sort

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sort mutates and sorts as text by default — pass (a,b)=>a-b for numbers.

Which comparator sorts numbers ascending?

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What you start with

const xs=[3,1,2];
console.log(xs.sort((a,b)=>a-b).join(','));

JavaScript 1 automatic check Working with data

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const xs=[3,1,2];
console.log(xs.sort((a,b)=>a-b).join(','));

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One correct answer:

const xs=[3,1,2];
console.log(xs.sort((a,b)=>a-b).join(','));

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