I have 3 divs as colors to choose from and 3 blank divs. I want to let the user be able to:
(1) click a colored div and then a blank div, then the blank div is colored as the color the user choose. And the code seems to work.
(2) I want the user to be able to click the colored blank div again and it becomes white. And the code seems to work.
The problem is, if the blank div is colored and the user choose another color and click the colored blank div again, a newer color class will be added to the div, and things become unpredictable. You can open the console and track the messy change of the class of the blank div.
How can I solve this problem? I only want the blank divs to toggle between two classes.
var chosenColor;
function pickColor(arg){
chosenColor=arg.id;
}
function draw(id){
document.getElementById(id).classList.toggle("white");
document.getElementById(id).classList.toggle(chosenColor);
}
.box{
width: 100px;
height: 100px;
border: 1px solid black;
display: inline-block;
}
.red{background: red}
.blue{background: blue;}
.yellow{background: yellow;}
.white{background: white;}
<html>
<body>
<div class="box red" id="red" onclick="pickColor(this)">1</div>
<div class="box blue" id="blue" onclick="pickColor(this)">2</div>
<div class="box yellow" id="yellow" onclick="pickColor(this)">3</div>
<br><br>
<div class="box white" id="4" onclick="draw(4)">4</div>
<div class="box white" id="5" onclick="draw(5)">5</div>
<div class="box white" id="6" onclick="draw(6)">6</div>
</body>
</html>
Instead of using classes and running into the issue of assigning multiple nested classes or having to use complicated white logic...
I'd use data-* attribute:
var chosenColor;
function pick(el) {
chosenColor = el.dataset.color;
}
function draw(el) {
el.dataset.color = el.dataset.color ? "" : chosenColor;
}
body { background: #eee; }
.box {
width: 100px;
height: 100px;
border: 1px solid black;
display: inline-block;
background: white; /* BY DEFAULT !!! */
}
[data-color=red] { background: red; }
[data-color=blue] { background: blue; }
[data-color=yellow] { background: yellow; }
<div class="box" onclick="pick(this)" data-color="red">1</div>
<div class="box" onclick="pick(this)" data-color="blue">2</div>
<div class="box" onclick="pick(this)" data-color="yellow">3</div>
<br><br>
<div class="box" onclick="draw(this)">4</div>
<div class="box" onclick="draw(this)">5</div>
<div class="box" onclick="draw(this)">6</div>
What the ternary el.dataset.color = el.dataset.color ? "" : chosenColor; does is:
if the element has already any data-color set data-color to "" (nothing)
otherwise set data-color to the preselected chosenColor
Check to see if the element's classname is white. If not, set its class name to white - else, set it to the chosen color. You can put the boxes in a container and use .container > div selector, removing the need to give the boxes the .box class. Also, in a listener, this will refer to the clicked element - there's no need to use getElementById when you already have a reference to the element.
var chosenColor;
function pickColor(arg) {
chosenColor = arg.id;
}
function draw(element, id) {
if (element.className !== 'white') element.className = 'white';
else element.className = chosenColor;
}
.container > div {
width: 100px;
height: 100px;
border: 1px solid black;
display: inline-block;
}
.red {
background: red
}
.blue {
background: blue;
}
.yellow {
background: yellow;
}
.white {
background: white;
}
<div class="container">
<div class="red" id="red" onclick="pickColor(this)">1</div>
<div class="blue" id="blue" onclick="pickColor(this)">2</div>
<div class="yellow" id="yellow" onclick="pickColor(this)">3</div>
<br><br>
<div class="white" id="4" onclick="draw(this, 4)">4</div>
<div class="white" id="5" onclick="draw(this, 5)">5</div>
<div class="white" id="6" onclick="draw(this, 6)">6</div>
</div>
Answer
See - https://codepen.io/stephanieschellin/pen/xyYxrj/ (commented code)
or ...
var activeColor
function setPickerColor(event) {
activeColor = event.target.dataset.boxColorIs
}
function setThisBoxColor(event) {
let element = event.target
let the_existing_color_of_this_box = element.dataset.boxColorIs
if (the_existing_color_of_this_box == activeColor) {
delete element.dataset.boxColorIs
} else {
element.dataset.boxColorIs = activeColor
}
}
.box {
width: 100px;
height: 100px;
border: 1px solid black;
display: inline-block;
background: white;
}
[data-box-color-is="red"] {
background: red
}
[data-box-color-is="blue"] {
background: blue;
}
[data-box-color-is="yellow"] {
background: yellow;
}
<html>
<body>
<div id="box-1" class="box" data-box-color-is="red" onclick="setPickerColor(event)">1</div>
<div id="box-2" class="box" data-box-color-is="blue" onclick="setPickerColor(event)">2</div>
<div id="box-3" class="box" data-box-color-is="yellow" onclick="setPickerColor(event)">3</div>
<br>
<br>
<div id="box-4" class="box" onclick="setThisBoxColor(event)">4</div>
<div id="box-5" class="box" onclick="setThisBoxColor(event)">5</div>
<div id="box-6" class="box" onclick="setThisBoxColor(event)">6</div>
</body>
</html>
Using data- attributes you are able to decouple the JavaScript functional concerns form the CSS classes. This simplifies your logic but most importantly it allows folks styling your app to work independently from the folks adding JS functionality. This decoupling becomes really important when your team is using BEM or an OOCSS pattern.
Ideally instead of attaching styles to the data- attribute you would maintain the 'state' using data- and have another function that sets the classList based on the data- state. Allowing you to be 100% sure style changes you make will never effect JS functionality (QA will love you). But that's an evolution beyond this post.
With this setup we are not using the id's but I left them in because its an important best practice. Most likely this code would evolve into a component with listeners instead of inline onClick calls. JavaScript selectors should always be attached to id's or data- variables, never classes. Also, the id's should always be there for the QA team to utilize in their scripts. You risk some one changing a class name or removing it to adjust the styles and inadvertently breaking your JS listener.
I switched the arguments to pass the 'event' instead of the 'this' which is the element. Anyone using your JS event functions is going to expect the event object as the first parameter. You can pass 'this' as the second parameter if you like, but event.target will give you the same thing.
One other thing to note is the syntax change between declaring the data- variable and calling it from the JS.
HTML <div data-box-color-is="red">1</div>
JS event.target.dataset.boxColorIs
Regardless of how you format you data- attribute name it will always be parsed into camelCase when referencing it in JS ... data-box_color--IS would still become ... dataset.boxColorIs
Also as an evolution to your code you could remove the global JS var and store the value on the <body> or some other element on the page using data-. This will give you a single source of truth or 'state' that multiple features/components can reference without cluttering the global space.
Further Reading
https://css-tricks.com/bem-101/
https://en.bem.info/
https://philipwalton.com/articles/side-effects-in-css/
https://csswizardry.com/2015/03/more-transparent-ui-code-with-namespaces/
https://philipwalton.com/articles/decoupling-html-css-and-javascript/
I have an Import button that I want to look like this:
The HTML for that looks like this:
<button on-read-file="importTasks(contents)" class="btn btn-default" ng-click="importTasks();">Import</button>
However, because I want the button to open a file, my research shows I need to use an input control and it looks like this:
Here is the HTML for it:
<input type="file" on-read-file="importTasks(contents)" class="btn btn-default" ng-click="importTasks();"></input>
I don't need the input box, and I don't need a button to say browse. I want the functionality of the second option, with the look of the first. Is that possible?
Hide the input and use a label whose "for" attribute matches the input's ID. Then simply style the label however you want.
<input type="file" id="abc" hidden>
<label for="abc">Import</label>
Edit
For completeness, here's the actual code that was used. Because the button was wrapped in a label, no extra styling was necessary.
<input id="hiddenImport" style="display:none" type="file" on-read-file="importTasks(contents)" ng-click="importTasks();"/>
<label for="hiddenImport"><button class="btn btn-default" ng-disabled="loading">Import</button></label>
Yes but you will need to use javascript. Make the file input hidden and then make the button click activate it like so
<input id="files" type="file" style="display:none"/>
<button id="upload" type="button"> </button>
<script>
$('#upload').click(function() {
$('#files').click();
});
</script>
You will have to use CSS to make the input box transparent and add a button-like design over it like this:
HTML:
<div class="fileInput">
<input type="file" on-read-file="importTasks(contents)" class="btn btn-default" ng-click="importTasks();"/>
</div>
CSS:
.fileInput {
margin: 20px;
width: 80px;
height: 20px;
background-color: #FFF;
border: #CCC 2px solid;
overflow: hidden;
text-align:center;
}
.fileInput input {
display: block !important;
width: 80px !important;
height: 20px !important;
opacity: 0 !important;
overflow: hidden !important;
}
Link to jsFiddle: https://jsfiddle.net/AndrewL32/h40juz64/
NOTE: If you want the "INPUT" text over the button, you can either add it on a separate div and then use css positioning to move it over the Input box (which can get a bit tricky) OR you can just make an image with the "INPUT" text on it and then use it as a background-image for the button.
The site is here
I have opt to using the radiobutton's labels as customized buttons for them. This means the radio inputs themselves are display:none. Because of this, the browsers don't tab stop at the radio labels, but I want them to.
I tried forcing a tabindex to them, but no cigar.
I have came up with just putting a pointless checkbox right before the labels, and set it to width: 1px; and height 1px; which seems to only really work on chrome & safari.
So do you have any other ideas for forcing a tab stop at those locations without showing an element?
Edit:
Just incase someone else comes by this, this is how I was able to insert small checkboxes into chrome & safari using JQuery:
if ($.browser.safari) {
$("label[for='Unlimited']").parent().after('<input style="height:1px; width:1px;" type="checkbox">');
$("label[for='cash']").parent().after('<input style="height:1px; width:1px;" type="checkbox">');
$("label[for='Length12']").parent().after('<input style="height:1px; width:1px;" type="checkbox">');
}
Note: $.browser.webkit was not becoming true...so I had to use safari
a working solution in my case to enable tab selection / arrow navigation was to set the opacity to zero rather than a "display: none"
.styled-selection input {
opacity: 0; // hide it visually
z-index: -1; // avoid unintended clicks
position: absolute; // don't affect other elements positioning
}
Keep the radio input hidden, but set tabindex="0" on the <label> element of reach radio input.
(A tab index of 0 keeps the element in tab flow with other elements with an unspecified tab index which are still tabbable.)
If you separate the label from any field and set a tabIndex you can tab to it and capture mouse and key events. It seems more sensible to use buttons or inputs with type="button",
but suit yourself.
<form>
<fieldset>
<input value="today">
<label tabIndex="0" onfocus="alert('label');">Label 1</label>
</fieldset>
</form>
I have an alternative answer that I think has not been mentioned yet. For recent work I've been reading the Mozilla Developer Docs MDN Docs, Forms, especially the Accessibility Section MDN Docs, Accessible HTML(5), for information related to keyboard accessibility and form structure.
One of the specific mentions in the Accessibility section is to use HTML5 elements when and where possible -- they often have cross-browser and more accessible support by default (not always true, but clear content structure and proper elements also help screen reading along with keyboard accessibility).
Anyway, here's a JSFiddle: JSFiddle::Keyboard Accessible Forms
Essentially, what I did was:
shamelessly copy over some of the source code from a Mozilla source code to a JSFiddle (source in the comments of the fiddle)
create a TEXT-type and assign it the "readonly" HTML5 attribute
add attribute tabindex="0" to the readonly
Modify the "readonly" CSS for that input element so it looks "blank" or hidden"
HTML
<title>Native keyboard accessibility</title>
<body>
<h1>Native keyboard accessibility</h1>
<hr>
<h2>Links</h2>
<p>This is a link to Mozilla.</p>
<p>Another link, to the Mozilla Developer Network.</p>
<h2>Buttons</h2>
<p>
<button data-message="This is from the first button">Click me!</button>
<button data-message="This is from the second button">Click me too!
</button>
<button data-message="This is from the third button">And me!</button>
</p>
<!-- "Invisible" HTML(5) element -->
<!-- * a READONLY text-input with modified CSS... -->
<hr>
<label for="hidden-anchor">Hidden Anchor Point</label>
<input type="text" class="hidden-anchor" id="hidden-anchor" tabindex="0" readonly />
<hr>
<h2>Form</h2>
<form name="personal-info">
<fieldset>
<legend>Personal Info</legend>
<div>
<label for="name">Fill in your name:</label>
<input type="text" id="name" name="name">
</div>
<div>
<label for="age">Enter your age:</label>
<input type="text" id="age" name="age">
</div>
<div>
<label for="mood">Choose your mood:</label>
<select id="mood" name="mood">
<option>Happy</option>
<option>Sad</option>
<option>Angry</option>
<option>Worried</option>
</select>
</div>
</fieldset>
</form>
<script>
var buttons = document.querySelectorAll('button');
for(var i = 0; i < buttons.length; i++) {
addHandler(buttons[i]);
}
function addHandler(button) {
button.addEventListener('click', function(e) {
var message = e.target.getAttribute('data-message');
alert(message);
})
}
</script>
</body>
CSS Styling
input {
margin-bottom: 10px;
}
button {
margin-right: 10px;
}
a:hover, input:hover, button:hover, select:hover,
a:focus, input:focus, button:focus, select:focus {
font-weight: bold;
}
.hidden-anchor {
border: none;
background: transparent!important;
}
.hidden-anchor:focus {
border: 1px solid #f6b73c;
}
BTW, you can edit the CSS rule for .hidden-anchor:focus to remove the highlight for the hidden anchor if you want. I added it just to "prove" the concept here, but it still works invisibly as requested.
I hope this helps!
My preference:
.tab-only:not(:focus) {
position: fixed;
left: -999999px;
}
<button class="tab-only">Jump to main</button>
Another great option would be to nest your input + div in a label and hide the input by setting width and height to 0px instead of display: none
This method even allows you to use pseudo-classes like :focus or :checked by using input:pseudo + styleDiv
<label>
<input type="radio">
<div class="styleDiv">Display text</div>
</label>
input
{
width: 0px;
height: 0px;
}
input + .styleDiv
{
//Radiobutton style here
display: inline-block
}
input:checked + .styleDiv
{
//Checked style here
}
Discard the radio-buttons and instead; keep some hidden fields in your code, in which you store the selected value of your UI components.
Is there a way to style (or script) <input type=file /> element to have visible only "Browse" button without text field?
Thanks
Edit:
Just to clarify why to I need this. I'm using multi file upload code from http://www.morningz.com/?p=5 and it doesn't need input text field because it never has value. Script just adds newly selected file to collection on page. It would look much better without text field, if it's possible.
<input type="file" id="selectedFile" style="display: none;" />
<input type="button" value="Browse..." onclick="document.getElementById('selectedFile').click();" />
This will surely work as I have used it in my projects.
I was having a heck of a time trying to accomplish this. I didn't want to use a Flash solution, and none of the jQuery libraries I looked at were reliable across all browsers.
I came up with my own solution, which is implemented completely in CSS (except for the onclick style change to make the button appear 'clicked').
You can try a working example here: http://jsfiddle.net/VQJ9V/307/ (Tested in FF 7, IE 9, Safari 5, Opera 11 and Chrome 14)
It works by creating a big file input (with font-size:50px), then wrapping it in a div that has a fixed size and overflow:hidden. The input is then only visible through this "window" div. The div can be given a background image or color, text can be added, and the input can be made transparent to reveal the div background:
HTML:
<div class="inputWrapper">
<input class="fileInput" type="file" name="file1"/>
</div>
CSS:
.inputWrapper {
height: 32px;
width: 64px;
overflow: hidden;
position: relative;
cursor: pointer;
/*Using a background color, but you can use a background image to represent a button*/
background-color: #DDF;
}
.fileInput {
cursor: pointer;
height: 100%;
position:absolute;
top: 0;
right: 0;
z-index: 99;
/*This makes the button huge. If you want a bigger button, increase the font size*/
font-size:50px;
/*Opacity settings for all browsers*/
opacity: 0;
-moz-opacity: 0;
filter:progid:DXImageTransform.Microsoft.Alpha(opacity=0)
}
Let me know if there are any problems with it and I'll try to fix them.
I wasted my day today getting this to work. I found none of the solutions here working each of my scenarios.
Then I remembered I saw an example for the JQuery File Upload without text box. So what I did is that I took their example and stripped it down to the relevant part.
This solution at least works for IE and FF and can be fully styled. In the below example the file input is hidden under the fancy "Add Files" button.
<html>
<head>
<title>jQuery File Upload Example</title>
<style type="text/css">
.myfileupload-buttonbar input
{
position: absolute;
top: 0;
right: 0;
margin: 0;
border: solid transparent;
border-width: 0 0 100px 200px;
opacity: 0.0;
filter: alpha(opacity=0);
-o-transform: translate(250px, -50px) scale(1);
-moz-transform: translate(-300px, 0) scale(4);
direction: ltr;
cursor: pointer;
}
.myui-button
{
position: relative;
cursor: pointer;
text-align: center;
overflow: visible;
background-color: red;
overflow: hidden;
}
</style>
</head>
<body>
<div id="fileupload" >
<div class="myfileupload-buttonbar ">
<label class="myui-button">
<span >Add Files</span>
<input id="file" type="file" name="files[]" />
</label>
</div>
</div>
</body>
</html>
Add a label tag with for attribute assign the for attribute value to the file input button.
Now when you click the label, the browser will open up the file browse dialogue popup automatically.
Note: Hide the file input button using CSS.
Check the live demo below.
$('#imageUpload').change(function() {
readImgUrlAndPreview(this);
function readImgUrlAndPreview(input) {
if (input.files && input.files[0]) {
var reader = new FileReader();
reader.onload = function(e) {
$('#imagePreview').removeClass('hide').attr('src', e.target.result);
}
};
reader.readAsDataURL(input.files[0]);
}
});
.hide {
display: none;
}
.btn {
display: inline-block;
padding: 4px 12px;
margin-bottom: 0;
font-size: 14px;
line-height: 20px;
color: #333333;
text-align: center;
vertical-align: middle;
cursor: pointer;
border: 1px solid #ddd;
box-shadow: 2px 2px 10px #eee;
border-radius: 4px;
}
.btn-large {
padding: 11px 19px;
font-size: 17.5px;
-webkit-border-radius: 4px;
-moz-border-radius: 4px;
border-radius: 4px;
}
#imagePreview {
margin: 15px 0 0 0;
border: 2px solid #ddd;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/2.0.0/jquery.min.js"></script>
<div clas="file_input_wrap">
<input type="file" name="imageUpload" id="imageUpload" class="hide" />
<label for="imageUpload" class="btn btn-large">Select file</label>
</div>
<div class="img_preview_wrap">
<img src="" id="imagePreview" alt="Preview Image" width="200px" class="hide" />
</div>
Hide the input-file element and create a visible button that will trigger the click event of that input-file.
Try this:
CSS
#file { width:0; height:0; }
HTML:
<input type='file' id='file' name='file' />
<button id='btn-upload'>Upload</button>
JAVASCRIPT(jQuery):
$(function(){
$('#btn-upload').click(function(e){
e.preventDefault();
$('#file').click();}
);
});
I tried to implement the top two solutions, and it ended up being a HUGE waste of time for me. In the end, applying this .css class solved the problem...
input[type='file'] {
color: transparent;
}
Done! super clean and super simple...
That's going to be very hard. The problem with the file input type is that it usually consists of two visual elements, while being treated as a single DOM-element. Add to that that several browsers have their own distinct look and feel for the file input, and you're set for nightmare. See this article on quirksmode.org about the quirks the file input has. I guarantee you it won't make you happy (I speak from experience).
[EDIT]
Actually, I think you might get away with putting your input in a container element (like a div), and adding a negative margin to the element. Effectively hiding the textbox part off screen.
Another option would be to use the technique in the article I linked, to try to style it like a button.
Fix to work in all browsers
RESOLVED:
<input type = "button" value = "Choose image"
onclick ="javascript:document.getElementById('imagefile').click();">
<input id = "imagefile" type="file" style='visibility: hidden;' name="img"/>
I have tested in FF, Chrome & IE - working fine, applied styles too :D
Here is my good ol' remedy:
<input type="file" id="myFile" style="display:none;" />
<button type="button" onclick="document.getElementById('myFile').click();">Browse</button>
At least it worked in Safari.
Plain and simple.
Another easy way of doing this. Make a "input type file" tag in html and hide it. Then click a button and format it according to need. After this use javascript/jquery to programmatically click the input tag when the button is clicked.
HTML :-
<input id="file" type="file" style="display: none;">
<button id="button">Add file</button>
JavaScript :-
document.getElementById('button').addEventListener("click", function() {
document.getElementById('file').click();
});
jQuery :-
$('#button').click(function(){
$('#file').click();
});
CSS :-
#button
{
background-color: blue;
color: white;
}
Here is a working JS fiddle for the same :- http://jsfiddle.net/32na3/
I used some of the code recommended above and after many hours of waisting my time, I eventually came to a css bag free solution.
You can run it over here - http://jsfiddle.net/WqGph/
but then found a better solution - http://jsfiddle.net/XMMc4/5/
<input type = "button" value = "Choose image #2"
onclick ="javascript:document.getElementById('imagefile').click();">
<input id = "imagefile" type="file" style='display:none;' name="img" value="none"/>see jsfiddle code for examples<br/>
You could label an image so when you click on it the click event of the button will be triggered. You can simply make the normal button invisible:
<form>
<label for="fileButton"><img src="YourSource"></label> <!--You don't have to put an image here, it can be anything you like-->
<input type="file" id="fileButton" style="display:none;"/>
</form>
It worked for me on all browsers, and is very easy to use.
You can dispatch the click event on a hidden file input like this:
<form action="#type your action here" method="POST" enctype="multipart/form-data">
<div id="yourBtn" style="height: 50px; width: 100px;border: 1px dashed #BBB; cursor:pointer;" >Click to upload!</div>
<!-- hide input[type=file]!-->
<div style='height: 0px;width:0px; overflow:hidden;'><input id="upfile" type="file" value="upload"/></div>
<input type="submit" value='submit' >
</form>
<script type="text/javascript">
var btn = document.getElementById("yourBtn");
var upfile = document.getElementById("upfile");
btn.addEventListener('click',function(){
if(document.createEvent){
var ev = document.createEvent('MouseEvents');
ev.initEvent('click',true,false);
upfile.dispatchEvent(ev);
}else{
upfile.click();
}
});
</script>
HTML:
<input type="file" name="upload" id="upload" style="display:none"></input>
<button id="browse">Upload</button>
JQUERY
$(document).ready(function(){
$("#browse").click(function(){
$("#upload").click();
});
});
Hope this works :)
This HTML code show up only Upload File button
<form action="/action_page.php">
<input type="button" id="id" value="Upload File" onclick="document.getElementById('file').click();" />
<input type="file" style="display:none;" id="file" name="file" onchange="this.form.submit()"/>
</form>
You can give the input element a font opacity of 0. This will hide the text field without hiding the 'Choose Files' button.
No javascript required, clear cross browser as far back as IE 9
E.g.,
input {color: rgba(0, 0, 0, 0);}
Ive a really hacky solution with this...
<style type="text/css">
input[type="file"]
{
width: 80px;
}
</style>
<input id="File1" type="file" />
The problem is the width attribute that is hiding the text field will obvously vary between browsers, vary between Windows XP themes and so on. Maybe its something you can work with though?...
I know this is an old post but a simple way to make the text dissapear is just to set text color to that of your background.
eg if your text input background is white then:
input[type="file"]{
color:#fff;
}
This will not effect the Choose File text which will still be black due to the browser.
There is a simple and hacky way to show only the file input button while keeping the render and translations of this file input button :
Make the text that is displayed after a file input invisible using a the color transparent.
<input type="file" style="color: transparent" />
my solution is just to set it within a div like "druveen" said, however i ad my own button style to the div (make it look like a button with a:hover) and i just set the style "opacity:0;" to the input. Works a charm for me, hope it does the same for you.
This works for me:
input[type="file"] {
color: white!important;
}
I just styled an input file with width: 85px, and the text field disappeared at all
Select Logo <input type="file" id="logo">
$("#logo").css('opacity','0');
$("#select_logo").click(function(){
$().trigger('click');
return false;
});
For me, the simplest way is using a font color like background color. Simple, not elegant, but usefull.
<div style="color:#FFFFFF"> <!-- if background page is white, of course -->
<input class="fileInput" type="file" name="file1"/></div>
So here's the best way to do this FOR ALL BROWSERS:
Forget CSS!
<p>Append Image:</p>
<input type="button" id="clickImage" value="Add Image" />
<input type="file" name="images[]" id="images" multiple />
<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.6.1/jquery.min.js" charset="utf-8"></script>
<script>
$('#images').hide();
$('#clickImage').click( function() {
$('#images').trigger('click');
});
</script>
All these answers are cute, but CSS won't work since it isn't the same across all browsers and devices, the first answer I wrote will work in everything but Safari. To get it to work accross all browsers all the time it must be created dynamically and recreated every time you want to clear the input text:
var imageDiv = document.createElement("div");
imageDiv.setAttribute("id", "imagediv");
imageDiv.style.cssText = 'position:relative; vertical-align: bottom;';
var imageText = document.createTextNode("Append Image:");
var newLine = document.createElement("br");
var image = document.createElement("input");
image.setAttribute("type", "file");
image.setAttribute("id", "images");
image.setAttribute("name", "images[]");
image.setAttribute("multiple", "multiple");
imageDiv.appendChild(imageText);
imageDiv.appendChild(newLine);
imageDiv.appendChild(image);
questionParagraph.appendChild(imageDiv);
The answer of tmanthey is quite good, except that you can't play with border-width in Firefox v20. If you see the link (demo, can't really show here) they solved the problem using font-size=23px, transform:translate(-300px, 0px) scale(4) for Firefox to get the button bigger.
Other solutions using .click() on a different div is useless if you want to make it a drag'n'drop input box.
There are several valid options here but thought I would give what I have come up with while trying to fix a similar issue. http://jsfiddle.net/5RyrG/1/
<span class="btn fileinput-button">
<span>Import Field(s)</span>
<input id="fileupload" type="file" name="files[]" onchange="handleFiles(this.files)" multiple>
</span>
<div id="txt"></div>
function handleFiles(files){
$('#txt').text(files[0].name);
}
I wrote this:
<form action='' method='POST' name='form-upload-image' id='form-upload-image' enctype='multipart/form-data'>
<div style="width: 0; height: 0; overflow: hidden;">
<input type="file" name="input-file" id="input-file" onchange="this.files.length > 0 ? document.getElementById('form-upload-image').submit():null;" />
</div>
</form>
<img src="image.jpg" style="cursor: pointer;" onclick="document.getElementById('input-file').click();" />
Work fine in all browsers, no jQuery, no CSS.
Here is a simplified version of #ampersandre's popular solution that works in all major browsers.
Asp.NET markup
<asp:TextBox runat="server" ID="FilePath" CssClass="form-control"
style="float:left; display:inline; margin-right:5px; width:300px"
ReadOnly="True" ClientIDMode="Static" />
<div class="inputWrapper">
<div id="UploadFile" style="height:38px; font-size:16px;
text-align:center">Upload File</div>
<div>
<input name="FileUpload" id="FileInput" runat="server"
type="File" />
</div>
</div>
<asp:Button ID="UploadButton" runat="server"
style="display:none" OnClick="UploadButton_Click" />
</div>
<asp:HiddenField ID="hdnFileName" runat="server" ClientIDMode="Static" />
JQuery Code
$(document).ready(function () {
$('#UploadFile').click(function () {
alert('UploadFile clicked');
$('[id$="FileInput"]').trigger('click');
});
$('[id$="FileInput"]').change(function (event) {
var target = event.target;
var tmpFile = target.files[0].name;
alert('FileInput changed:' + tmpFile);
if (tmpFile.length > 0) {
$('#hdnFileName').val(tmpFile);
}
$('[id$="UploadButton"]').trigger('click');
});
});
css code
.inputWrapper {
height: 38px;
width: 102px;
overflow: hidden;
position: relative;
padding: 6px 6px;
cursor: pointer;
white-space:nowrap;
/*Using a background color, but you can use a background image to represent
a button*/
background-color: #DEDEDE;
border: 1px solid gray;
border-radius: 4px;
-moz-user-select: none;
-ms-user-select: none;
-webkit-user-select: none;
user-select: none;
}
Uses a hidden "UploadButton" click trigger for server postback with standard . The with "Upload File" text pushes the input control out of view in the wrapper div when it overflows so there is no need to apply any styles for the "file input" control div. The $([id$="FileInput"]) selector allows section of ids with standard ASP.NET prefixes applied. The FilePath textbox value in set from server code behind from hdnFileName.Value once file is uploaded.