2 use List::Util qw(sum max first);
3 no if $] >= 5.018, warnings => 'experimental::smartmatch';
6 title => 'browser compatibility cheat sheet',
9 "Compatibility table of new web features (HTML5, CSS3, SVG, Javascript)",
10 "comparing support and usage share for all popular browser versions.",
13 web browser support compatibility usage matrix available feature
14 html html5 css css3 svg javascript js dom mobile
15 ie internet explorer firefox chrome safari webkit opera
17 stylesheet => [qw'circus dark mono red light'],
18 data => ['data/browser/support.inc.pl'],
21 say "<h1>Browser compatibility</h1>\n";
23 my $caniuse = do 'data/browser/support.inc.pl' or die $@ || $!;
25 # mark last three (future) versions as unreleased, ensure current isn't
27 $_->[-1] => 0, $_->[-2] => 0, $_->[-3] => 0,
30 } for values %{ $caniuse->{agents} };
51 p => 'plugin required',
52 j => 'javascript required',
55 d => 'disabled by default',
60 ($caniuse->{agents}->{$_[0]}->{prefix_exceptions} // {})->{$_[1]}
61 // $caniuse->{agents}->{$_[0]}->{prefix} // (),
65 my %PSTATS = ( # score percentage
67 a => .5, 'a x' => .5, 'a d' => .1,
68 j => .2, 'p j' => .2, 'n d' => .2, 'n x d' => .2,
69 p => .2, 'p p' => .2, 'p d' => .1,
73 unoff => 'l1', # unofficial
75 cr => 'l3', # candidate
76 pr => 'l3', # proposed
77 rec => 'l5', # recommendation
79 ietf => 'l0', # standard
80 other => 'l0', # non-w3
83 while (my ($browser, $row) = each %{ $caniuse->{agents} }) {
84 $versions{$browser} = [
85 sort { paddedver($a) cmp paddedver($b) } grep { defined }
91 <p id="intro">Alternate rendition of Fyrd's <a href="http://caniuse.com/">when can I use...</a> page
93 my ($canihas, $usage);
94 my $minusage = $get{threshold} // 1;
95 given ($get{usage} // 'wm') {
99 when (!m{ \A [a-z]\w+ (?:/\d[\d-]*\d)? \z }x) {
101 'Invalid browser usage data request',
102 'Identifier must be alphanumeric name or <q>0</q>.',
105 $canihas = do "data/browser/usage-$_.inc.pl" or do {
106 Alert('Browser usage data not found', $@ || $!);
110 my $ref = $canihas->{-title} || 'unknown';
111 $ref = showlink($ref, $_)
112 for $canihas->{-site} || $canihas->{-source} || ();
113 $ref .= " $_" for $canihas->{-date} || ();
114 print "\nwith $ref browser usage statistics";
118 if ($usage) { # first() does not work inside given >:(
119 # adapt version usage to actual support data
120 my %engineuse; # prefix => usage sum
121 for my $browser (keys %versions) {
122 my $row = $canihas->{$browser} // {};
123 my $verlist = $versions{$browser} or next;
124 if ($minusage and sum(values %$row) < $minusage) {
125 delete $versions{$browser};
128 my %supported = map { $_ => 1 } @$verlist;
130 # cascade unknown versions
131 $row->{$_} //= undef for @$verlist; # ensure stable keys during iteration
132 while (my ($version, $usage) = each %$row) {
133 next if defined $supported{$version};
134 my $next = first { paddedver($_) ge paddedver($version) } @$verlist
135 or warn("No fallback found for $browser v$version; $usage% ignored"), next;
136 $row->{$next} += $usage;
137 $row->{$version} = 0; # balance browser total
140 # build row list for each version
142 my @vershown; # $verlist replacement
143 my ($rowusage, @verrow) = (0); # replacement row tracking
145 push @verrow, $_; # queue each version
146 if (($rowusage += $row->{$_}) >= $minusage) {
147 push @vershown, [@verrow]; # add row
148 ($rowusage, @verrow) = (0); # reset row tracking
151 push @vershown, \@verrow if @verrow; # always add latest
152 @$verlist = @vershown;
155 @$verlist = map { [$_] } @$verlist;
158 # reusable aggregates (grouped by prefix (engine) and browser)
159 $engineuse{ $caniuse->{agents}->{$browser}->{prefix} } +=
160 $row->{-total} = sum(values %$row);
163 # order browser columns by usage grouped by engine
165 $engineuse{ $caniuse->{agents}->{$b}->{prefix} } <=>
166 $engineuse{ $caniuse->{agents}->{$a}->{prefix} }
168 $canihas->{$b}->{-total} <=> $canihas->{$a}->{-total}
172 # order browser columns by name grouped by engine
173 @{$_} = map { [$_] } @{$_} for values %versions;
175 $caniuse->{agents}->{$b}->{prefix} cmp
176 $caniuse->{agents}->{$a}->{prefix}
189 my $zero = $#$_ - 2; # baseline index
190 ($_->[$zero - 2] => .5), # past
191 ($_->[$zero - 1] => 10 ), # previous
192 ($_->[$zero + 2] => 0 ), # future
193 ($_->[$zero + 1] => .5), # next
194 ($_->[$zero ] => 30 ), # current
195 } $caniuse->{agents}->{$_}->{versions}
198 }; # fallback hash based on release semantics
199 my $usagemax = (max(map { ref $_ eq 'HASH' && sum(values %$_) } values %$canihas) // 1) / 100;
201 my $usagepct = 1; # score multiplier for 0..100 result
202 # normalise usage percentage to only include shown browsers
203 $usagepct = 100.01 / featurescore({ # yes for every possible version
204 map { $_ => { map {$_ => 'y'} map { @{$_} } @{$versions{$_}} } } keys %versions
207 print '<table class="mapped">';
208 print '<col span="3">'; # should match first thead row
209 printf '<colgroup span="%d">', scalar @{ $versions{$_} } for @browsers;
210 say '</colgroup><col>';
212 my $header = join('',
214 '<th colspan="3" rowspan="2">feature',
216 my $name = $caniuse->{agents}->{$_}->{browser};
217 sprintf('<th colspan="%d" class="%s" title="%s">%s',
218 scalar @{ $versions{$_} },
219 join(' ', map {"b-a-$_"} grep {$_}
220 $_, @{ $caniuse->{agents}->{$_} }{'prefix', 'type'},
223 sprintf('%.1f%%', $canihas->{$_}->{-total} * $usagepct),
227 length $name <= (3 * @{ $versions{$_} }) ? $name
228 : $caniuse->{agents}->{$_}->{abbr};
234 print '<thead>', $header;
235 # preceding row without any colspan to work around gecko bug
237 for my $browser (@browsers) {
238 for (@{ $versions{$browser} }) {
239 my $lastver = $_->[-1];
240 my $release = $caniuse->{agents}->{$browser}->{verrelease}->{$lastver};
241 my $future = defined $release;
242 printf('<td title="%s"%s>%s',
244 sprintf('%.1f%%', sum(@{ $canihas->{$browser} }{@$_}) * $usagepct),
245 $future ? 'development' : (),
246 'version ' . join(', ', @{$_}),
248 $future && ' class="ex"',
249 showversions($lastver),
254 say '<tfoot>', $header;
256 # prefix indicates browser family; count adjacent families
257 my (@families, %familycount);
258 for my $browser (@browsers) {
259 my $family = $caniuse->{agents}->{$browser}->{prefix};
260 push @families, $family unless $familycount{$family};
261 $familycount{$family} += @{ $versions{$browser} };
264 print "\n", '<tr class="cat">';
265 printf '<th colspan="%d">%s', $familycount{$_}, $_ for @families;
270 # relative amount of support for given feature
272 if (my $row = shift) {
274 while (my ($browser, $versions) = each %$row) {
275 ref $versions eq 'HASH' or next;
276 while (my ($version, $status) = each %$versions) {
277 $status =~ s/\h\#\d+//g;
278 $rank += ($canihas->{$browser}->{$version} || .001) * $PSTATS{$status};
284 while (my ($browser, $vercols) = each %versions) {
285 my $div = 0; # multiplier exponent (decreased to lower value)
286 my @vers = map { $row->{$browser}->{$_} } @$vercols;
287 if (my $current = $caniuse->{agents}->{$browser}->{versions}->[-3]) {
288 my @future; # find upcoming releases (after current)
289 for (reverse @$vercols) {
290 last if $_ eq $current;
291 push @future, pop @vers;
292 $_ eq 'u' and $_ = $vers[-1] for $future[-1]; # inherit latest value if unknown
294 splice @vers, -1, 0, @future; # move ahead to decrease precedence
296 $rank += $PSTATS{$_} * 2**($div--) for reverse @vers;
305 s/\r\n?/\n/g; # windows returns
306 s/\h* $//gmx; # trailing whitespace
307 s/(?<= [^.\n]) $/./gmx; # consistently end each line by a period
309 s{ ` ([^`]*) ` }{<code>$1</code>}gx;
310 s{ \[ ([^]]*) \] \( ([^)]*) \) }{<a href="$2">$1</a>}gx;
319 s{ \[ ([^]]*) \] \( [^)]* \) }{$1}gx; # strip link urls
326 my $row = $caniuse->{data}->{$id};
328 for ($row->{categories}) {
329 my $cell = $_ ? lc $_->[0] : '-';
330 $cell =~ s/ api$//; # trim unessential fluff in 'js api'
331 printf '<th title="%s">%s', join(' + ', @$_), $cell;
335 sprintf('<a href="%s" onclick="%s">%s</a>',
337 sprintf("try { %s; return false } catch(err) { return true }",
338 "document.getElementById('$id').classList.toggle('target')",
343 print '<div class=aside>';
345 for formatnotes($row->{description}, $row->{notes} || ());
346 if (my %notes = %{ $row->{notes_by_num} }) {
347 say '<p>Browser-specific notes:';
348 say "<br>#$_: ", formatnotes($notes{$_}) for sort keys %notes;
351 printf 'Resources: %s.', join(', ', map {
352 showlink($_->{title}, $_->{url})
353 } @$_) for grep { @$_ } $row->{links} // ();
354 printf '<br>Parent feature: %s.', join(', ', map {
355 showlink($caniuse->{data}->{$_}->{title}, "#$_")
356 } $_) for $row->{parent} || ();
362 my $row = $caniuse->{data}->{$id};
364 for ($row->{status}) {
365 my $cell = $_ // '-';
366 $cell = showlink($cell, $_) for $row->{spec} // ();
367 printf '<td title="%s" class="l %s">%s',
368 $caniuse->{statuses}->{$_}, $CSTATUS{$_} // '', $cell;
373 my ($id, $browser) = @_;
374 my $feature = $caniuse->{data}->{$id};
375 my $data = $feature->{stats}->{$browser};
376 if (ref $data eq 'ARRAY') {
377 # special case for unsupported
378 my $release = $caniuse->{agents}->{$browser}->{verrelease};
380 map { $_ => defined $release->{$_} ? 'u' : 'n' } keys %$release
385 for my $ver (@{ $versions{$browser} }, undef) {
387 !defined $ver ? undef : # last column if nameless
388 ref $data ne 'HASH' ? '' : # unclassified if no support hash
389 $data->{ $ver->[-1] } // $prev # known or inherit from predecessor
390 // (grep { defined } @{$data}{ map { $_->[0] } @{ $versions{$browser} } })[0]
391 ~~ 'n' && 'n' # first known version is unsupported
394 unless (!defined $prev or $prev ~~ $compare) {
395 my $usage = sum(@{ $canihas->{$browser} }{ map { @{$_} } @span });
397 # strip #\d note references from support class
399 push @notes, $feature->{notes_by_num}->{$1}
400 while $prev =~ s/\h \# (\d+) \b//x;
402 # prepare version hover details
403 my $title = sprintf('%.1f%% %s', $usage * $usagepct, join(', ',
404 map { ref $_ eq 'CODE' ? $_->($browser, $span[0]->[0]) : $_ }
405 map { $DSTATS{$_} // () }
406 map { split / /, $_ }
409 $title .= "\n$_" for notestotitle(@notes);
411 printf('<td class="%s" colspan="%d" title="%s">%s',
414 !$usage ? ('p0') : ('p',
415 sprintf('p%01d', $usage * ($usagepct - .0001) / 10),
416 sprintf('p%02d', $usage * ($usagepct - .0001)),
418 sprintf('pp%02d', $usage / $usagemax),
422 showversions($span[0]->[0], @span > 1 ? ($span[-1]->[-1]) : ()),
427 push @span, $ver && [ grep { $data->{ $_ } eq $data->{ $ver->[-1] } } @{$ver} ];
434 print '<td>', int featurescore($caniuse->{data}->{$id}->{stats}) * $usagepct;
439 featurescore($caniuse->{data}->{$b}->{stats})
440 <=> featurescore($caniuse->{data}->{$a}->{stats})
441 } keys %{ $caniuse->{data} }) {
442 $caniuse->{data}->{$id}->{stats} or next; # skip metadata [summary]
443 printf '<tr id="%s">', $id;
446 saybrowsercols($id, $_) for @browsers;
454 # normalised version number comparable as string (cmp)
455 shift =~ /(?:.*-|^)(\d*)(.*)/;
456 # matched (major)(.minor) of last value in range (a-B)
457 return sprintf('%02d', $1 || 99) . $2;
461 my @span = ($_[0], @_>1 ? $_[-1] : ());
462 s/-.*// for $span[0];
468 return join('‒', @span);
475 <table class="glyphs"><tr>
476 <td class="X l5">supported
477 <td class="X l3">partial
478 <td class="X l2">optional
479 <td class="X l1">missing
480 <td class="X l0">unknown
481 <td class="X ex">prefixed
484 <p><: if ($usage) { :>
486 <span class=" p0">0</span> -
487 <span class="p p0 p00">.01</span> -
488 <span class="p p0 p05">1-9</span> -
489 <span class="p p1">10</span> -
490 <span class="p p2">20</span> -
491 <span class="p p5">majority</span>
493 <table class="glyphs"><tr>
494 <td class="p p1">previous version</td>
495 <td class="p p3">current</td>
496 <td class="p p0 p00">upcoming (within months)</td>
497 <td class=" p0">future (within a year)</td>
502 <ul class="legend legend-set">
503 <li>default <strong>style</strong> is
504 <:= defined $get{style} && 'set to ' :><em><:= $style :></em>
505 <li><strong>usage</strong> source is
506 <:= !defined $get{usage} && 'default ' :><:= defined $usage ? "<em>$usage</em>" : 'not included (<em>0</em>)' :>
507 <li>usage <strong>threshold</strong> is
508 <:= defined $get{threshold} && 'changed to ' :><em><:= $minusage :>%</em>
513 <script type="text/javascript" src="/searchlocal.js"></script>
514 <script type="text/javascript"> prependsearch(document.getElementById('intro')) </script>