Array 'includes' method in Javascript (Array.prototype.includes)

Through the use of the .includes() method in Javascript, you can test whether or not a value exists in an array.

For a while now we've all been waiting for this to become a built in feature with Javascript and it is nice to finally see that happen without the use of external libraries or extending the prototype.

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[athraafaraj]

and if we use bob (small letter) not the same in the array, git false, how we can make it true with bob -small letter