Typescript regular expression use

console.log('ts debug');
let regex = new RegExp('ttt','i');  //i Modifier   It's not size sensitive 
console.log(regex.test('test/ttt/a'));
console.log(new RegExp(/abc/ig,'i').flags);
// Regular u Modifier usage 
// The treatment is greater than \uFFFF Of Unicode character 
console.log(/^\uD83D/u.test('\uD83D\uDC2A'));//false // Correctly identify 
console.log(/^\uD83D/.test('\uD83D\uDC2A'));//true  No addition u Modifier   Error identification , Only recognize the previous character 
//. Modifier 
console.log(/^.$/.test('𠮷'));//false    No addition u Modifications are considered 2 Characters   . Match all single characters   Except for special characters   \n \r  Row separation    Segment separation    (U+000A   U+000D U+2028 U+2029)
console.log(/^.$/u.test('𠮷'));//true    Add u Modifier    Correctly identify 
//Unicode Character test 
console.log(/\u{61}/.test('a'));
console.log(/\u{61}/u.test('a'));// Add u Correctly identify unicode character   \u{61}
console.log(/\u{20BB7}/u.test('𠮷'));// Add u Correctly identify unicode character   \u{20BB7}

console.log(' Quantifier recognition ', /K{5}/.test('KKKKK')); // Quantifier recognition 
console.log( ' Quantifier recognition ',/K{5}/u.test('KKKKK')); // Quantifier recognition 

console.log(' Quantifier recognition ', /𠮷{5}/.test('𠮷𠮷𠮷𠮷𠮷')); // Quantifier recognition 
console.log( ' Quantifier recognition ',/𠮷{5}/u.test('𠮷𠮷𠮷𠮷𠮷')); // Quantifier recognition 

console.log(/^\S$/.test('𠮷'));//\S  Match all non whitespace characters  /^ Match the beginning of the line    $/ Match the end of the line 
console.log(/^\S$/u.test('𠮷'));//\S  Match all non whitespace characters 

// Use . and s Match all characters, including special characters 
console.log(/aaa.bbb/s.test('aaa\nbbb'));//true  Match correctly to \n Enter special character 
let tmpReg = new RegExp('OOO.KKK','s');
console.log(' Recognize carriage return characters :',tmpReg.test('OOO\nKKK'),'dotAll Pattern :',tmpReg.dotAll,' Use modifier :',tmpReg.flags);

let getCodePointLength=(text)=>{
    let r = text.match(/[\s\S]/gu); //\S  Filter out spaces   \s  Match any whitespace  /g  The global matching  /u  matching Unicode character 
    return r ? r.length : 0 ;
}

console.log( '𠮷𠮷𠮷'.length,getCodePointLength('𠮷𠮷𠮷'));

console.log(/[a-z]/i.test('\u212A'));
console.log(/[a-z]/iu.test('\u212A'));// Add u Modifier can match Unicode character 

console.log(' matching 0-9 Numbers :',/^\d/.test('123456'));

// Adhesion regularity test (sticky)
let str = 'kkk_kk_k';
let p1 = /k+/g;// The global matching   Many times ok character   There is no location requirement 
let p2 = /k+/y;// The global matching  y Modifier requirements must match from the beginning 
console.log(p1.exec(str),p2.exec(str));
console.log(p1.exec(str),p2.exec(str));

let str2 = 'kkk_kk_k';
let p3 = /k+/g;// The global matching   Many times ok character   There is no location requirement 
let p4 = /k+_/y;// The global matching  y Modifier requirements must match from the beginning 
console.log(p3.exec(str2),p4.exec(str2));
console.log(p3.exec(str2),p4.exec(str2));

let _REGEX = /a/g;// The global matching a character 
_REGEX.lastIndex = 2;// From the first... Of the string 2 Two characters to start matching 
const m = _REGEX.exec('baba');
console.log(' Find the matching location :',m.index);
console.log(_REGEX.exec('baba'));//null , Because the last search location was 3, This time from the position 4 Begin your search , Location 4 No characters 

let _REGEX2 = /a/y;// The global matching a character , Match from the start 
_REGEX2.lastIndex = 2;// From the first... Of the string 2 Two characters to start matching 
const m1 = _REGEX2.exec('baba');//null ba Non cohesive    If it is  'baaa'  Continuous adhesion   Just OK
if(m1){
    console.log(' Find the matching location :',m1.index,m1);
}else{
    console.log(' No matching location found :',m1);
}


let _REGEX3 = /a/y;// The global matching a character , Match from the start 
_REGEX3.lastIndex = 3;// From the first... Of the string 2 Two characters to start matching 
const m2 = _REGEX3.exec('baba');//null
if(m2){
    console.log(' Find the matching location :',m2.index);
    console.log(m2);
}

let xa = '@@@abc'.split(/@/y);// Will replace @ Empty string into array  , because y The modifier specifies that the beginning matches 
console.log(xa);//['','','','abc'];

console.log('a#b#c'.split(/#/y));//['a','b','c']

console.log('[email protected]@c'.split(/@/y));//['a','b','c']

console.log('[email protected]@@c'.split(/@/y));//['a','b','c'] //y Identify adhesive , Generate empty elements ''

console.log('a##b#c'.split(/#/y));//['a','b','c']

console.log(new RegExp(/[0-9]*/,'s').test(''));// Add * At least 0 Numbers or infinite numbers , No addition * At least one number 
console.log(new RegExp(/[0-9]/,'s').test('1'));// Add * At least 0 Numbers or infinite numbers , No addition * At least one number 
console.log(new RegExp(/[0-9]{8,16}/,'s').test('12345678'));//{8,16}  least 8 A digital , most 16 A digital 
console.log("======",new RegExp(/[0-9]{8,16}/,'s').test('1234a5678'));//{8,16}  least 8 A digital , most 16 A digital 
console.log(new RegExp(/[0-9]{8,16}/,'s').test('1234567887654321'));//{8,16}  least 8 A digital , most 16 A digital 
console.log(new RegExp(/[a-z]*/,'s').test(''));// Add * At least 0 Lowercase letters or unlimited letters , No addition * At least one letter 
console.log(new RegExp(/[a-z]/,'s').test('a'));// Add * At least 0 Lowercase letters or unlimited letters , No addition * At least one letter 
console.log(new RegExp(/[A-Z]*/,'s').test(''));// Add * At least 0 Lowercase letters or unlimited letters , No addition * At least one letter 
console.log(new RegExp(/[A-Z]/,'s').test('A'));// Add * At least 0 Lowercase letters or unlimited letters , No addition * At least one letter 
console.log(new RegExp(/[a-z]{8,16}/,'s').test('abcdefgh'));//{8,16}  least 8 Lowercase letters , most 16 Lowercase letters 
console.log(">>>>>>",new RegExp(/[a-z]{8,16}/,'s').test('abcdef123ghijop'));//{8,16}  least 8 Lowercase letters , most 16 Lowercase letters 
console.log(new RegExp(/[A-Z]{8,16}/,'s').test('AABBCCDD'));//{8,16}  least 8 Capital letters , most 16 Capital letters 
console.log(new RegExp(/[A-Z]{8,16}/,'s').test('AABBCCDDAABBCCDDDD'));//{8,16}  least 8 Capital letters , most 16 Capital letters 
console.log('ID REGEX:',new RegExp(/[0-9]{6}-\d{8}-\d{4}/,'s').test('000000-00000000-0000'));
console.log('ID REGEX:',new RegExp(/199528-\d{8}-\d{4}/,'s').test('199528-00000000-0000'));
console.log(new  RegExp(/[\da-zA-Z]/,'y').test('*$%'));// At least alphanumeric 
console.log(new  RegExp(/[\da-zA-Z][^*$%#@]/,'y').test('Za'));// One that contains at least alphanumeric , Can not contain *$%#@ These special characters   At least two characters 
console.log('>>>>>>>',new  RegExp(/[0-9][a-z][A-Z]/).test('1qS'));// At least there are numbers , One upper and lower case character 
console.log(' Special character test :',new RegExp(/[^@#$%^&*~!<>=?]/).test('$%^')); // It cannot contain ^@#$%^&*~!<>=? These characters 

// Regular global rules 
let testreg = 'aaabbbcccdddeeefffgggg';
let rep = testreg.replace(/d/ig,'*');// Replace from anywhere 
console.log(rep);
console.log(new RegExp(/d/y,'i').exec(testreg));

console.log(testreg.replace(/a/gy,'%'));// Replace from the beginning 

console.log('n1n2n3n4n5n6'.match(/n\d/y));// Match only the first  //n1   Match the letter + Number combination  n It's followed by numbers   : nx  x-> Numbers 
console.log('n1n2n3n4n5n6'.match(/n\d/gy));// add g Match all  //n1 n2 n3 n4 n5 n6   Match the letter + Number combination  n It's followed by numbers   : nx  x-> Numbers 

const _reg_ex_num = /\d(\+)\d/y;
console.log(_reg_ex_num.test('1+2'));