Nodejs Utililty Methods String Contains

String.prototype.contains = function(matcher) {
  const regex = new RegExp(matcher, 'i')
  return regex.test(this)

String.prototype.contains = function(needle) {
    return this.indexOf(needle) >= 0;
};

String.prototype.contains = function (obj) {
    return this.indexOf(obj) >= 0;
};

String.prototype.contains = function(pStr) {
  return this.indexOf(pStr) > -1;
};
String.prototype.doUpperCase = function(pBeginIndex, pLength) {
  pLength = pLength || 1;
  return this.substring(pBeginIndex, pLength).toUpperCase() + this.substring(pBeginIndex + pLength);
};
String.prototype.doLowerCase = function(pBeginIndex, pLength) {
  pLength = pLength || 1;
...

String.prototype.contains = function (palavra) {
  let indice = this.trim().indexOf(palavra);
  return indice >= 0;

String.prototype.contains = function(pattern) {
  return this.indexOf(pattern) !== -1;
};

String.prototype.contains = function(pattern) {
    return this.indexOf(pattern.canonize())>=0;
};

String.prototype.contains = function(s) {
  return this.indexOf(s) >= 0;
};

String.prototype.contains = function(s){
    return this.indexOf(s) != -1;
};

String.prototype.contains = function(s){
   return (this.indexOf(s)!=-1);