How do I get the value of text input field using J

Question

I am working on a search with JavaScript. I would use a form, but it messes up something else on my page. I have this input text field:

<input name="searchTxt" type="text" maxlength="512" id="searchTxt" class="searchField"/>

And this is my JavaScript code:

<script type="text/javascript">
  function searchURL(){
    window.location = "http://www.myurl.com/search/" + (input text value);
  }
</script>

How do I get the value from the text field into JavaScript?

Answer 1

I would create a variable to store the input like this:

var input = document.getElementById("input_id").value;

And then I would just use the variable to add the input value to the string.

= "Your string" + input;

Answer 2

You should be able to type:

<input name="searchTxt" type="text" maxlength="512" id="searchTxt" class="searchField"/>

<script>
    var input = document.getElementById("searchTxt");

    function searchURL() {
         window.location = "http://www.myurl.com/search/" + input.value;
    }
</script>

I'm sure there are better ways to do this, but this one seems to work across all browsers, and it requires minimal understanding of JavaScript to make, improve, and edit.

Answer 3

Try this one

<input type="text" onKeyup="trackChange(this.value)" id="myInput">
<script>
function trackChange(value)
{

window.open("http://www.google.co.in/search?output=search&q="+value)

}
</script>

Answer 4

//creates a listener for when you press a key
window.onkeyup = keyup;

//creates a global Javascript variable
var inputTextValue;

function keyup(e) {
  //setting your input text to the global Javascript Variable for every key press
  inputTextValue = e.target.value;

  //listens for you to press the ENTER key, at which point your web address will change to the one you have input in the search box
  if (e.keyCode == 13) {
    window.location = "http://www.myurl.com/search/" + inputTextValue;
  }
}

See this functioning in codepen.

Answer 5

Tested in Chrome and Firefox:

Get value by element id:

<input type="text" maxlength="512" id="searchTxt" class="searchField"/>
<input type="button" value="Get Value" onclick="alert(searchTxt.value)">

Set value in form element:

<form name="calc" id="calculator">
  <input type="text" name="input">
  <input type="button" value="Set Value" onclick="calc.input.value='Set Value'">
</form>

https://jsfiddle.net/tuq79821/

Also have a look at a JavaScript calculator implementation: http://www.4stud.info/web-programming/samples/dhtml-calculator.html

UPDATE from @bugwheels94: when using this method be aware of this issue.

Answer 6

Also you can, call by tags names, like this: form_name.input_name.value; So you will have the specific value of determined input in a specific form.