How to check if a string contain specific words?

by

you can use indexOf for this

var a="how are you";
if (a.indexOf('are') > -1) {
  return true;
} else {
  return false;
}

Edit: This is an old answer that keeps getting up votes every once in a while so I thought I should clarify that in the above code, the if clause is not required at all because the expression itself is a boolean. Here is a better version of it which you should use,

var a="how are you";
return a.indexOf('are') > -1;

Update in ECMAScript2016:

var a="how are you";
return a.includes('are');  //true

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