CODEWITHSUNDEEP
javascriptarrays
SAGEof6iIxPATHS
SAGEof6iIxPATHS

Reputation: 33

Uncaught TypeError: Array.prototype.indexOf called on null or undefined

Why am I getting this error? Error from the chrome's console...

Uncaught TypeError: Array.prototype.indexOf called on null or undefined
    at indexOf (<anonymous>)
    at Function.c.inArray (zepto.js:2)
    at HTMLDivElement.<anonymous> (index.html:97)
    at HTMLDivElement.j (zepto.js:2)
c.inArray @ zepto.js:2
(anonymous) @ index.html:97
j @ zepto.js:2

And this is the code on and after the 97th line.

if ($.inArray($("#recipient-email").val(), recipientList) == -1) {
    recipientList.push($("#recipient-email").val());

                localStorage.setItem(
                  "recipient-list",
                  JSON.stringify(recipientList)
                );

Upvotes: 3

Views: 1241

Answers (1)

AlexZeDim
AlexZeDim

Reputation: 4352

It seems that your code is fine, but the problem is at another point. As I see, you are using jQuery and sometimes it doesn't parse / grab results from "#recipient-email" div or so.

But it also doesn't return an empty array of Array.prototype itself and as a result, any Array.prototype method will return you the following error.

You should add some code for handling such scenario, like:

I don't know in which variable your array is stored, but I guess you would understand my logic.

if ($.inArray($("#recipient-email").val(), recipientList) === null) {
  $.inArray($("#recipient-email").val(), recipientList) === []
}

Upvotes: 2

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