[JS Styleguide] - Disallows multiple `var` declaration

[azevedo]

https://github.com/jscs-dev/node-jscs/blob/f55bbae8bfbd8d57a4f756193d824e6f398ff7a7/lib/rules/disallow-multiple-var-decl.js

Basically I'd go for the exceptUndefined mode.

I happen to do this a lot:

  var a, b;
  // use later on

[zamith]

What's wrong with this?

var a = 1,
    b = 2;

The only issue I can think of is if you want to remove or move either the first or last declaration. Is this enough to disallow it, or is there something else?

[azevedo]

Can't think of any reasons besides those. Actually I think i did assume we were going with a strict approach and this was an attempt to use a more loose one. Nevertheless, I don't think allowing multiple declarations, like your example, brings any benefits.

[zamith]

My only issue, if you can call it that, with this, is that it seems a bit incoherent to force this, and not go with comma first on object definition. It seems to me the same exact problems are present in both situations, wouldn't you say?

[azevedo]

Similar only in the moving around part. My problem with comma first is that it doesn't look good ;) So I would not put these in the same bag

[zamith]

Hum... I don't think this way of declaring variables looks good as well, but I understand the possible benefits. I also don't like comma first, but both situations seem very similar to me, and it seems strange to suggest one and oppose the other.