Jsdom: Any way to get scrollHeight property?

[jacekpl]

Is there a way to get a scrollHeight property (https://developer.mozilla.org/en-US/docs/Web/API/Element.scrollHeight)?

[Sebmaster]

The property itself would not be a big deal, you could even patch this quite easily yourself in the created callback. However, for a scrollHeight property which would return something useful, jsdom would need to start doing layouting which is (at least) a loooong way off, if we even want to start doing it.

[jacekpl]

I just wanted to use scrollHeight to check if there is an overflow inside a div. Probably I'll have to look at PhantomJS/SlimerJS instead. Thanks for the answer.

[leepowelldev]

Is there anyway of mocking it? I tried this:

Object.defineProperties(window.HTMLElement.prototype, {
  scrollHeight: {
    get() {
      return this._scrollHeight || 0;
    },
    set(val) {
      this._scrollHeight = val;
    }
  }
});

And got the error: Cannot redefine property: scrollHeight

[bvaughn]

@leepowellcouk Looks like you forgot to add configurable: true to your config. Try e.g.:

Object.defineProperty(HTMLElement.prototype, "scrollHeight", {
  configurable: true,
  get: function() {
    return this._scrollHeight || 0;
  },
  set(val) {
    this._scrollHeight = val;
  }
});