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Fix problem when minifying with Uglify2#110

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pjeweb wants to merge 2 commits into
js-cookie:masterfrom
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Fix problem when minifying with Uglify2#110
pjeweb wants to merge 2 commits into
js-cookie:masterfrom
pjeweb:master

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@pjeweb

@pjeweb pjeweb commented Nov 17, 2015

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Code did not work because basically [1, undefined, 2].join('') gets minified to 1 + undefined + 2 in Uglify2 with compress.evaluate option set to true.
Also make code better understandable :)

Tested with https://skalman.github.io/UglifyJS-online/:

function a() {
  return (document.cookie = [
    key, '=', value,
    attributes.expires && '; expires=' + attributes.expires.toUTCString(), // use expires attribute, max-age is not supported by IE
    attributes.path    && '; path=' + attributes.path,
    attributes.domain  && '; domain=' + attributes.domain,
    attributes.secure ? '; secure' : ''
  ].join(''));
}
function a(){return document.cookie=key+"="+value+(attributes.expires&&"; expires="+attributes.expires.toUTCString())+(attributes.path&&"; path="+attributes.path)+(attributes.domain&&"; domain="+attributes.domain)+(attributes.secure?"; secure":"")}

@pjeweb
Fix problem when minifying with Uglify2
7b9cf25 
Code did not work because `[1, undefined, 2].join('')` gets minified to `1 + undefined + 2` in Uglify2 with compress.evaluate option set to true.
Also make code better understandable :)
@pjeweb
Fixed typo
3b7c3cb 
copy paste failed here ;)
@FagnerMartinsBrack

FagnerMartinsBrack commented Nov 17, 2015

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I will take a look on it later, but it seems to be a problem with Uglify2.

@pjeweb

pjeweb commented Nov 18, 2015

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Yes it's UglifyJS's problem but still this code relies on a not easily understandable feature of JS.
Another option would be to use the foo ? 'bar' : ''; syntax as it is used for attributes.secure already, preventing undefined in the array. This way you don't need to change as much. It stays compact while being consistent :)

@FagnerMartinsBrack

FagnerMartinsBrack commented Nov 18, 2015

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this code relies on a not easily understandable feature of JS

That's a trade-off that was made in order to maintain the "~800 bytes gzipped" bullet point documented in the "Features" section of the README. Right now we have 874 bytes gzipped as from #71.

I understand the legibility argument and I agree with that. The point is that we have currently 100% test coverage and use TDD extensively, so it is unlikely that a bug arises from now on because of those legibility problems.

Feel free to throw a grunt compare-size comparison. If it cut a single byte and there is no external implications, then I will be 👍 to merge it

@pjeweb pjeweb mentioned this pull request Nov 19, 2015
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@pjeweb

pjeweb commented Nov 19, 2015

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There is apparently a pull request for that issue in Uglify from 2013 (mishoo/UglifyJS#301). Hope it gets fixed there. When I have the time I will look into grunt compare-size though.

@FagnerMartinsBrack

FagnerMartinsBrack commented Nov 19, 2015

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In the mean time you can use the minified version from the Releases page or build your own minified file using:

$ grunt

@pjeweb

pjeweb commented Nov 20, 2015

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Well we have a running build process (using gulp, babel, browserify) and integrating another build process into that is not really worth it.
But as a comment on the issue (mishoo/UglifyJS#301 (comment)) on Uglify noted it was due to an unsafe option that I somehow enabled in all my tests :)

@pjeweb pjeweb closed this Nov 20, 2015
@pjeweb

pjeweb commented Nov 20, 2015

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Btw thanks for responding fast and this project 👍

@FagnerMartinsBrack

FagnerMartinsBrack commented Nov 20, 2015

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You're welcome. Good hacking 👍

@FagnerMartinsBrack FagnerMartinsBrack added this to the v2.1.0 milestone Dec 13, 2015
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