If (Condition == Any Array Value) In JavaScript [duplicate]

Question

So I'm trying to make a if statement with many possibilities, but what ended up happening is now I have WAY too many || in my if.

I thought maybe it would be possible to throw all of the possible values into a array, and then only do condition == array or something.

Anyway here's my code. Please help. Thanks in advance.

<body> <input id="userInput"> <button onclick="Submit()">Submit</button> <script> function Submit() { var input = document.getElementById("userInput").value; if (input == "random text" || input == 3 || input == "more random text" || input == false || input == "another random string.") { // Do Something } </script> </body>

typeof input will always be "string". You'll never get array or boolean or anything else. — Jeremy Thille
– Jeremy Thille, Commented Apr 9, 2018 at 11:45
You can check for indexOf w3schools.com/jsref/jsref_indexof.asp — Irfan
– Irfan, Commented Apr 9, 2018 at 11:47
Very similar: stackoverflow.com/questions/5864408/javascript-is-in-array — Takit Isy
– Takit Isy, Commented Apr 9, 2018 at 12:36

Kristianmitk · Accepted Answer · 2018-04-09 11:49:31Z

You can use Array#includes or Array#indexOf and check wether the input is included in your array where you whitelist allowed strings (or other types - depending on your input type)

Demo with includes

let arr = ['random text', '3', 'more random test', 'lorem ipsum']; function submit() { input = document.getElementById("userInput").value; if(arr.includes(input)) { alert('yaaay that was easy'); } }

<input id="userInput"> <button onclick="submit()">Submit</button>

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