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RegExp()

20157

RegExp

JavaScript 

const regex1 = /\w+/;
const regex2 = new RegExp("\\w+");

console.log(regex1);
// /\w+/

console.log(regex2);
// /\w+/

console.log(regex1 === regex2);
// false

js
new RegExp(pattern)
new RegExp(pattern, flags)
RegExp(pattern)
RegExp(pattern, flags)

pattern

ES5 RegExp RegExp

flags

flags

flags (lastIndex 0)( ES2015 )

flags flags( lastIndex )

flags

g

i

u Unicode

m

^ $*\n\r

s

.

uunicode

pattern Unicode

y

lastIndex

RegExp .

js
/ab+c/i;
new RegExp(/ab+c/, "i"); // 
new RegExp("ab+c", "i"); //

new RegExp('ab+c') ()

ECMAScript 2027 LanguageSpecification
# sec-regexp-constructor

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2026812 MDN

GitHub
  1. JavaScript
  2. RegExp
    1. RegExp()
    1. escape()
    1. RegExp.$1-$9
    2. RegExp.input ($_)
    3. RegExp.lastMatch ($&)
    4. RegExp.lastParen ($+)
    5. RegExp.leftContext ($`)
    6. RegExp.rightContext ($')
    7. RegExp[Symbol.species]
    1. RegExp.prototype.compile()
    2. RegExp.prototype.exec()
    3. RegExp.prototype.test()
    4. RegExp.prototype.toString()
    5. RegExp.prototype[Symbol.match]()
    6. RegExp.prototype[Symbol.matchAll]()
    7. RegExp.prototype[Symbol.replace]()
    8. RegExp.prototype[Symbol.search]()
    9. RegExp.prototype[Symbol.split]()
    1. RegExp.lastIndex
    2. RegExp.prototype.dotAll
    3. RegExp.prototype.flags
    4. RegExp.prototype.global
    5. RegExp.prototype.hasIndices
    6. RegExp.prototype.ignoreCase
    7. RegExp.prototype.multiline
    8. RegExp.prototype.source
    9. RegExp.prototype.sticky
    10. RegExp.prototype.unicode
    11. unicodeSets
  9. Object/Function
    1. Function.prototype.apply()
    2. Function.prototype.bind()
    3. Function.prototype.call()
    4. Function.prototype.toString()
    5. Function.prototype[Symbol.hasInstance]()
    1. Function.displayName
    2. Functionlength
    3. Function.name
    4. Function.prototype.prototype
    5. Function.prototype.arguments
    6. Function.prototype.caller
    1. Object.prototype.__defineGetter__()
    2. Object.prototype.__defineSetter__()
    3. Object.prototype.__lookupGetter__()
    4. Object.prototype.__lookupSetter__()
    5. Object.prototype.hasOwnProperty()
    6. Object.prototype.isPrototypeOf()
    7. Object.prototype.propertyIsEnumerable()
    8. Object.prototype.toLocaleString()
    9. Object.prototype.toString()
    10. Object.prototype.valueOf()
    1. Object.prototype.__proto__
    2. Object.prototype.constructor
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