WellKnownSymbols (WN05)

   1:  const regex = /Java/g;

   2:  regex[Symbol.match] = false;  // Now string.match(regex) treats it not as a regular expression

   3:  const str = 'JavaScript and Java';

   4:  console.log(str.match(regex));  // simple string matching

   5:  // Expected output: Array ["Java"]

   6:  

Symbol.match customizes the behavior of String.prototype.match(). If set to false, it treats the value not as a regular expression.


[ 'Java', 'Java' ]

OR

console.log(str.match(regex));  // simple string matching
                ^
TypeError: 'false' returned for property 'Symbol(Symbol.match)' of object '[object RegExp]' is not a function

WellKnownSymbols context:

ES6 context:

Order a job

Comments ( )