collapseWhitespace doesn't fully collapses whitespace between two inputs

[EvgenyOrekhov]

minify("<input>    <input>", {collapseWhitespace: true});

Expected: <input><input>
Actual: <input> <input>

HTMLMinifier version: 3.5.2
Node.js version: 8.1.4

[alexlamsl]

That's working as expected - you may view the result in a web browser to see why that single whitespace is preserved.

[scipper]

And why is it preserved? I have the same expectation like @EvgenyOrekhov

[EvgenyOrekhov]

@scipper See https://jsbin.com/tajiwugahe/edit?html Whitespace between <input> tags have the same effect on rendering as whitespace between words.

[scipper]

does this only apply to <input>? what's the rule behind this behaviour? It still not obvious to me.

[EvgenyOrekhov]

@scipper A quick googling revealed that this applies to all inline (such as <input>) and inline-block elements.

[scipper]

Thanks for the explanation! (I wonder what you googled? This information can't be found in the docs or on perfectionkills.com

[EvgenyOrekhov]

@scipper Based on alexlamsl's comment above, I assumed that the collapseWhitespace option is not intended to alter the behavior of the code, so I googled for the rules of HTML rendering, not for the rules of html-minifier. Something like "html whitespace between elements".