#FirstUpdated
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October 2, 2026 at 9:50 AM
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October 2, 2026 at 8:49 AM
Good place to start is the Shoelace QRCode Web Component I’d say. I ended up using the same generation library behind the scenes (github.com/nimiq/qr-cre...) for Nord and the Web Component itself is very simple. See: github.com/shoelace-sty...
November 27, 2024 at 8:12 AM
You don't learn to code accepting PRs
You learn to code by making mistakes yourself,
at least 5 times (took me 9 to really understand shadowDOM)

Yes, firstUpdated or the like in ᴛᴏᴏʟꜱ like Lit
the connectedCallback in Vanilla

My first lesson always starts with:

𝘈 𝘧𝘰𝘰𝘭 𝘸𝘪𝘵𝘩 𝘢 𝘵𝘰𝘰𝘭, 𝘪𝘴 𝘴𝘵𝘪𝘭𝘭 𝘢 𝘧𝘰𝘰𝘭
May 12, 2025 at 8:56 AM
If you go Vanilla connectedCallback.
Be sure to know what the connectedCallback does.

It isn't that difficult to create your own firstUpdated, updated, etc,
Can be created in only a few lines of code.

dev.to/dannyengelma...
Web Component developers do not connect with the connectedCallback (yet)
Disclaimer: This blog post suggests using setTimeout This post was originally written as...
dev.to
December 17, 2024 at 9:55 AM
Interesting. I've been working in Lit-Element for three years and today is the first day I've found a use case for firstUpdated().
January 2, 2024 at 4:26 PM
I’ve had to create our own version of “updateComplete” and “firstUpdated” since the shadow DOM or light DOM weren’t necessarily available/ready when we expected.
May 19, 2025 at 1:53 AM
Is anyone aware of a Web Component abstraction for queuing updates, similar to LitElement? The API for this is great in Lit, but Lit brings in a bunch of other stuff that I don't want.

To be clear, I'm looking for the stuff like firstUpdated, update, updated, etc.
December 17, 2024 at 1:22 AM
But also in firstUpdated you explicitly set a bunch of attributes. Did lit not already set those? 👀
May 11, 2025 at 9:03 PM