On: Ask HN: Anyone know of any largish applications bu...

[andrewstuart]

Never mind - I've just discovered Web Components are not supported at all on Safari, which sinks the idea of Web Components being a viable alternative to anything.

https://caniuse.com/?search=web%20components

Here's the reasoning from Safari developers: https://bugs.webkit.org/show_bug.cgi?id=182671

[WickyNilliams → andrewstuart]

They are supported! Safari does not (and will not, as explained in your link) support one specific API for web components, the `is` attribute:

    <button is="my-button">

But when people talk about web components, they are almost certainly talking about this kind of component:

    <my-button></my-button>

Which is fully supported in safari. The former can be polyfilled, but i doubt (m)any components are being developed like that.

Aside from this, safari has great support for WCs and is just as capable as any other evergreen browser.

[andrewstuart → WickyNilliams]

I cannot see that Safari supports the "connectedCallback" in Custom Elements, which seems to be to be foundational to the entire technology.

https://developer.mozilla.org/en-US/docs/Web/Web_Components/...

If you're correct about Safari's level of support can you referf me to where it supports connectedCallback?

[WickyNilliams → andrewstuart]

The proof, as they say, is in the pudding: https://codepen.io/WickyNilliams/pen/dydoNez

It's been supported for years AFAIK. As long as you extend HTMLElement, and not some other element, everything will work as expected

[bennypowers → andrewstuart]

should have posted this in r/confidentlyincorrect

Yeah, here's my youtube video from 3 years ago preemptively proving you wrong

https://www.youtube.com/watch?v=Vz433mJR2ow