How do you automatically set text box to Uppercase?

I am using the following style attribute to set the user input to uppercase so that when the user starts typing in the text box for example railway, then it should be altered to capital letters like RAILWAY without the user having to press the Caps-lock button.

This is the code I am using for the input:

<input type = "text" class = "normal" name = "Name" size = "20" maxlength = "20"> <img src="../images/tickmark.gif" border="0" style='text-transform:uppercase'/>

But I am not getting the desired output by using this attribute.

You've put the style attribute on the <img> tag, instead of the <input>.

It is also not a good idea to have the spaces between the attribute name and the value...

<input type="text" class="normal" 
       name="Name" size="20" maxlength="20" 
       style="text-transform:uppercase" /> 
<img src="../images/tickmark.gif" border="0" />

Please note this transformation is purely visual, and does not change the text that is sent in POST.

I think the most robust solution that will insure that it is posted in uppercase is to use the oninput method inline like:

<input oninput="this.value = this.value.toUpperCase()" />

EDIT

Some people have been complaining that the cursor jumps to the end when editing the value, so this slightly expanded version should resolve that

<input oninput="let p=this.selectionStart;this.value=this.value.toUpperCase();this.setSelectionRange(p, p);" />

The answers with the text-transformation:uppercase styling will not send uppercased data to the server on submit - what you might expect. You can do something like this instead:

For your input HTML use onkeydown:

<input name="yourInput" onkeydown="upperCaseF(this)"/>

In your JavaScript:

function upperCaseF(a){
	setTimeout(function(){
		a.value = a.value.toUpperCase();
	}, 1);
}

With upperCaseF() function on every key press down, the value of the input is going to turn into its uppercase form.

I also added a 1ms delay so that the function code block triggers after the keydown event occured.

UPDATE

Per recommendation from Dinei, you can use oninput event instead of onkeydown and get rid of setTimeout.

For your input HTML use oninput:

<input name="yourInput" oninput="this.value = this.value.toUpperCase()"/>

The problem with the first answer is that the placeholder will be uppercase too. In case you want ONLY the input to be uppercase, use the following solution.

In order to select only non-empty input element, put required attribute on the element:

<input type="text" id="name-input" placeholder="Enter symbol" required="required" />

Now, in order to select it, use the :valid pseudo-element:

#name-input:valid { text-transform: uppercase; }

This way you will uppercase only entered characters.

try

<input type="text" class="normal" 
       style="text-transform:uppercase" 
       name="Name" size="20" maxlength="20"> 
 <img src="../images/tickmark.gif" border="0"/>

Instead of image put style tag on input because you are writing on input not on image

Set following style to set all textbox to uppercase

input {text-transform: uppercase;}

Using CSS text-transform: uppercase does not change the actual input but only changes its look. If you send the input data to a server it is still going to lowercase or however you entered it. To actually transform the input value you need to add javascript code as below:

document.querySelector("input").addEventListener("input", function(event) {
  event.target.value = event.target.value.toLocaleUpperCase()
})

<input>

Here I am using toLocaleUpperCase() to convert input value to uppercase. It works fine until you need to edit what you had entered, e.g. if you had entered ABCXYZ and now you try to change it to ABCLMNXYZ, it will become ABCLXYZMN because after every input the cursor jumps to the end.

To overcome this jumping of the cursor, we have to make following changes in our function:

document.querySelector("input").addEventListener("input", function(event) {
  var input = event.target;
  var start = input.selectionStart;
  var end = input.selectionEnd;
  input.value = input.value.toLocaleUpperCase();
  input.setSelectionRange(start, end);
})

<input>

Now everything works as expected, but if you have slow PC you may see text jumping from lowercase to uppercase as you type. If this annoys you, this is the time to use CSS, apply input: {text-transform: uppercase;} to CSS file and everything will be fine.

The issue with CSS Styling is that it's not changing the data, and if you don't want to have a JS function then try...

<input onkeyup="this.value = this.value.toUpperCase()" />

on it's own you'll see the field capitalise on keyup, so it might be desirable to combine this with the style='text-transform:uppercase' others have suggested.

This will both show the input in uppercase and send the input data through post in uppercase.

HTML

<input type="text" id="someInput">

JavaScript

var someInput = document.querySelector('#someInput');
someInput.addEventListener('input', function () {
    someInput.value = someInput.value.toUpperCase();
});

As nobody suggested it:

If you want to use the CSS solution with lowercase placeholders, you just have to style the placeholders separately. Split the 2 placeholder styles for IE compatibility.

input {
    text-transform: uppercase;
}
input:-ms-input-placeholder {
    text-transform: none;
}
input::placeholder {
    text-transform: none;
}

The below input has lowercase characters, but all typed characters are CSS-uppercased :<br/>
<input type="text" placeholder="ex : ABC" />

<input style="text-transform:uppercase" type = "text" class = "normal" name = "Name" size = "20" maxlength = "20"> <img src="../images/tickmark.gif" border="0"/>

I went with the style text-transform:uppercase thing from poster. Then I just did the uppercase thing in php as well. Some people working too hard with that javascript.

You were close with the style being in the wrong place. You were trying to uppercase an image instead of the input.

$name = strtoupper($_POST['Name']);

I don't know why I wanted to throw in some extra stuff if it's a php page. This is something I like to do make it smoother for the person filling out the form.

<input style="text-transform:uppercase" type = "text" class = "normal" name = "Name" size = "20" maxlength = "20" value="<?php echo $name; ?>"> <img src="../images/tickmark.gif" border="0"/>

That's assuming you're using PHP as the backend and posting to the same page you are on. This will keep the user from having to fill out that part of the form again. Less annoying for the person filling out the form.

Various answers here have various problems, for what I was trying to achieve:

Just using text-transform changes the appearance but not the data. Using oninput or onkeydown changes the cursor position, so you can't, for instance, click in the middle of your existing input and edit it. Saving the position works, but just seemed a bit kludgey.

It felt cleaner to me to just break the problem up into two parts: upper-casing what I'm typing while I type (text-transform), and upper-casing the submitted data (run toUpperCase onchange):

<input id = "thing" onchange="this.value = this.value.toUpperCase(); pr()" style=text-transform:uppercase /><p>

Type something in that, hit return or click out of the input, then click in the middle of your previous entry, add some lc text, hit return...

Try below solution, This will also take care when a user enters only blank space in the input field at the first index.

document.getElementById('capitalizeInput').addEventListener("keyup",   () => {
  var inputValue = document.getElementById('capitalizeInput')['value']; 
  if (inputValue[0] === ' ') {
      inputValue = '';
    } else if (inputValue) {
      inputValue = inputValue[0].toUpperCase() + inputValue.slice(1);
    }
document.getElementById('capitalizeInput')['value'] = inputValue;
});

<input type="text" id="capitalizeInput" autocomplete="off" />

Just use this oninput in your input field:

<div class="form-group col-2">
<label>PINCODE</label>
<input type="number" name="pincode" id="pincode" class="form-control" minlength="6" maxlength="6" placeholder="Enter Pincode" oninput="this.value = this.value.toUpperCase()"  autocomplete="off"> 
</div>

Just add in your input(style="text-transform:uppercase")

<input type="text" class="normal" style="text-transform:uppercase" name="Name" size="20" maxlength="20">

<script type="text/javascript">
	function upperCaseF(a){
    setTimeout(function(){
        a.value = a.value.toUpperCase();
    }, 1);
}
</script>

<input type="text" required="" name="partno" class="form-control" placeholder="Enter a Part No*" onkeydown="upperCaseF(this)">