Inline native methods of JS types

[j-f1]

I’ve created this gist (AST Explorer) for some array methods. This could get expanded with string methods:

// In:
'1|2|3'.split('|');
'1|2|3'.split('|')[1];
[1, 2, 3].toString();
[a, b, c].toString();
[1, 2, 3].indexOf(b) !== -1;
// Out:
['1', '2', '3'];
'2';
'1,2,3';
[a,b,c].join(',');
[1, 2, 3].includes(b);

I’ve written the plugin to be easily expandable to other methods.

[hzoo]

Hey @j-f1! We really appreciate you taking the time to report an issue. The collaborators
on this project attempt to help as many people as possible, but we're a limited number of volunteers,
so it's possible this won't be addressed swiftly.

If you need any help, or just have general Babel or JavaScript questions, we have a vibrant Slack
community that typically always has someone willing to help. You can sign-up here
for an invite.

[boopathi]

@j-f1 looks good! Would you like to send a PR to minify-builtins or constant-folding

I'd prefer constant-folding as this is essentially doing that.