windows 10 pro office 2019 pro office 365 pro windows 10 home windows 10 enterprise office 2019 home and business office 2016 pro windows 10 education visio 2019 microsoft project 2019 microsoft project 2016 visio professional 2016 windows server 2012 windows server 2016 windows server 2019 Betriebssysteme office software windows server https://softhier.com/ instagram takipçi instagram beğeni instagram görüntüleme instagram otomatik beğeni facebook beğeni facebook sayfa beğenisi facebook takipçi twitter takipçi twitter beğeni twitter retweet youtube izlenme youtube abone instagram

Is it possible to pass a Svelte store as a property on a component?

Asked By: Anonymous

I’ve got a simple REPL example for a simple list-detail editor. It’s made up of three components:

  1. Annotation is the detail
  2. Annotations loops through the data and creates Annotation instances
  3. App is the top-level that creates the Annotations

I’ve figured out how to wire up a custom Svelte store to manage the Array of instance data for the Annotations. I can use this by importing the store directly into the Annotations component and calling it without any props from the top-level App component. However, I’d like to be able to pass the store in as a property on the Annotations component from the App parent, i.e. <Annotations items={store}/>, not <Annotations/>.

Is this possible? I would think that injecting the store from a parent component would be more flexible/testable than importing it from the component itself. Have I done too much dependency injection with Spring in Java and I’m thinking about the Svelte model incorrectly?


Solution

Answered By: Anonymous

Yes, absolutely. This can easily be demonstrated with a few modifications of your REPL.

In App.svelte, as you said:

<Annotations items={annotations} />

In Annotations.svelte, add the items prop, and replace references of annotations with it:

<script>
  export let items = []
  ...
  items.addStuff(...);
</script>

{#each $items as annotation}
  ...
{/each}

There’s no catch at all… You can pass whatever type of value you want as component props, there’s no marshalling or whatever.

You can even pass other components, if you’re so inclined!

<script>
  export let Cmp // yes, can change at runtime, reactive!
</script>

<svelte:component this={Cmp} />

<!-- or -->

{#if Cmp}
  <Cmp />
{/if}

But I digress, sorry! So, it is possible. Now, is it a good idea? I think your experience with Spring & dependency injection totally transfers here. It will indeed make your component more flexible and more testable, at the cost of more boilerplate. There are some situations where this trade off is good, and some where it is bad.

Personally, I’m of the opinion that this pattern often does more good than harm.

One thing to consider is that when you import the store directly into the component, you make it kind of a singleton, data-wise. Even if you can have multiple instances of the component rendered on the screen, they will all necessarily use exactly the same data. On the other hand, when the store is passed by prop, you can reuse the same component with different stores (obviously). You can even swap the store used by a component at runtime, without recreating the component! So, like you said, more flexible.

One issue that arises from this practice is that you’ll have to decide where you will import the stores. What components will be responsible for owning the stores, as opposed to just consume them? How many levels deep are you OK with passing a store down manually by props? In React parlance, we’d probably be speaking “dumb components” vs “containers”. There’s a real question (and debate) here, that is not specific to Svelte, and that gets different answers depending on who you ask, or the kind of project.

One other option to consider is that you can put stores into context, so you won’t have to pass them down through the whole component hierarchy. On the other hand, the data flow becomes harder to track, even though good naming and consistent patterns can really mitigate this problem.

Yet another technique you can consider is to have stores of stores…

To sum it up, you don’t have a lot of limitations on what Svelte let you do, appart from the explicitly stated contracts of its primitives (props, stores, context…). This lets you imagine or reuse techniques from other frameworks, with largely similar outcomes in term of costs and benefits.

techinplanet staff

instagram volgers kopen volgers kopen buy windows 10 pro buy windows 11 pro


Windows 10 Kaufen Windows 10 Pro Office 2019 Kaufen Office 365 Lizenz Windows 10 Home Lizenz Office 2019 Home Business Kaufen windows office 365 satın al follower kaufen instagram follower kaufen porno
Alanya escort Manavgat escort Fethiye escort Kemer escort Didim escort Çanakkale escort Aydın escort Muğla escort Tekirdağ escort Manisa escort Balıkesir escort Trabzon escort Elazığ escort Ordu escort Kütahya escort Isparta escort Rize escort Kahramanmaraş escort Yalova escort Giresun escort Yozgat escort Tokat escort Şanlıurfa escort Sivas escort Batman escort Erzurum escort Sinop escort Kırşehir escort Karaman escort Kırıkkale escort Bolu escort Amasya escort Niğde escort Uşak escort Edirne escort Çorum escort Osmaniye escort Zonguldak escort Van escort Erzincan escort Söke escort Bodrum escort Çerkezköy escort Akhisar escort Bandırma escort Ayvacık escort Akçaabat escort Karakoçan escort Altınordu escort Tavşanlı escort Eğirdir escort Ardeşen escort Afşin escort Altınova escort Bulancak escort Sorgun escort Erbaa escort Viranşehir escort Zara escort Kozluk escort Aziziye escort Ayancık escort Kaman escort Ermenek escort Keskin escort Gerede escort Göynücek escort Bor escort Banaz escort Havsa escort Osmancık escort Bahçe escort Alaplı escort Başkale escort Kemah escort Nazilli escort Fethiye escort Çorlu escort Alaşehir escort Altıeylül escort Biga escort Araklı escort Kovancılar escort Fatsa escort Simav escort Yalvaç escort Çayeli escort Dulkadiroğlu escort Çiftlikköy escort Espiye escort Sarıkaya escort Niksar escort Suruç escort Yıldızeli escort Sason escort Horasan escort Boyabat escort Mucur escort Sarıveliler escort Yahşihan escort Göynük escort Gümüşhacıköy escort Çamardı escort Eşme escort İpsala escort Sungurlu escort Hasanbeyli escort Çaycuma escort İpekyolu escort Refahiye escort Kuşadası escort Marmaris escort Süleymanpaşa escort Turgutlu escort Susurluk escort Gelibolu escort Of escort Ünye escort Domaniç escort Fındıklı escort Elbistan escort Çınarcık escort Tirebolu escort Akdağmadeni escort Turhal escort Eyyübiye escort Suşehri escort Yakutiye escort Gerze escort Mengen escort Merzifon escort Ulukışla escort Sivaslı escort Keşan escort Kadirli escort Ereğli escort Özalp escort Tercan escort Efeler escort Didim escort Çine escort Dalaman escort Menteşe escort Milas escort Ortaca escort Seydikemer escort Ergene escort Kapaklı escort Malkara escort Salihli escort Şehzadeler escort Soma escort Yunusemre escort Ayvalık escort Bigadiç escort Burhaniye escort Gönen escort Karesi escort Çan escort Yenice escort Ortahisar escort Yomra escort Perşembe escort Pazar escort Onikişubat escort Pazarcık escort Türkoğlu escort Eynesil escort Görele escort Piraziz escort Yağlıdere escort Çayıralan escort Boğazlıyan escort Zile escort Siverek escort Karaköprü escort Haliliye escort Akçakale escort Şarkışla escort Gemerek escort Oltu escort Palandöken escort Mudurnu escort Suluova escort Taşova escort Toprakkale escort Kilimli escort Tuşba escort Üzümlü escort