I presume you've read the historical threads on this topic, which go back several years. Bob
On Mon, Feb 26, 2018 at 11:04 AM, Alexander Shvets <[email protected]> wrote: > # The Problem > > ES6 destructuring syntax isn't very readable and useful, especially for > assigning to properties of existing object: > > // ES6 > ({ > a: target.a, > b: target.b, > c: target.c, > } = srcObject); > > // Versus ES3 > target.a = srcObject.a; > target.b = srcObject.b; > target.c = srcObject.c; > > There is no reasons to start using new ES6 destructuring syntax now, old > syntax is better, because: > - there is hard to assume that `target` object will be modified, if > developer does not familar with new standart > - identifiers are still duplicated > - you should write braces `()` or use other solution, because JS statement > cannot starts with `{` > > # Proposal > > So, in addition to current ES6 syntax, I want to propose this sugar: > > target.{a,b,c} = srcObject > //alternative// target.* = srcObject{a,b,c} > > ## Why? > + This syntax is more clear and understandable: > even without ES6 knowleges, developer can assume that some properties > assigned to the left-side `target` from a right-side `srcObject` variable. > + The one of destructuring goal is met: full elimination of identifiers > duplication. > + You can omit braces `()` because JS statement doesn't starts with `{` > now. > > #### New syntax for Object.assign() > > let target = {a:0} > > target.* = {b:1, c:2} > //alternative// target.{} = ... > > console.log(target) // {a:0, b:1, c:2} > > Useful for: > > + adding properties to the `this` object in constructor > + adding methods to the prototype of class > > #### Extracting properties into local variables > > let * = {a:1, b:2} // like import * from 'module' > console.log(a, b) // 1 2 > > > GitHub Repo: > https://github.com/transpiling/destructuring-into-object > > _______________________________________________ > es-discuss mailing list > [email protected] > https://mail.mozilla.org/listinfo/es-discuss > >
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