List View Command - async checking for command visibility

[Gostron]

#4401 ## Category

• Question
• Typo
• Bug
• Additional article idea

Expected or Desired Behavior

I'm trying to have an async check on command visibility as my conditions are:

• only one item selected (sync and easy)
• two properties (not in the list view) on the item must have required values (async call needed)
• the user must belong to a particular group (async in the onInit easy)

So I need to make requests in the onListViewUpdated(event) method to determine whether or not I should display my command. I'm expecting the myCommand.visible = true to work within a promise or callback.

Observed Behavior

Whenever I leave the synchronous thread, any action on the command visibility doesn't work:

• setTimeout(() => command.visible = true)
• fetch('w/e').then(r => r.json()).then(r => command.visible = r.display)

I've tried the this.tryGetCommand('myCommand') at the beginning of the method and inside the asynchronous call without any success what so ever.

I've also tried to find a method to force render but we don't seem to have any control over that.

Steps to Reproduce

just have this

public onListViewUpdated(event: IListViewCommandSetListViewUpdatedParameters): void {
    var myCommand: Command = this.tryGetCommand('MY_COMMAND');
    setTimeout(function () {
      myCommand.visible = true
    }, 1000)
  }

where MY_COMMAND is your existing command.

I'm actually open to any suggestion to go around that. The only async call that I actually need is to check the properties of the selected item (and i don't have them since the event.selectedRows[0].getValueByName('my-field') doesn't garantee the presence of fields).

What I would expect would be that the onListViewUpdated returns a Promise<void> just like the onInit() to actually support asynchronous conditions.

What I gather from the current state is that no command can have async checking on selection, which will compel me in my case to display a command, only to display a panel saying that the item doesn't have the proper values to actually do anything.

[msft-github-bot]

Thank you for reporting this issue. We will be triaging your incoming issue as soon as possible.

[RamaKaryam]

I am having the same problem. This in combination with issue: #4056 limits the scenarios in which list view command sets can be considered as a solution.

[patmill]

I'll forward this thread, but it would be useful to add an entry to user voice along the lines of "Need a way to async update the visibility of a command set". https://sharepoint.uservoice.com/forums/329220-sharepoint-dev-platform

[Gostron]

At that point I was still not sure whether it was a bug or a missing feature
Here is a link to the UserVoice newly created: https://sharepoint.uservoice.com/forums/329220-sharepoint-dev-platform/suggestions/38379679-extensions-command-set-asynchronous-checking-for

[henningeiben]

I just bumped into the same "behavior". Is there any change expected? I would have expected the onListViewUpdated to return a Promise just like the OnInit.

[patmill]

Sorry - this got lost w/ some metadata shuffle. The future of command sets is tracked here. #7375