JavaScript.. The code module file, p3-module.js, will contain the following four functions.validDenomination(coin):• Returns true if the coin function parameter is a valid coin value of either 1, 5, 10, 25, 50, or 100• Must use the array indexOf() method, and !== equality operator• This function can be coded to be a single line of codevalueFromCoinObject(obj):• Returns the calculated value of a single coin object from the obj function parameter• Must use object deconstruction to create constant variables denom and count from the obj function parameter,using default object values of 0 for denom and countvalueFromArray(arr):• Iterates through an array of coin objects and returns the final calculated value of all coin objects• Must use Array.reduce() method, and an arrow function with the Array.reduce() method• Must call valueFromCoinObject()• Extra credit: Handle scenario where the arr function parameter, rather than an array of coin objects, containsanother array of coin objectscoinCount(.coinage):• This function is the only exported function from the code module• Calls and returns the result of valueFromArray() function, which will be the value of all coin objects with the coinagearray function parameter Create and test each of the four functions:• The functions are listed in the recommended order for development.• The first two functions can be tested individually.• The last two functions depend on other functions and should be coded last.• Initially, code each function using whatever technique works, then refactor the functions to meet the specificrequirements.• Test the code module using the following console.log() statements:console.log("{}", coinCount({denom: 5, count: 3}):console.log("{}s", coinCount{{denom: 5, count: 3},(denom: 10, count: 2});const coins = [[denom: 25, count: 2),(denom: 1, count: 7}];:console.log(.[{]", coinCount(.coins);console.log("[{}]", coinCount(coins); / Extra credit

Question

JavaScript.. The code module file, p3-module.js, will contain the following four functions.validDenomination(coin):• Returns true if the coin function parameter is a valid coin value of either 1, 5, 10, 25, 50, or 100• Must use the array indexOf() method, and !== equality operator• This function can be coded to be a single line of codevalueFromCoinObject(obj):• Returns the calculated value of a single coin object from the obj function parameter• Must use object deconstruction to create constant variables denom and count from the obj function parameter,using default object values of 0 for denom and countvalueFromArray(arr):• Iterates through an array of coin objects and returns the final calculated value of all coin objects• Must use Array.reduce() method, and an arrow function with the Array.reduce() method• Must call valueFromCoinObject()• Extra credit: Handle scenario where the arr function parameter, rather than an array of coin objects, containsanother array of coin objectscoinCount(.coinage):• This function is the only exported function from the code module• Calls and returns the result of valueFromArray() function, which will be the value of all coin objects with the coinagearray function parameter> Create and test each of the four functions:• The functions are listed in the recommended order for development.• The first two functions can be tested individually.• The last two functions depend on other functions and should be coded last.• Initially, code each function using whatever technique works, then refactor the functions to meet the specificrequirements.• Test the code module using the following console.log() statements:console.log(&#34;{}&#34;, coinCount({denom: 5, count: 3}):console.log(&#34;{}s&#34;, coinCount{{denom: 5, count: 3},(denom: 10, count: 2});const coins = [[denom: 25, count: 2),(denom: 1, count: 7}];:console.log(.[{]&#34;, coinCount(.coins);console.log(&#34;[{}]&#34;, coinCount(coins); / Extra credit

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