DustJS logic to verify empty string

Question

I need to write logic to check whether the value is empty or it has string. Any help on this.. i tried this following. but it doesn't work in nodejs and throwing error

{@if cond="'{notes}' != '' || '{errors}' != '' "}
   display html
{/if}

Thank you for asking this. It's hard to find good Dust.js documentation. — RayLoveless, Jan 24 '22 at 18:35

score 0 · Answer 1 · answered Mar 30 '15 at 20:00

0

The @if helper is deprecated and should not be used. However, based on the code you've given, you should probably be able to use an exists check.

{?notes}
  {?errors}
    {! Display HTML !}
  {/errors}
{/notes}

If that doesn't work for some reason, you could use the @ne helper.

{@ne key=notes value=""}
   ...
{/ne}

If that still isn't good enough, you could try writing a context helper. The documentation on dustjs.com is excellent.

answered Mar 30 '15 at 20:00

smfoote

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Wouldn't the above code `&&` instead of `||` on both the fields ? – myusuf May 13 '15 at 19:10

score 0 · Answer 2 · answered May 13 '15 at 19:13

0

{?notes}
  Display HTML
{:else}
  {?errors}
    Display HTML
  {/errors}
{/notes}

should do the trick.

answered May 13 '15 at 19:13

myusuf

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DustJS logic to verify empty string

2 Answers2