mteb/BrightProStackoverflowRetrieval huggingface dataset:
itHub to file a new issue.")

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##  MDN

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contributors. Content available under  [ a Creative Commons license ](/en-
US/docs/MDN/Writing_guidelines/Attrib_copyright_license) .

  *[
                
                 Deprecated
                
               ]: Deprecated. Not for use in new websites.
  *[
                
                 Non-standard
                
               ]: Non-standard. Check cross-browser support before using.
  *[
            
             Deprecated
            
           ]: Deprecated. Not for use in new websites.
will take you to GitHub to file a new issue.")

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contributors. Content available under  [ a Creative Commons license ](/en-
US/docs/MDN/Writing_guidelines/Attrib_copyright_license) .
8109e145b8bf6c1ee0%0A*+Document+last+modified%3A+2024-01-02T11%3A59%3A13.000Z%0A%0A%3C%2Fdetails%3E
"This will take you to GitHub to file a new issue.")

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  * [ MDN Blog RSS Feed  ](/en-US/blog/rss.xml)

##  MDN

  * [ About ](/en-US/about)
  * [ Blog ](/en-US/blog/)
  * [ Careers ](https://www.mozilla.org/en-US/careers/listings/?team=ProdOps)
  * [ Advertise with us ](/en-US/advertising)

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##  Our communities

  * [ MDN Community ](/en-US/community)
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  * [ MDN Chat ](/discord)

##  Developers

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parent, the  [ Mozilla Foundation ](https://foundation.mozilla.org/) .  
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contributors. Content available under  [ a Creative Commons license ](/en-
US/docs/MDN/Writing_guidelines/Attrib_copyright_license) .

  *[
                
                 Deprecated
                
               ]: Deprecated. Not for use in new websites.
this content
](https://github.com/mdn/content/issues/new?template=page-report.yml&mdn-
url=https%3A%2F%2Fdeveloper.mozilla.org%2Fen-
US%2Fdocs%2FWeb%2FJavaScript%2FReference%2FGlobal_Objects%2FIntl&metadata=%3C%21--+Do+not+make+changes+below+this+line+--%3E%0A%3Cdetails%3E%0A%3Csummary%3EPage+report+details%3C%2Fsummary%3E%0A%0A*+Folder%3A+%60en-
us%2Fweb%2Fjavascript%2Freference%2Fglobal_objects%2Fintl%60%0A*+MDN+URL%3A+https%3A%2F%2Fdeveloper.mozilla.org%2Fen-
US%2Fdocs%2FWeb%2FJavaScript%2FReference%2FGlobal_Objects%2FIntl%0A*+GitHub+URL%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fblob%2Fmain%2Ffiles%2Fen-
us%2Fweb%2Fjavascript%2Freference%2Fglobal_objects%2Fintl%2Findex.md%0A*+Last+commit%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fcommit%2F37713c0c974d024ae6f695f9ae6bc7e26076ee3b%0A*+Document+last+modified%3A+2023-10-20T14%3A18%3A14.000Z%0A%0A%3C%2Fdetails%3E
"This will take you to GitHub to file a new issue.")

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##  MDN

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parent, the  [ Mozilla Foundation ](https://foundation.mozilla.org/) .  
Portions of this content are Â©1998â  2024  by individual mozilla.org
contributors. Content available under  [ a Creative Commons license ](/en-
US/docs/MDN/Writing_guidelines/Attrib_copyright_license) .

  *[
                
                 Deprecated
                
               ]: Deprecated. Not for use in new websites.
  *[
            
             Experimental
            
           ]: Experimental. Expect behavior to change in the future.
s%2Fweb%2Fjavascript%2Freference%2Fglobal_objects%2Freferenceerror%60%0A*+MDN+URL%3A+https%3A%2F%2Fdeveloper.mozilla.org%2Fen-
US%2Fdocs%2FWeb%2FJavaScript%2FReference%2FGlobal_Objects%2FReferenceError%0A*+GitHub+URL%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fblob%2Fmain%2Ffiles%2Fen-
us%2Fweb%2Fjavascript%2Freference%2Fglobal_objects%2Freferenceerror%2Findex.md%0A*+Last+commit%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fcommit%2F6558de67a347fee30c303da8a0b262a9270a6885%0A*+Document+last+modified%3A+2023-05-26T03%3A29%3A23.000Z%0A%0A%3C%2Fdetails%3E
"This will take you to GitHub to file a new issue.")

[ MDN logo  ](/)

Your blueprint for a better internet.

  * [ MDN on Mastodon  ](https://mozilla.social/@mdn)
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  * [ MDN Blog RSS Feed  ](/en-US/blog/rss.xml)

##  MDN

  * [ About ](/en-US/about)
  * [ Blog ](/en-US/blog/)
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Visit  [ Mozilla Corporationâs ](https://www.mozilla.org) not-for-profit
parent, the  [ Mozilla Foundation ](https://foundation.mozilla.org/) .  
Portions of this content are Â©1998â  2024  by individual mozilla.org
contributors. Content available under  [ a Creative Commons license ](/en-
US/docs/MDN/Writing_guidelines/Attrib_copyright_license) .

  *[
                
                 Non-standard
                
               ]: Non-standard. Check cross-browser support before using.
  *[
                
                 Deprecated
                
               ]: Deprecated. Not for use in new websites.
t.mozilla.org/products/mdn-plus)
  * [ Report an issue ](/en-US/docs/MDN/Community/Issues)

##  Our communities

  * [ MDN Community ](/en-US/community)
  * [ MDN Forum ](https://discourse.mozilla.org/c/mdn/236)
  * [ MDN Chat ](/discord)

##  Developers

  * [ Web Technologies ](/en-US/docs/Web)
  * [ Learn Web Development ](/en-US/docs/Learn)
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  * [ Hacks Blog ](https://hacks.mozilla.org/)

[ Mozilla logo  ](https://www.mozilla.org/)

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Visit  [ Mozilla Corporationâs ](https://www.mozilla.org) not-for-profit
parent, the  [ Mozilla Foundation ](https://foundation.mozilla.org/) .  
Portions of this content are Â©1998â  2024  by individual mozilla.org
contributors. Content available under  [ a Creative Commons license ](/en-
US/docs/MDN/Writing_guidelines/Attrib_copyright_license) .

  *[
                
                 Non-standard
                
               ]: Non-standard. Check cross-browser support before using.
  *[
                
                 Deprecated
                
               ]: Deprecated. Not for use in new websites.
hanges+below+this+line+--%3E%0A%3Cdetails%3E%0A%3Csummary%3EPage+report+details%3C%2Fsummary%3E%0A%0A*+Folder%3A+%60en-
us%2Fweb%2Fjavascript%2Freference%2Fglobal_objects%2Furierror%60%0A*+MDN+URL%3A+https%3A%2F%2Fdeveloper.mozilla.org%2Fen-
US%2Fdocs%2FWeb%2FJavaScript%2FReference%2FGlobal_Objects%2FURIError%0A*+GitHub+URL%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fblob%2Fmain%2Ffiles%2Fen-
us%2Fweb%2Fjavascript%2Freference%2Fglobal_objects%2Furierror%2Findex.md%0A*+Last+commit%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fcommit%2Ffb85334ffa4a2c88d209b1074909bee0e0abd57a%0A*+Document+last+modified%3A+2023-09-25T07%3A33%3A31.000Z%0A%0A%3C%2Fdetails%3E
"This will take you to GitHub to file a new issue.")

[ MDN logo  ](/)

Your blueprint for a better internet.

  * [ MDN on Mastodon  ](https://mozilla.social/@mdn)
  * [ MDN on X (formerly Twitter)  ](https://twitter.com/mozdevnet)
  * [ MDN on GitHub  ](https://github.com/mdn/)
  * [ MDN Blog RSS Feed  ](/en-US/blog/rss.xml)

##  MDN

  * [ About ](/en-US/about)
  * [ Blog ](/en-US/blog/)
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Visit  [ Mozilla Corporationâs ](https://www.mozilla.org) not-for-profit
parent, the  [ Mozilla Foundation ](https://foundation.mozilla.org/) .  
Portions of this content are Â©1998â  2024  by individual mozilla.org
contributors. Content available under  [ a Creative Commons license ](/en-
US/docs/MDN/Writing_guidelines/Attrib_copyright_license) .

  *[
                
                 Non-standard
                
               ]: Non-standard. Check cross-browser support before using.
  *[
                
                 Deprecated
                
               ]: Deprecated. Not for use in new websites.
* [ MDN Community ](/en-US/community)
  * [ MDN Forum ](https://discourse.mozilla.org/c/mdn/236)
  * [ MDN Chat ](/discord)

##  Developers

  * [ Web Technologies ](/en-US/docs/Web)
  * [ Learn Web Development ](/en-US/docs/Learn)
  * [ MDN Plus ](/en-US/plus)
  * [ Hacks Blog ](https://hacks.mozilla.org/)

[ Mozilla logo  ](https://www.mozilla.org/)

  * [ Website Privacy Notice ](https://www.mozilla.org/privacy/websites/)
  * [ Cookies ](https://www.mozilla.org/privacy/websites/#cookies)
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Visit  [ Mozilla Corporationâs ](https://www.mozilla.org) not-for-profit
parent, the  [ Mozilla Foundation ](https://foundation.mozilla.org/) .  
Portions of this content are Â©1998â  2024  by individual mozilla.org
contributors. Content available under  [ a Creative Commons license ](/en-
US/docs/MDN/Writing_guidelines/Attrib_copyright_license) .

  *[
                
                 Non-standard
                
               ]: Non-standard. Check cross-browser support before using.
  *[
                
                 Deprecated
                
               ]: Deprecated. Not for use in new websites.
don  ](https://mozilla.social/@mdn)
  * [ MDN on X (formerly Twitter)  ](https://twitter.com/mozdevnet)
  * [ MDN on GitHub  ](https://github.com/mdn/)
  * [ MDN Blog RSS Feed  ](/en-US/blog/rss.xml)

##  MDN

  * [ About ](/en-US/about)
  * [ Blog ](/en-US/blog/)
  * [ Careers ](https://www.mozilla.org/en-US/careers/listings/?team=ProdOps)
  * [ Advertise with us ](/en-US/advertising)

##  Support

  * [ Product help ](https://support.mozilla.org/products/mdn-plus)
  * [ Report an issue ](/en-US/docs/MDN/Community/Issues)

##  Our communities

  * [ MDN Community ](/en-US/community)
  * [ MDN Forum ](https://discourse.mozilla.org/c/mdn/236)
  * [ MDN Chat ](/discord)

##  Developers

  * [ Web Technologies ](/en-US/docs/Web)
  * [ Learn Web Development ](/en-US/docs/Learn)
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  * [ Hacks Blog ](https://hacks.mozilla.org/)

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  * [ Website Privacy Notice ](https://www.mozilla.org/privacy/websites/)
  * [ Cookies ](https://www.mozilla.org/privacy/websites/#cookies)
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  * [ Community Participation Guidelines ](https://www.mozilla.org/about/governance/policies/participation/)

Visit  [ Mozilla Corporationâs ](https://www.mozilla.org) not-for-profit
parent, the  [ Mozilla Foundation ](https://foundation.mozilla.org/) .  
Portions of this content are Â©1998â  2024  by individual mozilla.org
contributors. Content available under  [ a Creative Commons license ](/en-
US/docs/MDN/Writing_guidelines/Attrib_copyright_license) .

  *[
                
                 Deprecated
                
               ]: Deprecated. Not for use in new websites.
  *[
                
                 Non-standard
                
               ]: Non-standard. Check cross-browser support before using.
* [ MDN Forum ](https://discourse.mozilla.org/c/mdn/236)
  * [ MDN Chat ](/discord)

##  Developers

  * [ Web Technologies ](/en-US/docs/Web)
  * [ Learn Web Development ](/en-US/docs/Learn)
  * [ MDN Plus ](/en-US/plus)
  * [ Hacks Blog ](https://hacks.mozilla.org/)

[ Mozilla logo  ](https://www.mozilla.org/)

  * [ Website Privacy Notice ](https://www.mozilla.org/privacy/websites/)
  * [ Cookies ](https://www.mozilla.org/privacy/websites/#cookies)
  * [ Legal ](https://www.mozilla.org/about/legal/terms/mozilla)
  * [ Community Participation Guidelines ](https://www.mozilla.org/about/governance/policies/participation/)

Visit  [ Mozilla Corporationâs ](https://www.mozilla.org) not-for-profit
parent, the  [ Mozilla Foundation ](https://foundation.mozilla.org/) .  
Portions of this content are Â©1998â  2024  by individual mozilla.org
contributors. Content available under  [ a Creative Commons license ](/en-
US/docs/MDN/Writing_guidelines/Attrib_copyright_license) .
r.mozilla.org%2Fen-
US%2Fdocs%2FWeb%2FJavaScript%2FReference%2FGlobal_Objects%2FReflect%0A*+GitHub+URL%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fblob%2Fmain%2Ffiles%2Fen-
us%2Fweb%2Fjavascript%2Freference%2Fglobal_objects%2Freflect%2Findex.md%0A*+Last+commit%3A+https%3A%2F%2Fgithub.com%2Fmdn%2Fcontent%2Fcommit%2F70f09675ddcfc75a3bb66d2dce4cf82738948a37%0A*+Document+last+modified%3A+2023-08-21T07%3A19%3A52.000Z%0A%0A%3C%2Fdetails%3E
"This will take you to GitHub to file a new issue.")

[ MDN logo  ](/)

Your blueprint for a better internet.

  * [ MDN on Mastodon  ](https://mozilla.social/@mdn)
  * [ MDN on X (formerly Twitter)  ](https://twitter.com/mozdevnet)
  * [ MDN on GitHub  ](https://github.com/mdn/)
  * [ MDN Blog RSS Feed  ](/en-US/blog/rss.xml)

##  MDN

  * [ About ](/en-US/about)
  * [ Blog ](/en-US/blog/)
  * [ Careers ](https://www.mozilla.org/en-US/careers/listings/?team=ProdOps)
  * [ Advertise with us ](/en-US/advertising)

##  Support

  * [ Product help ](https://support.mozilla.org/products/mdn-plus)
  * [ Report an issue ](/en-US/docs/MDN/Community/Issues)

##  Our communities

  * [ MDN Community ](/en-US/community)
  * [ MDN Forum ](https://discourse.mozilla.org/c/mdn/236)
  * [ MDN Chat ](/discord)

##  Developers

  * [ Web Technologies ](/en-US/docs/Web)
  * [ Learn Web Development ](/en-US/docs/Learn)
  * [ MDN Plus ](/en-US/plus)
  * [ Hacks Blog ](https://hacks.mozilla.org/)

[ Mozilla logo  ](https://www.mozilla.org/)

  * [ Website Privacy Notice ](https://www.mozilla.org/privacy/websites/)
  * [ Cookies ](https://www.mozilla.org/privacy/websites/#cookies)
  * [ Legal ](https://www.mozilla.org/about/legal/terms/mozilla)
  * [ Community Participation Guidelines ](https://www.mozilla.org/about/governance/policies/participation/)

Visit  [ Mozilla Corporationâs ](https://www.mozilla.org) not-for-profit
parent, the  [ Mozilla Foundation ](https://foundation.mozilla.org/) .  
Portions of this content are Â©1998â  2024  by individual mozilla.org
contributors. Content available under  [ a Creative Commons license ](/en-
US/docs/MDN/Writing_guidelines/Attrib_copyright_license) .

  *[
                
                 Deprecated
                
               ]: Deprecated. Not for use in new websites.
act';
    
    export default function RequestTracker() {
      const [pending, setPending] = useState(0);
      const [completed, setCompleted] = useState(0);
    
      async function handleClick() {
        setPending(pending + 1);
        await delay(3000);
        setPending(pending - 1);
        setCompleted(completed + 1);
      }
    
      return (
        <>
          <h3>
            Pending: {pending}
          </h3>
          <h3>
            Completed: {completed}
          </h3>
          <button onClick={handleClick}>
            Buy     
          </button>
        </>
      );
    }
    
    function delay(ms) {
      return new Promise(resolve => {
        setTimeout(resolve, ms);
      });
    }
    
    

Show more

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##  On this page

  * Overview 
  * React batches state updates 
  * Updating the same state multiple times before the next render 
  * What happens if you update state after replacing it 
  * What happens if you replace state after updating it 
  * Naming conventions 
  * Recap 
  * Challenges