Clear text field value in JQuery

Javascript Problem Overview

I understand this is an easy question but for some reason this just isn't working for me. I have a function that is triggered everytime a drop down menu is changed. Here is the relevant code that is suppose to grab the current value of the text field, if a value exists, clear it that is contained within the .change function:

var doc_val_check = $('#doc_title').attr("value");
	if (doc_val_check.length > 0) {
		doc_val_check == "";
	}

I feel like I am missing something very simple.

Javascript Solutions

Solution 1 - Javascript

doc_val_check == "";   // == is equality check operator

should be

doc_val_check = "";    // = is assign operator. you need to set empty value

                       // so you need =

You can write you full code like this:

var doc_val_check = $.trim( $('#doc_title').val() ); // take value of text 
                                                     // field using .val()
    if (doc_val_check.length) {
        doc_val_check = ""; // this will not update your text field
    }

To update you text field with a "" you need to try

$('#doc_title').attr('value', doc_val_check); 
// or 
$('doc_title').val(doc_val_check);

But I think you don't need above process.

###In short, just one line

$('#doc_title').val("");

###Note

.val() use to set/ get value in text field. With parameter it acts as setter and without parameter acts as getter.

Solution 2 - Javascript

If you want to clear the text field, use:

$('#doc_title').val("");

Solution 3 - Javascript

Instead of all those:

$('#doc_title').attr("value", "");

Solution 4 - Javascript

What you need is:

if ($('#doc_title').val()) {
  $('#doc_title').val('');
}

Solution 5 - Javascript

In simple way, you can use the following code to clear all the text field, textarea, dropdown, radio button, checkbox in a form.

function reset(){
    $('input[type=text]').val('');	
    $('#textarea').val('');	
    $('input[type=select]').val('');
    $('input[type=radio]').val('');
    $('input[type=checkbox]').val('');	
}

Solution 6 - Javascript

you can clear it by using this line

$('#TextBoxID').val("");

Solution 7 - Javascript

If you are using jQuery, then you can use this:

// var doc_val_check = $('#doc_title').val(); - No need of this!
if ($('#doc_title').val().length > 0) {
    $('#doc_title').val("");
}

Solution 8 - Javascript

We can use this for text clear

$('input[name="message"]').val("");

Solution 9 - Javascript

For the most part you just set the .val() method. All of the answers are pretty accurate, just wanted to post my results to anyone who may need to set the value via the client id that gets rendered.

 $('#' + '<%= doc_title.ClientID %>').val(null);

Solution 10 - Javascript

You are comparing doc_val_check with an empty string. You want to assign the empty string to doc_val_check

so it should be this:

doc_val_check = "";

Solution 11 - Javascript

Use jQuery.prototype.val to get/set field values:

var value = $('#doc_title').val();    // get value
$('#doc_title').val('');    // clear value

Solution 12 - Javascript

> >

Solution 13 - Javascript

$('#[element id]').val(null);

$('.[element class]').val(null);

Solution 14 - Javascript

If you want to have element with visible blank text just do this:

$('#doc_title').html('&nbsp;');

Solution 15 - Javascript

Try using this :

function checkValue(){
  var value = $('#doc_title').val();
  if (value.length > 0) {
        $('#doc_title').val("");
        $('#doc_title').focus();  // To focus the input 
    }
    else{
    //do something
    }
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<body>
<input type="text" id="doc_title" value="Sample text"/>
<button onclick="checkValue()">Check Value</button>
</body>

Content Type	Original Author	Original Content on Stackoverflow
Question	Yuschick	View Question on Stackoverflow
Solution 1 - Javascript	thecodeparadox	View Answer on Stackoverflow
Solution 2 - Javascript	thebiffboff	View Answer on Stackoverflow
Solution 3 - Javascript	Tooraj Jam	View Answer on Stackoverflow
Solution 4 - Javascript	xdazz	View Answer on Stackoverflow
Solution 5 - Javascript	Sankar	View Answer on Stackoverflow
Solution 6 - Javascript	Kamran Khan	View Answer on Stackoverflow
Solution 7 - Javascript	Praveen Kumar Purushothaman	View Answer on Stackoverflow
Solution 8 - Javascript	Asad Ali	View Answer on Stackoverflow
Solution 9 - Javascript	cking24343	View Answer on Stackoverflow
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Solution 15 - Javascript	trickymind	View Answer on Stackoverflow