- Use the spread operator (...) and Array.prototype.reverse() to reverse the order of the characters in the string.
- Combine characters to get a string using String.prototype.join('').
//#Source https://bit.ly/2neWfJ2 const reverseString = str => [...str].reverse().join(''); console.log(reverseString('php')); console.log(reverseString('foobar'));
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ECMAScript 6 introduced String.prototype.includes:
const string = "foo"; const substring = "oo"; console.log(string.includes(substring));
includes doesn't have Internet Explorer support, though. In ECMAScript 5 or older environments, use String.prototype.indexOf, which returns -1 when a substring cannot be found:
var string = "foo"; var substring = "oo"; console.log(string.indexOf(substring) !== -1);
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