JS: RegExp.prototype

RegExp.prototype is the value of the property key "prototype" of the function RegExp.

[see JS: RegExp Object]

console.log(
 RegExp.hasOwnProperty ( "prototype" ) ); // true

Type

Type of RegExp.prototype is object.

[see JS: Value Types]

console.log (
 typeof RegExp.prototype === "object"
); // true

console.log (
 Object.prototype.toString.call( RegExp.prototype ) === "[object Object]" 
); // true

Parent

Parent of RegExp.prototype is Object.prototype.

console.log (
 Reflect.getPrototypeOf ( RegExp.prototype ) === Object.prototype
); // true

[see JS: Prototype and Inheritance]

Purpose

Purpose of RegExp.prototype is to provide methods and properties useful for all regexp instances.

RegExp.prototype is the parent of all RegExp instances.

console.log (
 Reflect.getPrototypeOf ( /abc/ ) === RegExp.prototype
); // true

Properties

Function Properties

1. RegExp.prototype.test
2. RegExp.prototype.exec
3. RegExp.prototype.toString ( )
4. RegExp.prototype [ Symbol.match ] ES2015
5. RegExp.prototype [ Symbol.replace ] ES2015
6. RegExp.prototype [ Symbol.search ] ES2015
7. RegExp.prototype [ Symbol.split ] ES2015

Value Properties

1. RegExp.prototype.source
2. RegExp.prototype.global
3. RegExp.prototype.ignoreCase
4. RegExp.prototype.multiline
5. RegExp.prototype.lastIndex
6. RegExp.prototype.flags ES2015
7. RegExp.prototype.sticky ES2015
8. RegExp.prototype.unicode ES2015

Function Properties

RegExp.prototype [ Symbol.match ]

ECMAScript® 2016 Language Specification#sec-regexp.prototype-@@match

RegExp.prototype [ Symbol.replace ]

ECMAScript® 2016 Language Specification#sec-regexp.prototype-@@replace

RegExp.prototype [ Symbol.search ]

ECMAScript® 2016 Language Specification#sec-regexp.prototype-@@search

RegExp.prototype [ Symbol.split ]

ECMAScript® 2016 Language Specification#sec-regexp.prototype-@@split

Value Properties

[see JS: RegExp Syntax]

Example:

// example of RegExp.prototype value properties

const txt = "love cats";

const regex = new RegExp("cat", "ig");

const result = regex.exec(txt);

// print RegExp properties
console.log ( regex.source === "cat"); // true
console.log ( regex.global);     // true
console.log ( regex.ignoreCase); // true
console.log ( regex.multiline);  // false
console.log ( regex.flags === "gi"); // true

console.log ( regex.lastIndex); // 8

// print result
console.log ( result); // [ 'cat', index: 5, input: 'love cats' ]

RegExp Result Object Properties

// example of RegExp result properties

const myText = 'a x1 X2 c';

const myRe = new RegExp('\\w\\d+', "ig");

const myResult = myRe.exec(myText);

// print result properties

console.log ( myResult.index); // 2
console.log ( myResult.input); // a x1 X2 c