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JavaScript Array includes method


In JavaScript, we use an array include() function to see if an array contains an element. If an array contains an element, the JavaScript includes() function returns true. Else, false is returned.

Syntax


array.includes(element, start)

ParameterDescription
elementRequired - The value to look for.
startOptional - Its a start position, default value is 0.

Lets take an example of include function which returns true.


let alphabets = ['A', 'B', 'C', 'D']
console.log(alphabets.includes('B'))

Output

true


Lets take an example of include function which returns false.


let alphabets = ['A', 'B', 'C', 'D']
console.log(alphabets.includes('E'))

Output

false