Expressão Regular

Sintaxe

NamesRegexp
FLAGSg, i, m, u, y
CHARACTER CLASSES. , \d, \D, \w, \W, \s, \S, \
CHARACTER SET[], [^]
BOUNDARIES^, $, \b, \B
ALTERNATION`
GROUPING AND BACK REFERENCES(), \n, (?:x)
QUANTIFIERSGreedy (*, +, ?, {n}, {n,}, {n, m}), Non-Greedy (x*?, x+?, x??, x{n}?, x{n,}?, x{n,m}?)
ASSERTIONSx(?=y), x(?!y)

Padrões

Byte

/[01]8/

01010101
11110000
11110002
01010101
11110000
11110002
const pattern = /[01]{8}/;
console.log(pattern.test('01010101')); //=> true
console.log(pattern.test('11110000')); //=> true
console.log(pattern.test('11110002')); //=> false
const pattern = /[01]{8}/;
console.log(pattern.test('01010101')); //=> true
console.log(pattern.test('11110000')); //=> true
console.log(pattern.test('11110002')); //=> false

CPF

/^(\d11|\d3.\d3.\d3-\d2)$/

11122233344
111.222.333-44
111x222.333-44
1112223334
111222333440
11122233344X
11122233344
111.222.333-44
111x222.333-44
1112223334
111222333440
11122233344X
const pattern = /^(\d{11}|\d{3}\.\d{3}\.\d{3}-\d{2})$/;
console.log(pattern.test('11122233344')); //=> true
console.log(pattern.test('111.222.333-44')); //=> true
console.log(pattern.test('111x222.333-44')); //=> false
console.log(pattern.test('1112223334')); //=> false
console.log(pattern.test('111222333440')); //=> false
console.log(pattern.test('11122233344X')); //=> false
const pattern = /^(\d{11}|\d{3}\.\d{3}\.\d{3}-\d{2})$/;
console.log(pattern.test('11122233344')); //=> true
console.log(pattern.test('111.222.333-44')); //=> true
console.log(pattern.test('111x222.333-44')); //=> false
console.log(pattern.test('1112223334')); //=> false
console.log(pattern.test('111222333440')); //=> false
console.log(pattern.test('11122233344X')); //=> false

CEP

/^(\d8|\d2\.?\d3-\d3)$/

01001000
01001-000
01.001-000
a01001000
01-001.000
01.001000
01001000
01001-000
01.001-000
a01001000
01-001.000
01.001000
const pattern = /^(\d{8}|\d{2}\.?\d{3}-\d{3})$/;
console.log(pattern.test('01001000')); //=> true
console.log(pattern.test('01001-000')); //=> true
console.log(pattern.test('01.001-000')); //=> true
console.log(pattern.test('a01001000')); //=> false
console.log(pattern.test('01-001.000')); //=> false
console.log(pattern.test('01.001000')); //=> false
const pattern = /^(\d{8}|\d{2}\.?\d{3}-\d{3})$/;
console.log(pattern.test('01001000')); //=> true
console.log(pattern.test('01001-000')); //=> true
console.log(pattern.test('01.001-000')); //=> true
console.log(pattern.test('a01001000')); //=> false
console.log(pattern.test('01-001.000')); //=> false
console.log(pattern.test('01.001000')); //=> false

Aplicação

RegExp.prototype.test()

let message = 'ifpb';
let pattern = /\w+/;
console.log(pattern.test(message)); //=> true
let message = 'ifpb';
let pattern = /\w+/;
console.log(pattern.test(message)); //=> true

String.prototype.split()

let message = 'lorem ipsum\ndolor';
let pattern = /\s/g;
console.log(message.split(pattern))[('lorem', 'ipsum', 'dolor')];
let message = 'lorem ipsum\ndolor';
let pattern = /\s/g;
console.log(message.split(pattern))[('lorem', 'ipsum', 'dolor')];

HTML input pattern

<input type="text" pattern="\d{5}-\d{3}" />
<input type="text" pattern="\d{5}-\d{3}" />

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