Discussion on: Building Web Components with Vanilla JavaScript

[tit pa]

Hi, thanks for this clear post.

Note that when running (Chrome 70), it says
[Deprecation] Element.createShadowRoot is deprecated
and will be removed in M73, around March 2019.
Please use Element.attachShadow instead.

Perhpas you may update the code (I couldnt ...)

[tit pa]

works with

    if (!this.shadowRoot) {
        this.attachShadow({mode: 'open'});
    }
    //this.createShadowRoot();