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ES6 - New String Method includes()
The method determines if a string is a substring of the given string.
Syntax
str.includes(searchString[, position])
Parameters
searchString − The substring to search for.
Position − The position in this string at which to begin searching for searchString; defaults to 0.
Return Value
true if the string contains the substring ; otherwise, false.
Example
var str = 'Hello World';
console.log(str.includes('hell'))
console.log(str.includes('Hell'));
console.log(str.includes('or'));
console.log(str.includes('or',1))
Output
false true true true
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