string length condition not working for webhook

Question

I'm still new to JavaScript but I wrote a small script that sends messages to a webhook. Which works great, but now I need to set some conditions to it before it may execute. The condition I wanted to set here was that the field "name" has to have a minimal length of 9 characters. I just can't find the fault in this if statement.

function json()
{
  if(document.getElementById('name').length >= 9)
  { 
    var msgJson = {
      "text": "success",
    };
  send(msgJson);
  }
}

Does anyone have the answer for me?
Thanks in advance!

Is this an input field? You need to chain a .value onto the end of the getElementById statement. — Dan Zuzevich
– Dan Zuzevich, Commented Oct 14, 2017 at 0:49
Yes it's a text input field in a form. So if I set it to .value, how can I chek the input character amount? Cause the input can be for example "peter" and than the condition of 9 characters is not met. — Anton van Elburg
– Anton van Elburg, Commented Oct 14, 2017 at 0:58

Martin Adámek · Accepted Answer · 2017-10-14 00:53:37Z

2

document.getElementById('name') returns HTML element reference. If you want to check the length of that input value (<input id="name">), then you need to use document.getElementById('name').value and check the length of it, like this:

function json() {
    var el = document.getElementById('name');
    if (el.value.length >= 9) {
        var msgJson = {
            "text": "succes",
        };
        send(msgJson);
    }
}

answered Oct 14, 2017 at 0:53

Martin Adámek

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Derek Brown · Accepted Answer · 2017-10-14 00:47:12Z

0

The getElementById() function returns an Element object (source). This has no .length property- so you are going to get an error.

answered Oct 14, 2017 at 0:47

Derek Brown

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