3














          Instead of && you can use &amp;&amp; (the HTML entity for &). That seems to satisfy the parser and the expression will still execute your logic correctly.



          So your code will be:



          <aura:if isTrue="{!v.isVisible &amp;&amp; !empty(v.subjectsList)}">






          share|improve this answer



















          • 3





            @JayantDas No, Lightning requires it. It is not specific to the Developer Console. Go ahead and try it out in your favorite IDE. ... It's technically an oversight in the documentation, as far as I can tell. Aura has always worked this way.

            – sfdcfox
            27 mins ago













          • AND function is more readable in case we have 2 parameters: <aura:if isTrue="{!and(v.isVisible, !empty(v.subjectsList))}">

            – Raul
            23 mins ago











          • @sfdcfox that's new to me. I recollect using at least || at places and thought && would be the same.

            – Jayant Das
            22 mins ago











          • @JayantDas yeah, the .cmp file is parsed as XML, and follows the rules of XML precisely. & is the start of a character entity like &gt; and &amp;.

            – sfdcfox
            20 mins ago











          • @JohnTowers +1 for the sharing this, a new learning today. Everyday is a new day in Salesforce.

            – Jayant Das
            18 mins ago
















          3














          Instead of && you can use &amp;&amp; (the HTML entity for &). That seems to satisfy the parser and the expression will still execute your logic correctly.



          So your code will be:



          <aura:if isTrue="{!v.isVisible &amp;&amp; !empty(v.subjectsList)}">






          share|improve this answer



















          • 3





            @JayantDas No, Lightning requires it. It is not specific to the Developer Console. Go ahead and try it out in your favorite IDE. ... It's technically an oversight in the documentation, as far as I can tell. Aura has always worked this way.

            – sfdcfox
            27 mins ago













          • AND function is more readable in case we have 2 parameters: <aura:if isTrue="{!and(v.isVisible, !empty(v.subjectsList))}">

            – Raul
            23 mins ago











          • @sfdcfox that's new to me. I recollect using at least || at places and thought && would be the same.

            – Jayant Das
            22 mins ago











          • @JayantDas yeah, the .cmp file is parsed as XML, and follows the rules of XML precisely. & is the start of a character entity like &gt; and &amp;.

            – sfdcfox
            20 mins ago











          • @JohnTowers +1 for the sharing this, a new learning today. Everyday is a new day in Salesforce.

            – Jayant Das
            18 mins ago














          3












          3








          3







          Instead of && you can use &amp;&amp; (the HTML entity for &). That seems to satisfy the parser and the expression will still execute your logic correctly.



          So your code will be:



          <aura:if isTrue="{!v.isVisible &amp;&amp; !empty(v.subjectsList)}">






          share|improve this answer













          Instead of && you can use &amp;&amp; (the HTML entity for &). That seems to satisfy the parser and the expression will still execute your logic correctly.



          So your code will be:



          <aura:if isTrue="{!v.isVisible &amp;&amp; !empty(v.subjectsList)}">







          share|improve this answer












          share|improve this answer



          share|improve this answer










          answered 35 mins ago









          John TowersJohn Towers

          2,1151816




          2,1151816








          • 3





            @JayantDas No, Lightning requires it. It is not specific to the Developer Console. Go ahead and try it out in your favorite IDE. ... It's technically an oversight in the documentation, as far as I can tell. Aura has always worked this way.

            – sfdcfox
            27 mins ago













          • AND function is more readable in case we have 2 parameters: <aura:if isTrue="{!and(v.isVisible, !empty(v.subjectsList))}">

            – Raul
            23 mins ago











          • @sfdcfox that's new to me. I recollect using at least || at places and thought && would be the same.

            – Jayant Das
            22 mins ago











          • @JayantDas yeah, the .cmp file is parsed as XML, and follows the rules of XML precisely. & is the start of a character entity like &gt; and &amp;.

            – sfdcfox
            20 mins ago











          • @JohnTowers +1 for the sharing this, a new learning today. Everyday is a new day in Salesforce.

            – Jayant Das
            18 mins ago














          • 3





            @JayantDas No, Lightning requires it. It is not specific to the Developer Console. Go ahead and try it out in your favorite IDE. ... It's technically an oversight in the documentation, as far as I can tell. Aura has always worked this way.

            – sfdcfox
            27 mins ago













          • AND function is more readable in case we have 2 parameters: <aura:if isTrue="{!and(v.isVisible, !empty(v.subjectsList))}">

            – Raul
            23 mins ago











          • @sfdcfox that's new to me. I recollect using at least || at places and thought && would be the same.

            – Jayant Das
            22 mins ago











          • @JayantDas yeah, the .cmp file is parsed as XML, and follows the rules of XML precisely. & is the start of a character entity like &gt; and &amp;.

            – sfdcfox
            20 mins ago











          • @JohnTowers +1 for the sharing this, a new learning today. Everyday is a new day in Salesforce.

            – Jayant Das
            18 mins ago








          3




          3





          @JayantDas No, Lightning requires it. It is not specific to the Developer Console. Go ahead and try it out in your favorite IDE. ... It's technically an oversight in the documentation, as far as I can tell. Aura has always worked this way.

          – sfdcfox
          27 mins ago







          @JayantDas No, Lightning requires it. It is not specific to the Developer Console. Go ahead and try it out in your favorite IDE. ... It's technically an oversight in the documentation, as far as I can tell. Aura has always worked this way.

          – sfdcfox
          27 mins ago















          AND function is more readable in case we have 2 parameters: <aura:if isTrue="{!and(v.isVisible, !empty(v.subjectsList))}">

          – Raul
          23 mins ago





          AND function is more readable in case we have 2 parameters: <aura:if isTrue="{!and(v.isVisible, !empty(v.subjectsList))}">

          – Raul
          23 mins ago













          @sfdcfox that's new to me. I recollect using at least || at places and thought && would be the same.

          – Jayant Das
          22 mins ago





          @sfdcfox that's new to me. I recollect using at least || at places and thought && would be the same.

          – Jayant Das
          22 mins ago













          @JayantDas yeah, the .cmp file is parsed as XML, and follows the rules of XML precisely. & is the start of a character entity like &gt; and &amp;.

          – sfdcfox
          20 mins ago





          @JayantDas yeah, the .cmp file is parsed as XML, and follows the rules of XML precisely. & is the start of a character entity like &gt; and &amp;.

          – sfdcfox
          20 mins ago













          @JohnTowers +1 for the sharing this, a new learning today. Everyday is a new day in Salesforce.

          – Jayant Das
          18 mins ago





          @JohnTowers +1 for the sharing this, a new learning today. Everyday is a new day in Salesforce.

          – Jayant Das
          18 mins ago


















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