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Stack Internal
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Explore Stack Internal-1 byte thanks to @Arnauld
f=n=>alert(f=n=>[n,...n)||n&&f?f(Math.random()*n|0):[]] // Alert is replaced with consolef=n=>[n,.log to avoid the popups alert=console.log f=n=>alert(.n)||n&&f?f(Math.random()*n|0):[]]<input type=number id=a><button onclick="fonclick="console.log(af(+a.value))">Test</button>f=n=>alert(n)||n&&f(Math.random()*n|0) // Alert is replaced with console.log to avoid the popups alert=console.log f=n=>alert(n)||n&&f(Math.random()*n|0)<input type=number id=a><button onclick="f(a.value)">Test</button>-1 byte thanks to @Arnauld
f=n=>[n,...n?f(Math.random()*n|0):[]] f=n=>[n,...n?f(Math.random()*n|0):[]]<input type=number id=a><button onclick="console.log(f(+a.value))">Test</button>f=n=>alert(n=Mathn)||n&&f(Math.random()*n|0)||n&&f(n) // Alert is replaced with console.log to avoid the popups alert=console.log f=n=>alert(n=Mathn)||n&&f(Math.random()*n|0)||n&&f(n)<input type=number id=a><button onclick="f(a.value)">Test</button>f=n=>alert(n=Math.random()*n|0)||n&&f(n) // Alert is replaced with console.log to avoid the popups alert=console.log f=n=>alert(n=Math.random()*n|0)||n&&f(n)<input type=number id=a><button onclick="f(a.value)">Test</button>f=n=>alert(n)||n&&f(Math.random()*n|0) // Alert is replaced with console.log to avoid the popups alert=console.log f=n=>alert(n)||n&&f(Math.random()*n|0)<input type=number id=a><button onclick="f(a.value)">Test</button>