23->24 migrating PolymerElement requestUpdateInternal to Lit Element?

Flow
1

Hi all - I’m finally upgrading an application from (flow) v23 to v24 and we’ve got some components that had used polymer 3 Elements and now have to be ported to Lit-Element. For the most part, it has been straightforward, but the old code used requestUpdateInternal and I’m having difficulty figuring out what to do here.
For instance, I see code like the following in the component that

  set _stuff(newValue) {
    const oldValue = this._stuff;
    this.__stuff = newValue;
    if (oldValue !== newValue) {
      this._stuffChanged(newValue, oldValue);
      this.requestUpdateInternal(
        "_stuff",
        oldValue,
        this.constructor.properties._stuff
      );
    }
  }

Oh, and the code in question is still javascript rather than typescript.

Suggestions?

2

In Lit 3.0 used by V24 you can use requestUpdate() method instead, see the changelog:

  • Removed requestUpdateInternal. The requestUpdate method is now identical to this method and should be used instead.
3

Excellent - thanks for the pointer!
Something is still not working, but it is getting close.