document.getElementById('input-ID').value - for an input (!) - returns undefined

Asked Apr 23 '20 at 11:06

Active Apr 23 '20 at 12:33

Viewed 24 times

My strength is not in Javascript. My "simple" mountain to climb right now is to get the value of the input! I keep getting "undefined"!

Input element in the form is:

<input name="Address" type="text" maxlength="255"  id="Address" class="required address"  onchange="detectPO();" />

My script so far is:

<script>
function detectPO() { 
    var StreetAddress = document.getElementById('Address').value;
    console.log("You entered: " + StreetAddress);
}
</script>

I've scoured dozens of similar sounding questions on here, and searched on google. I'm really trying. Based on all I've read, this should work, no? But it does not. Tried console in both Chrome and FF.

Can anyone help me? Much appreciation for all efforts.

edited Apr 23 '20 at 12:33

asked Apr 23 '20 at 11:06

Doug Joseph

I think you have to double escape the backslashes in the RegEx constructor. – The fourth bird Apr 23 '20 at 11:07
`"\b"` is a BACKSPACE char. `"\\b"` is a *word boundary*. Use `var RegEx = /^(?:Post(?:al)? (?:Office )?|P[. ]?O\.? )?Box\b/;` – Wiktor Stribiżew Apr 23 '20 at 11:08
he said he is getting the `StreetAddress` is `undefined` – Beingnin Apr 23 '20 at 11:09
Check for duplicate ids. console.log the `document.getElementById('Address')` itself and see whether it is the element you are looking for – Beingnin Apr 23 '20 at 11:11
@NithinChandran: Genius! I had copied an existing form from elsewhere, and based on your tip, I looked, and lo and behold, someone had put matching ID's on the TR's! Unbelievable! I feel sheepish. Trying again. Thank you!! – Doug Joseph Apr 23 '20 at 11:14
@DougJoseph happy to help – Beingnin Apr 23 '20 at 11:19

document.getElementById('input-ID').value - for an input (!) - returns undefined

0 Answers0