Verify if a string contains a substring.

[Roger Delisle]

It's my second day using Knockout and I need some help.

In my ko if: I would like to compare if a value is within a variable.
If the task exist in the listOfTasks it will display a checkbox.

I'm only able to make it work if its a direct compare. listOfTasks === task

 <td data-bind="text: listOfTasks"></td>

  <!-- ko if: listOfTasks.contains(task)   -->

  <td><input id="taskCheckbox" type="checkbox" name="items[]" value=""   /></td>
  <!-- /ko -->

Thanks for your help.

Roger

[Puneet Monga]

Hi Roger,

I think you can achieve this by the following:

<td data-bind=" visible:listOfTasks.indexOf(task) !== -1"><input id="taskCheckbox" type="checkbox" name="items[]" value=""   /></td> (This will hide the element but its still part of the markup)

or by

<td data-bind=" if:listOfTasks.indexOf(task) !== -1"><input id="taskCheckbox" type="checkbox" name="items[]" value=""   /></td> (This section will not appear in the markup if the condition is met)

Reference:

http://knockoutjs.com/documentation/if-binding.html

http://knockoutjs.com/documentation/visible-binding.html

Thanks,

Puneet Monga

Disclaimer: I have not used KO much but my answer is based on whatever I have read. Please excuse my typos.

[Roger Delisle]

Hi Puneet,

 

These examples works fine.

 

Thanks for your help.

 

Roger

 

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