match()

match() : 문자열을 검색(정규식) : 반환(배열)

match() 메서드는 문자열(정규식)을 검색하고 일치하는 결과값을 배열로 반환합니다.

"문자열".match(찾을 문자열, 변경할 문자열)
"문자열".match(정규식)
"문자열".match(정규식, 변경할 문자열)

const str1 = "javascript reference";

const currentStr1 = str1.match('javascript');            //['javascript', index: 0, input: 'javascript reference', groups: undefined]
const currentStr2 = str1.match('reference');            //['reference', index: 11, input: 'javascript reference', groups: undefined]
const currentStr3 = str1.match('r');            //['r', index: 6, input: 'javascript reference', groups: undefined]
const currentStr4 = str1.match(/reference/);            //['reference', index: 11, input: 'javascript reference', groups: undefined]
const currentStr5 = str1.match(/Reference/);            //null
const currentStr6 = str1.match(/Reference/i);            //['reference', index: 11, input: 'javascript reference', groups: undefined]
const currentStr7 = str1.match(/r/g);            //['r','r','r']
const currentStr8 = str1.match(/e/g);            //['e','e','e','e']