I know I am not the only one who has had several perfectly good use-cases for default values disallowed, because the value coming in was `null`, not `undefined`.
I cannot be the only one who has let bugs slip in because of failing to consider this case. So, if we can find a non-confusing and simple way to alter the spec to allow for handling this, I imagine it would be considered useful and wanted. The obvious candidate is the nullish coalescing operator, which is already part of the spec. Unfortunately, it is currently invalid to indicate default values with it. I can't see any reason against changing this. ``` function foo1 (x = 4) { console.log(x); } // currently causes SyntaxError function foo2 (x ?? 4) { console.log(x); } foo1(null); // null foo1(undefined) // 4 foo2(null); // 4 foo2(undefined) // 4 // currently causes SyntaxError // should give x === null, y === 4 const { x = 2, y ?? 4 } = { x: null, y: null }; ``` -------------------------- Dammit babies, you've got to be kind.
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