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Update use-non-blocking-javascript.md

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v4 is deprecated
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Tasos Tsournos 11 months ago committed by GitHub
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@ -15,5 +15,5 @@ JavaScript blocks the normal parsing of the HTML document, so when the parser re
- Add `async` (if the script doesn't rely on other scripts) or `defer` (if the script relies upon or is relied upon by an async script) as an attribute to your script tag. - Add `async` (if the script doesn't rely on other scripts) or `defer` (if the script relies upon or is relied upon by an async script) as an attribute to your script tag.
- If you have small scripts, maybe use inline script place above async scripts. - If you have small scripts, maybe use inline script place above async scripts.
- [Remove Render-Blocking JavaScript](https://developers.google.com/speed/docs/insights/BlockingJS) - [Remove Render-Blocking JavaScript](https://developers.google.com/speed/docs/insights/v5/get-started)
- [Defer loading JavaScript](https://varvy.com/pagespeed/defer-loading-javascript.html) - [Defer loading JavaScript](https://varvy.com/pagespeed/defer-loading-javascript.html)

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