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Assign dynamic value to an Input Field in HTML

I have an input field and I want to assign it a value dynamically fetched from DB. I will use that value later in a script. Here is my code below
<div data-ng-model="DashboardCounterItems">
<div data-ng-repeat="cItem in DashboardCounterItems">
<input type ="hidden" id ="myInput" value = {{cItem.dbMeetings.length}} />
</div>
</div>
Here {{cItem.dbMeetings.length}} is fetched from DB and assigned to myInput. Further when I check the value of this input in alert in script below, I get {{cItem.dbMeetings.length}} message instead of the value within it.
<script>
var iLenthv = document.getElementById("myInput").value;
alert(iLenthv);
</script>
Any help how can I do it. Or any other better way. I will really appreciate it.

I think your JS code will execute before DB data retrieval, can you check JS code within the setTimeout() Method?
<script>
setTimeout(function() {
var iLenthv = document.getElementById("myInput").getAttribute("value");
alert(iLenthv);
}, 3000);
</script>

Use .getAttribute() to get the value from a html attribute
function myFunction() {
var iLenthv = document.getElementById("myInput").getAttribute("value");
alert(iLenthv);
}
Hope it's helpfull

So we have to track the client side actual value, after the document is loaded. Would you adapt this piece of code and take a look at the console ?
<div data-ng-model="DashboardCounterItems">
<div data-ng-repeat="cItem in DashboardCounterItems">
<input type="hidden" id="myInput" value={{cItem.dbMeetings.length}} />
</div>
</div>
<script>
const test = () => {
var iLenthv = document.getElementById("myInput").value;
console.log("value:",iLenthv);
};
window.onload = test;
</script>

Javascript: I cant get a textbox to display a value updated on the client side

I'm trying to simply have a button update the contents of ah HTML textbox (on the client side).
Clicking the button fires the updateBox() method fine. Stepping through the code, I can see the text1.value field update fine but the text1 does not seem to get updated by changes to the dom.
Am I mistaken to think that you can do updates on the client side only by modifying dom data?
<input type=text name="text1" value="100"/>
<button name="but1" id="but1" onclick="updateBox" >clickme!</button>
<script type="text/javascript" >
var text1 = document.getElementsByName('text1');
function updateBox() {
//text1.value = "22"; <----tried this way, no good either :(
text1.innerHTML = "99";
}
</script>

Few things:
onclick="updateBox" should be onclick="updateBox()"
var text1 = document.getElementsByName('text1'); should be var text1 = document.getElementsByName('text1')[0]; (note the [0])
text1.value = "22"; is the one to use
jsFiddle example

Try use below,
var text1 = document.getElementsByName('text1')[0];
function updateBox() {
text1.value= "99";
}
Ref: https://developer.mozilla.org/en-US/docs/Web/API/document.getElementsByName

Thanks for everyone's responses.
With your advice I got the button to update. I appreciate the advice on how to implement the function correctly. This was just a test so I didn't pay much attention.
1) I had to use: onclick="updateBox" rather than "updateBox() in the button HTML because "updateBox" caused the event to fire with out clicking the button.
2) Big thanks for pointing out that I was referencing a collection instead of an item in the collection. Had to use: var tb1 = document.getElementsByName('tb1')[0];
3) For some reason the box would not update when I used:tb1.innerHTML = "99";
This worked: tb1.value = "99";

text1[0].innerHTML = "99"
Use innerHTML instead of value

try passing the variable to your function instead of declaring it outside of your function.
<input type=text name="text1" value="100"/>
<button name="but1" id="but1" onclick="updateBox('text1',99)" >clickme!</button>
<script type="text/javascript" >
function updateBox(t,v) {
var tv = document.getElementsByName(t)[0];
tv.value = v;
}
</script>

Showing characters while typing

I need to see characters while I am typing characters inside an input, and I want to achieve this the simplest way. I have tried the following way, but it is not working. I am more interested to know what I am doing wrong rather than to get a script.
<input type='text' id='inpt' />
<script>
var getText = document.getElementById("inpt");
document.write(getText);
</script>

You're thinking of a callback, or event handler. Typically you would use onkeyup=callback_name(), and callback_name() would write to the element you want the output to appear in.
<script type="text/javascript">
function callback()
{
var text = document.getElementById('input').value;
document.getElementById('output').innerHTML = text;
}
</script>
<input type='text' id='input' onkeyup='callback()' />
<div id="output"></div>

How to clear a text field?

I want to place a cross button next to a text field, which, on clicking it, clears the value entered by the user. In other words, it empties the field. Please help..
And I also want to focus the field, but after some 2 or 3 seconds..

Like this:
$('#myButton').click( function () {
$('#myField').val('');
});
Or without jQuery
document.getElementById('myButton').onclick = function () {
document.getElementById('myField').value = '';
});

Try this,
$('#button').click(function(){
$('#inputBox').val('');
});

Have you tried anything at all? But this should do (edit after misread, see below):
$('#your_button').click(function() { $('#your_textbox').val(''); });

In Javascript:
document.getElementById('textField1').value = "";

Well, learn to break your tasks into smaller one and everything will become much easier. Here, for example, you have 2 tasks:
1) Place a "X" button near input. This is achieved by CSS and HTML. You HTML might look like:
Then you should align your image with you input
2) Actual erasing. In jQuery:
$("#x_button").click( function() {
$("#input_id").val( "" );
});
But this is real basics of web development, so you should really consider to read some kind of book on it.

You can do it with html5 value.
<input type="text" placeholder="Your text here">

Assuming your text field looks like this one :
<input type="text" id="myText"></input>
and your button looks like this one :
<input type="button" id="myButton"></input>
You just have to do this in javascript :
<script type="text/javascript">
var myButton = document.getElementById('myButton');
myButton.addEventListener("click", function () {
document.getElementById('myText').value = '';
}, false);
</script>
If you're using jQuery it's even easier :
<script type="text/javascript">
$('#myButton').click(function() {
$('#myText').val('');
});
</script>

here is a sample:
Html:
<input type="text" id="txtText" value="test value" />
<input type="button" id="btnClear" value="Clear" />
javascript:
$(document).ready(function () {
$("#btnClear").click(ClearText);
});
function ClearText() {
$("#txtText").val("");
}

Javascript Form Submit Failure

I have code on my website that isn't working, and I haven't been able to figure out why...
Here is the code:
if (self.location.href == top.location.href) {
document.fastform.submit();
document.getElementById(fastform).submit();
}
Now if I put something other than a form submit into the if statement, it works just fine. It's just when I do the form submit code it never works...
Here is the form code:
<form id="fastform" name="fastform" ACTION="/amember.php">
<INPUT TYPE="text" NAME="myurl" ID="myurl">
<input type="submit" />
</form>
Thanks for the help guys!
So far none of the suggestions work, I have tried several different variations like putting quotes around the fastform in getelementbyid. Here is my entire javascript program:
<script type="text/javascript">
function geturl() {
var locate = document.location
document.fastform.myurl.value = locate
}
window.onload = geturl;
if (self.location.href == top.location.href) {
var f=document.forms.fastform; f.submit();
}
</script>
Thanks for the suggestions!
Okay, so using some of the suggested code here I got it working. The problem was the if statement was not being executed at the right time, I moved things around so that the if statement was executed LAST and everything started working. Here is the complete (functioning) code:
<script type="text/javascript">
function geturl() {
var locate = document.location
document.fastform.myurl.value = locate
getmeoutofhere()
}
window.onload = geturl;
function getmeoutofhere() {
if (self.location.href == top.location.href) {
document.getElementById('fastform').submit();
}
}
</script>
<form id="fastform" name="fastform" ACTION="/amember.php" style="visibility:hidden;">
<INPUT TYPE="text" NAME="myurl" ID="myurl" />
<input type="submit" />
</form>

You can use this in your function:
var f=document.forms.fastform;
f.submit();
and it's working completely fine

document.getElementById('fastform').submit();
OR
var frm = document.getElementById('fastform');
frm.submit();

I'm not sure if it's the problem, but there's certainly one problem with the line:
document.getElementById(fastform).submit();
The problem, I think, is that you're trying to get an element by its id, but getElementById() requires a quoted string, unless you've already assigned the string to the variable represented by fastform. Therefore it should be either:
document.getElementById('fastform').submit();
or:
var fastform = 'fastform';
document.getElementById(fastform).submit();
Further, you seem to be trying to work with the fastform variable before it seems to have been set, in the first line contained within the if statement:
document.fastform.submit();
I'd suggest amending your script a little, to be something like:
if (self.location.href == top.location.href) {
var fastform = document.getElementById('fastform');
fastform.submit();
}
References:
document.getElementById().