Nodejs String Include includes(substring)

Method Source Code

String.prototype.includes = function(substring){
  return this.indexOf(substring) > -1 ? true : false;
}

Related

1. includeString(search, start, caseSensitive, eachOther)

   String.prototype.includeString = function (search, start, caseSensitive, eachOther) {
     'use strict';
     caseSensitive = caseSensitive === void 0 ? false : !!caseSensitive;
     eachOther = eachOther === void 0 ? false : !!eachOther;
     if (caseSensitive) {
       return this.includes(search, start);
     if (typeof start !== 'number') {
       start = 0;
   ...
   

2. includes( other )

   String.prototype.includes = function( other ){
     return !!other && this.indexOf( other) != -1
   function str_includes( that, other ){
     return !!other && that.indexOf( other) != -1
   

3. includes()

   String.prototype.includes = function () {
       'use strict';
       return String.prototype.indexOf.apply(this, arguments) !== -1;
   };
   

4. includes(matcher)

   String.prototype.includes = function(matcher) {
     var includes = false;
     if( this.indexOf( matcher ) > 0 ) {
       includes = true;
     return includes;
   

5. includes(string, index)

   String.prototype.includes = function (string, index) {
     if (typeof string === 'object' && string instanceof RegExp) 
        throw new TypeError("First argument to String.prototype.includes must not be a regular expression");
     return this.indexOf(string, index) !== -1;
   };
   

6. includes(val, from)

   String.prototype.includes = function(val, from) {
       return this.indexOf(val, from) !== -1;