With Lightning most of my use case has been creating a component and adding it to the Lightning app builder page. I use just to preview my component behavior from developer console.

Having said this I see developers/salesforce docs load the SLDS as static resource and reference it in components using ltng:require



The major disadvantage I see with this method is getting struck to a specific version and constantly having to update the slds version in the static resource to the latest version from the server. Is there any way I can extend/ implement the force:slds as an interface at a component level?

For the sake of argument if I use only lightning:XXXX components in my code, I will inherit lightning styling by default but this is not possible all the time. When using ui:XXX and custom html components I will have to use the SLDS as a static resource to apply styling on my non lightning:XXXX components.

Am I missing something basic (or) is loading SLDS as a static resource the only way to use SLDS at a component level?

  • 1
    You don’t need to load anything. The slds just works by default in lightning. Am I misunderstanding your question? I don’t even use the extends:slds
    – Eric
    Commented Oct 13, 2017 at 0:32
  • @Eric can you post that as an answer, I always thought slds has to be included through ltng:require to apply the style to in a custom component. I missed the basic concept that SLDS is part of lightning and <button class="slds-button slds-button_neutral">Refresh</button> would resolve with lightning styles applied because as you said slds is part of lightning.
    – Rao
    Commented Oct 13, 2017 at 0:51
  • Done. Not sure what the use case is for extending force:slds is though
    – Eric
    Commented Oct 13, 2017 at 1:32

1 Answer 1


You don’t need to load anything. The slds just works by default in lightning

I may be missing some use cases though as I am not sure why there is documentation stating you should extend force:slds when I have never needed to.....

  • My guess is Including the force:slds as static resource may have been relevant when exposing component in a vf page prior to winter 18 , but with lightstylesheets= true / apex:slds option at the apex:page level we may no more need slds as static resource
    – Rao
    Commented Oct 13, 2017 at 1:43
  • @Rao - Yea, but the extends="force:slds" is only relevant to the lightning component so not sure what its purpose is now yet the winter 18 documentation still includes it
    – Eric
    Commented Oct 13, 2017 at 1:46
  • In a application perspective, you still need the extends=force:slds in your aura:application and when previewing the component from the developer console right?
    – Rao
    Commented Oct 13, 2017 at 1:50
  • @Rao - not sure. I have never had to use it. Then again I don't use dev console at all so maybe. I have several lightning applications but none of them use the force:slds and they work just fine since lightning automatically includes the styles
    – Eric
    Commented Oct 13, 2017 at 1:52
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    When you include <c:component> inside aura:application from dev console my understanding is the aura:application works like a stand alone app/ a seperate container where the page does not have context of lightning stylesheets, hence we need to extend force:slds to apply the lightning style sheets
    – Rao
    Commented Oct 13, 2017 at 1:56

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