<html>
<head>
</head>
<body>
<input type="text" value="1" style="min-width:1px;" />
</body>
</html>
This is my code and it is not working. Is there any other way in HTML, JavaScript, PHP or CSS to set minimum width?
Clarification by Marcel: The OP wants a text input field with a dynamically changing width, so that the input field fluids around its contents.
I think you're misinterpreting the min-width CSS property. min-width is generally used to define a minimum DOM width in a fluid layout, like:
input {
width: 30%;
min-width: 200px;
}
That would set the input element to a minimum width of 200 pixels. In this context, "px" stands for "pixels".
Now, if you're trying to check to make sure that input field contains at least one character when a user submits it, you'll need to do some form validation with JavaScript and PHP. If that is indeed what you're attempting to do, I'll edit this answer and do my best to help you out.
You could do something like this
// HTML
<input id="input" type="text" style="width:3px" />
// jQuery
$(function(){
$('#input').keyup(function(){
$('<span id="width">').append( $(this).val() ).appendTo('body');
$(this).width( $('#width').width() + 2 );
$('#width').remove();
});
});
It sounds like your expectation is that the style be applied dynamically to the width of the textbox based on the contents of the textbox. If so you will need some js to run on textbox contents changing, something like this:
<input id="txt" type="text" onkeypress="this.style.width = ((this.value.length + 1) * 8) + 'px';">
To calculate the width of the current input, you'll have to embed it in a temporary span element, attach that thing to the DOM, get the computed width (in pixels) using the scrollWidth property and remove the span again. Of course you'll have to ensure that the same font family, font size, etc., is used in the input as well as in the span element. Therefore I assigned the same class to them.
I attached the function to the keyup event, as on keypress the input character is not yet added to the input value, so that will result in the wrong width. Unfortunately, I don't know how to get rid of the scrolling of the input field (when adding characters to the end of the field); it scrolls, because the character is added and shown before adjustWidthOfInput() is called. And, as said, I can't do this the other way round because then you'll have the value of the input field before the pressed character is inserted. I'll try to solve this issue later.
BTW, I only tested this in Firefox (3.6.8), but you'll get the point, I hope.
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Get/set width of <input></title>
<style>
body {
background: #666;
}
.input-element {
border: 0;
padding: 2px;
background: #fff;
font: 12pt sans-serif;
}
.tmp-element {
visibility: hidden;
}
</style>
</head>
<body>
<input id="theInput" type="text" class="input-element" value="1">
<script>
var inputEl = document.getElementById("theInput");
function getWidthOfInput() {
var tmp = document.createElement("span");
tmp.className = "input-element tmp-element";
tmp.innerHTML = inputEl.value.replace(/&/g,'&').replace(/</g,'<').replace(/>/g,'>');
document.body.appendChild(tmp);
var theWidth = tmp.scrollWidth;
document.body.removeChild(tmp);
return theWidth;
}
function adjustWidthOfInput() {
inputEl.style.width = getWidthOfInput() + "px";
}
adjustWidthOfInput();
inputEl.onkeyup = adjustWidthOfInput;
</script>
</body>
</html>
EDIT: Hey, wait, this is more or less the same answer as user338128 gave. Didn't notice it before, though.