redom/redom

RE:DOM – Tiny turboboosted JavaScript library for creating user interfaces

Mikko Ahlroth

@Nicd

I thought I could hide DOM elements with CSS Grid template-areas, but it doesn't work that way

Juha Lindstedt

@pakastin

I've thought about that (multiple elements inside this.el), but let's see..

nawfalhasan

@nawfalhasan

I am totally new to web development. Was doing some basic internet research on js frameworks to choose from. It's a hobby project, so I can expermint. Have a question on redom

Is it suitable for SPA? Redom looks pretty basic view library and I am not sure if it gives my application an architecture. Also, what about routing, state management etc in redom?

Juha Lindstedt

@pakastin

I’ve used RE:DOM to create the whole iDiD digital signage system (idid.fi, idid2.fi), which is single page application

So yeah, it’s very well suited for that purpose as well 🙂

I use it so that I build component hierarchy, where I pass api along. Then I use that to trigger updates to the state.

I also have a requestAnimationFrame throttle, but that’s not required

But you can use whatever state management you like

I used to use native DOM events, that was also good

Components have constructor and update methods, so that you can efficiently update the state, usually even no diffing needed, since browser keeps care of that

Juha Lindstedt

@pakastin

lists, router and places are good tools to use, too

router is basically a view router, but it’s easy to use with push state or hashes:

const path = location.hash.slice(1).split(’/’);
// i.e. #/info –> [’’, ’info’]

router.update(path[1], state); // ’info’, state

Juha Lindstedt

@pakastin

It’s almost identical to use pushstate..

nawfalhasan

@nawfalhasan

@pakastin thanks, though I dont follow all that technical stuff you say. I am just starting on this whole front-end stuff

Juha Lindstedt

@pakastin

I should make an example app..

nawfalhasan

@nawfalhasan

Yup :)

Mikko Ahlroth

@Nicd

congrats on the 10000 stars! :star: ;)

my service pivoted into the cryptocurrency world: https://twitter.com/code_stats/status/980374287713492993

Juha Lindstedt

@pakastin

Mikko, it’s April 1st 😉

Oh, haha didn’t check out your link first 😄

That’s good one! 😄

White paper is REALLY white 😂👍

Mikko Ahlroth

@Nicd

btw RE:DOM Chrome devtools extension works again in Vivaldi \o/

Juha Lindstedt

@pakastin

👍👍

Mikko Ahlroth

@Nicd

damn I'm doing this.data[sent_at_local.month - 1]['days'][sent_at_local.day].xp += new_xp;

so this.data is a list of objects which have days key that is a list of days which have xp key that I'm updating

and RE:DOM updates a table I render based on that automatically

how does it detect the change? or does it rerender on every update call?

like the whole table

Juha Lindstedt

@pakastin

It detects new items, reordered items and removed items

And calls update on every item yeah

But don’t worry, most of the DOM updates will just be skipped natively if unchanged

I mean textContent, classList.add/remove etc, ...

Mikko Ahlroth

@Nicd

so I guess in my case it's rendering every TD?

Juha Lindstedt

@pakastin

Yeah, but usually it’s ok and super fast

Mikko Ahlroth

@Nicd

yeah :) also it's not a big table

Juha Lindstedt

@pakastin

You can use Chrome dev tools to see purple flashes

Mikko Ahlroth

@Nicd

I just didn't expect it to work right away :D

good idea

Juha Lindstedt

@pakastin

It’s actually usually faster than for example virtual dom or some other diffing, since DOM is native and that way ”blazing fast” 🙂

Mikko Ahlroth

@Nicd

what I just made

Juha Lindstedt

@pakastin

And even if you diff the changed, DOM would also make another diffing

So with RE:DOM you actually save an extra diffing..

However in your case it could be faster to update without the key..

Then it just inserts/removes based on index

Mikko Ahlroth

@Nicd

don't understand that part about the key. but I checked with devtools and at least any extra paints are avoided, it just paints the changed cell if it changed

Mikko Ahlroth

@Nicd

does RE:DOM remember the data last sent to update?

and skip update if it's the same

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