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Character classes

Character classes are special notations that matches any character from a certain set. They are also called as Metacharacters. The commonly used Character classes are:

. (dot character) for any character except \n (a newline). Use 's' flag if you want to include it.
\d for digits.
\D for non digits.
\s for spaces, tabs, newlines.
\S for non spaces.
\w for alphanumeric and _ (underscore).
\W for all but \w.

1. Character classes: \w, \W, \d, \D, \s and \S
Word Wrap
Enter input string
Lenovo Z6 Pro, releasing on 23rd April, has Snapdragon 855, 12GB of RAM, 4 cameras and a 4045 mAh battery. It'll cost $800.85 after a 15% discount.
\w matches the word (alphanumerical) characters. This pattern is same as [0-9a-zA-Z_].
\W matches non-word (non-alphanumerical) characters. This pattern is same as [^0-9a-zA-Z_]. The \W pattern matches new-line character as well as seen below.
Enter regex pattern
i - Ignore Case
g - Global Match
m - Multiline
s - Dot All
u - Unicode
y - Sticky
With lastIndex^?
/\w+/gCount:29
Lenovo Z6 Pro, releasing on 23rd April, has Snapdragon 855, 12GB of RAM, 4 cameras and a 4045 mAh battery. It'll cost $800.85 after a 15% discount.
match position
Lenovo 0
Z6 7
Pro 10
releasing 15
on 25
23rd 28
April 33
has 40
Snapdragon 44
855 55
12GB 60
of 65
RAM 68
4 73
cameras 75
and 83
a 87
4045 89
mAh 94
battery 98
It 107
ll 110
cost 113
800 119
85 123
after 126
a 132
15 134
discount 138
Enter regex pattern
i - Ignore Case
g - Global Match
m - Multiline
s - Dot All
u - Unicode
y - Sticky
With lastIndex^?
/\W+/gCount:29
Lenovo Z6 Pro, releasing on 23rd April, has Snapdragon 855, 12GB of RAM, 4 cameras and a 4045 mAh battery. It'll cost $800.85 after a 15% discount.
match position
6
9
, 13
24
27
32
, 38
43
54
, 58
64
67
, 71
74
82
86
88
93
97
. 105
' 109
112
$ 117
. 122
125
131
133
% 136
. 146
\d matches digits. This pattern is same as [0-9].
\D matches non-digits. This pattern is same as [^0-9].
\s matches space characters and \S is negation of it. Try and see.
Enter regex pattern
i - Ignore Case
g - Global Match
m - Multiline
s - Dot All
u - Unicode
y - Sticky
With lastIndex^?
/\d+/gCount:9
Lenovo Z6 Pro, releasing on 23rd April, has Snapdragon 855, 12GB of RAM, 4 cameras and a 4045 mAh battery. It'll cost $800.85 after a 15% discount.
match position
6 8
23 28
855 55
12 60
4 73
4045 89
800 119
85 123
15 134
Enter regex pattern
i - Ignore Case
g - Global Match
m - Multiline
s - Dot All
u - Unicode
y - Sticky
With lastIndex^?
/\D+/gCount:10
Lenovo Z6 Pro, releasing on 23rd April, has Snapdragon 855, 12GB of RAM, 4 cameras and a 4045 mAh battery. It'll cost $800.85 after a 15% discount.
match position
Lenovo Z 0
Pro, releasing on 9
rd April, has Snapdragon 30
, 58
GB of RAM, 62
cameras and a 74
mAh battery. It'll cost $ 93
. 122
after a 125
% discount. 136

match	position
Lenovo	0
Z6	7
Pro	10
releasing	15
on	25
23rd	28
April	33
has	40
Snapdragon	44
855	55
12GB	60
of	65
RAM	68
4	73
cameras	75
and	83
a	87
4045	89
mAh	94
battery	98
It	107
ll	110
cost	113
800	119
85	123
after	126
a	132
15	134
discount	138

match	position
	6
	9
,	13
	24
	27
	32
,	38
	43
	54
,	58
	64
	67
,	71
	74
	82
	86
	88
	93
	97
.	105
'	109
	112
$	117
.	122
	125
	131
	133
%	136
.	146

match	position
Lenovo Z	0
Pro, releasing on	9
rd April, has Snapdragon	30
,	58
GB of RAM,	62
cameras and a	74
mAh battery. It'll cost $	93
.	122
after a	125
% discount.	136

match	position
	6
	9
,	13
	24
	27
	32
,	38
	43
	54
,	58
	64
	67
,	71
	74
	82
	86
	88
	93
	97
.	105
'	109
	112
$	117
.	122
	125
	131
	133
%	136
.	146

match	position
	6
	9
,	13
	24
	27
	32
,	38
	43
	54
,	58
	64
	67
,	71
	74
	82
	86
	88
	93
	97
.	105
'	109
	112
$	117
.	122
	125
	131
	133
%	136
.	146