Javascript Regular Expression - Brackets (Examples)

var str = "Fallinfo";
var patt = /[fi]/g;
var str = x.match(patt);

// OUTPUT - i,f

// [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

var str = "Fallinfo";
var patt = /[^F]/g;
var x = str.match(patt);

// OUTPUT - a,l,l,i,n,f,o

// [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

var str = "123456789";
var patt = /[1-4]/g;
var x = str.match(patt);

// OUTPUT - 1, 2, 3, 4;

var str = "123456789";
var patt = /[^1-4]/g;
var x = str.match(patt);

// OUTPUT - 5, 6, 7, 8, 9;

var str = "Fallinfo 123";
var patt = /(fo|i|2)/g;
var x = str.match(patt);

// OUTPUT - i, fo, 2;