Challenge number nineteen is another golf challenge; in this challenge, you must match all the valid HTML tag names in as few characters as possible. You match only valid tag names - more failing test cases may be added later.
To test a regular expression on the test cases below, type it into the text input. Each test case will be marked as passed or failed respectively - you are aiming to get as many test cases as you can to pass. Note that JavaScript must be enabled for this feature to work. The regex engine used is the JavaScript regex engine; it is similar to PCRE, but with a few differences.
Test cases (0 /168) Permalink
a match
abbr match
address match
area match
article match
aside match
audio match
b match
base match
bdi match
bdo match
blockquote match
body match
br match
button match
canvas match
caption match
cite match
code match
col match
colgroup match
command match
datalist match
dd match
del match
details match
dfn match
div match
dl match
dt match
em match
embed match
fieldset match
figcaption match
figure match
footer match
form match
h1 match
h2 match
h3 match
h4 match
h5 match
h6 match
head match
header match
hgroup match
hr match
html match
i match
iframe match
img match
input match
ins match
kbd match
keygen match
label match
legend match
li match
link match
map match
mark match
menu match
meta match
meter match
nav match
noscript match
object match
ol match
optgroup match
option match
output match
p match
param match
pre match
progress match
q match
rp match
rt match
ruby match
s match
samp match
script match
section match
select match
small match
source match
span match
strong match
style match
sub match
summary match
sup match
table match
tbody match
td match
textarea match
tfoot match
th match
thead match
time match
title match
tr match
track match
u match
ul match
var match
video match
wbr match
ab no match
acronym no match
applet no match
az no match
ba no match
basefont no match
big no match
c no match
center no match
d no match
dad no match
dir no match
e no match
eb no match
f no match
font no match
frame no match
frameset no match
g no match
ga no match
gurtrood no match
h no match
h0 no match
h7 no match
h10 no match
in no match
j no match
jam no match
k no match
key no match
l no match
la no match
m no match
man no match
n no match
o no match
old no match
put no match
queen no match
r no match
rn no match
slower no match
strike no match
t no match
tab no match
tf no match
tt no match
un no match
v no match
vw no match
vehicle no match
w no match
weird no match
x no match
xx no match
y no match
yahooa no match
z no match
zebra no match
zebras no match
Congratulations, your regex passes all the test cases! Remember to share this challenge.