3 use List::Util qw(sum max);
6 title => 'browser compatibility cheat sheet',
10 keywords => [qw'html css browser feature'],
11 stylesheet => [qw'light dark circus mono red'],
12 data => ['caniuse.js'],
16 <h1>Browser compatibility</h1>
18 <p>Alternate view of Fyrd's <a href="http://caniuse.com/">when can I use...</a> page
19 with <a href="http://stats.wikimedia.org/archive/squid_reports/">Wikimedia</a>
20 browser usage statistics.</p>
24 use File::Slurp 'read_file';
25 my $source = read_file('caniuse.js');
26 for ($source) { # cleanup
27 # convert seperate variables to hash keys
29 s/^caniuse\.(\w+) = /"$1":/gm;
32 # fractions not supported by barekey
33 s/(?<=[,{]) (\d*\.\d) (?=:')/"$1"/gx;
34 # escapes not supported in singlequote
35 s{'((?:[^\\']+|\\.)*)'}{
42 my $caniuse = from_json($source, {
43 # allow_singlequote => 1,
58 unoff => 'di-rare', # unofficial
60 pr => 'di-prop', # proposed
61 cr => 'di-d', # candidate
62 rec => 'di-a', # recommendation
63 ietf => 'di-aa', # standard
65 my @browsers = qw(trident gecko webkit_saf webkit_chr presto);
67 if (my ($somerow) = values %{ $caniuse->{data} }) {
68 while (my ($browser, $row) = each %{ $somerow->{stats} }) {
69 $versions{$browser} = [ sort { paddedver($a) cmp paddedver($b) } keys %$row ];
73 my $canihas = do 'browser-usage.inc.pl' or do {
74 printf "<p>Browser usage data not found: <em>%s</em>.</p>\n", $_
77 my $scorediv = (max(map { sum(values %$_) } values %$canihas) // 1) / 100;
79 print '<table class="mapped">';
81 printf '<colgroup span="%d">', scalar @{ $versions{$_} } for @browsers;
85 print '<th colspan="3">feature';
86 printf '<th colspan="%d">%s',
87 scalar @{ $versions{$_} }, $caniuse->{agents}->{$_}->{browser}
89 # preceding row without any colspan to work around gecko bug
91 print '<td>' x $_ for 3, (map { scalar @{ $versions{$_} } } @browsers), 1;
95 # relative amount of support for given feature
96 state $statspts = { y=>10, 'y x'=>9, a=>5, 'a x'=>5, j=>2, 'p j'=>2, p=>1 };
98 if (my $row = shift) {
99 while (my ($browser, $vercols) = each %versions) {
100 my $div = 0; # multiplier exponent (decreased to lower value)
101 my @vers = map { $row->{$browser}->{$_} } @$vercols;
102 if (my $current = $caniuse->{agents}->{$browser}->{versions}->[-3]) {
103 my @future; # find upcoming releases (after current)
104 for (reverse @$vercols) {
105 last if $_ eq $current;
106 push @future, pop @vers;
107 $_ eq 'u' and $_ = $vers[-1] for $future[-1]; # inherit latest value if unknown
109 splice @vers, -1, 0, @future; # move ahead to decrease precedence
111 $rank += $statspts->{$_} * 2**($div--) for reverse @vers;
118 featurescore($caniuse->{data}->{$b}->{stats})
119 <=> featurescore($caniuse->{data}->{$a}->{stats})
120 } keys %{ $caniuse->{data} }) {
121 my $row = $caniuse->{data}->{$id};
122 my $data = $row->{stats} or next; # skip metadata [summary]
123 printf '<tr id="%s">', $id;
124 for ($row->{categories}) {
125 my $cell = $_ ? lc $_->[0] : '-';
128 printf '<td title="%s">%s', $row->{description}, $row->{title};
129 for ($row->{status}) {
130 my $cell = $_ // '-';
131 $cell = sprintf '<a href="%s">%s</a>', $_, $cell for $row->{spec} // ();
132 printf '<td title="%s" class="%s">%s',
133 $caniuse->{statuses}->{$_}, $CSTATUS{$_} // '', $cell;
135 for my $browser (@browsers) {
137 for my $ver (@{ $versions{$browser} }, undef) {
138 unless (!defined $prev
139 or $data->{$browser}->{$prev} ~~ $data->{$browser}->{$ver}) {
140 my $usage = sum(map { $canihas->{$browser}->{$_} } @span);
141 printf '<td class="%s" colspan="%d" title="%.1f%%">%s',
143 $CSTATS{ $data->{$browser}->{$prev} },
144 sprintf('opacity%.0f', $usage / $scorediv),
148 showversions(\@span),
156 state $maxscore = featurescore({ # yes for every possible version
157 map { $_ => { map {$_ => 'y'} @{$versions{$_}} } } keys %versions
159 print '<td>', int featurescore($caniuse->{data}->{$id}->{stats}) / $maxscore * 100;
164 # normalised version number comparable as string (cmp)
165 shift =~ /^(\d*)(.*)/;
166 return sprintf('%02d', $1) . $2;
171 splice @$span, 1, -1;
176 return join('‒', @$span);
183 <table class="glyphs"><tr>
184 <td class="X di-aa">supported
185 <td class="X di-a">prefixed
186 <td class="X di-d">partial
187 <td class="X di-prop">external (js/plugin)
188 <td class="X di-b">missing
192 <ul class="legend legend-set">
193 <li>default <strong>style</strong> is
194 <:= defined $get{style} && 'set to ' :><em><:= $style :></em>