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if you extend your definition of labeled arguments to include destructured objects js still is a contender 😅 example = ({ w, h = w * 2 }) => console.log(`width: ${w}, height: ${h}`)

I had to check, does it toposort? But no, it's ordered: > example = ({ w = h * 2, h = w * 2 }) => ({w,h}) > example({w:10}) { w: 10, h: 20 } > example({h:10}) ReferenceError: Cannot access 'h' before initialization > example({}) ReferenceError: Cannot access 'h' before initialization