JavaScript RegExp [abc] Expression
Example
Do a global search for the character "h" in a string:
var str = "Is this all there is?";
var patt1 = /[h]/g;
The marked text below shows where the expression gets a match:
Is this all there is?
Try it yourself »
Definition and Usage
The [abc] expression is used to find any character between the brackets.
The characters inside the brackets can be any characters or span of characters:
- [abcde..] - Any character between the brackets
- [A-Z] - Any character from uppercase A to uppercase Z
- [a-z] - Any character from lowercase a to lowercase z
- [A-z ]- Any character from uppercase A to lowercase z
Tip: Use the [^abc] expression to find any character NOT between the brackets.
Browser Support
The [abc] expression is supported in all major browsers.
Syntax
new RegExp("[abc]")
or simply:
/[abc]/
Syntax with modifiers
new RegExp("[abc]","g")
or simply:
/\[abc]/g
More Examples
Example
Do a global search for the characters "i" and "s" in a string:
var str = "Do you know if this is all there is?";
var patt1 = /[is]/gi;
The marked text below shows where the expression gets a match:
Do you know if this is all there is?
Try it yourself »
Example
Do a global search for the character-span from lowercase "a" to lowercase "h" in a string:
var str = "Is this all there is?";
var patt1 = /[a-h]/g;
The marked text below shows where the expression gets a match:
Is this all there is?
Try it yourself »
Example
Do a global search for the character-span from uppercase "A" to uppercase "E":
var str = "I SCREAM FOR ICE CREAM!";
var patt1 = /[A-E]/g;
The marked text below shows where the expression gets a match:
I SCREAM FOR ICE CREAM!
Try it yourself »
Example
Do a global search for the character-span from uppercase "A" to lowercase "e" (will search for all uppercase letters, but only lowercase letters from a to e.)
var str = "I Scream For Ice Cream, is that OK?!";
var patt1 = /[A-e]/g;
The marked text below shows where the expression gets a match:
I Scream For Ice Cream, is that OK?!
Try it yourself »
Example
Do a global, case-insensitive search for the character-span [a-s]:
var str = "I Scream For Ice Cream, is that OK?!";
var patt1 = /[a-s]/gi;
The marked text below shows where the expression gets a match:
I Scream For Ice Cream, is that OK?!
Try it yourself »
Example
A demonstration of "g" and "gi"-search for characters:
var str = "THIS This this";
var patt1 = /[THIS]/g;
var str = "THIS This
this";
var patt1 = /[THIS]/gi;
Try it yourself »
JavaScript RegExp Object
