Styling an input type=“file” button

2018-12-31 02:12发布

站内问答 / HTML/CSS
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How to style the input type="file" button.

标签： html css file-io
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30条回答
只靠听说
2楼-- · 2018-12-31 03:02

As JGuo and CorySimmons mentioned, you can use the clickable behaviour of a stylable label, hiding the less flexible file input element.

<!DOCTYPE html>
<html>
<head>
<title>Custom file input</title>
<link rel="stylesheet" href="http://netdna.bootstrapcdn.com/bootstrap/3.1.1/css/bootstrap.min.css">
</head>

<body>

<label for="upload-file" class="btn btn-info"> Choose file... </label>
<input id="upload-file" type="file" style="display: none"
onchange="this.nextElementSibling.textContent = this.previousElementSibling.title = this.files[0].name">
<div></div>

</body>
</html>
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余生请多指教
3楼-- · 2018-12-31 03:03

follow these steps then you can create custom styles for your file upload form:

1.) this is the simple html form(please read the html comments i have written here below)

<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;" onclick="getFile()">Click to upload!</div>
  <!-- this is your file input tag, so i hide it!-->
  <div style='height: 0px;width:0px; overflow:hidden;'><input id="upfile" type="file" value="upload"/></div>
  <!-- here you can have file submit button or you can write a simple script to upload the file automatically-->
  <input type="submit" value='submit' >
</form>

2.) then use this simple script to pass the click event to file input tag.

function getFile(){
     document.getElementById("upfile").click();
}

now you can use any type of a styling without worrying how to change default styles. i know this very well, because i have been trying to change the default styles for month and a half. believe me it's very hard because different browsers have different upload input tag. So use this one to build your custom file upload forms.Here is the full AUTOMATED UPLOAD code.

<html>
<head>
<style>
#yourBtn{
   position: relative;
       top: 150px;
   font-family: calibri;
   width: 150px;
   padding: 10px;
   -webkit-border-radius: 5px;
   -moz-border-radius: 5px;
   border: 1px dashed #BBB; 
   text-align: center;
   background-color: #DDD;
   cursor:pointer;
  }
</style>
<script type="text/javascript">
 function getFile(){
   document.getElementById("upfile").click();
 }
 function sub(obj){
    var file = obj.value;
    var fileName = file.split("\\");
    document.getElementById("yourBtn").innerHTML = fileName[fileName.length-1];
    document.myForm.submit();
    event.preventDefault();
  }
</script>
</head>
<body>
<center>
<form action="#type your action here" method="POST" enctype="multipart/form-data" name="myForm">
<div id="yourBtn" onclick="getFile()">click to upload a file</div>
<!-- this is your file input tag, so i hide it!-->
<!-- i used the onchange event to fire the form submission-->
<div style='height: 0px;width: 0px; overflow:hidden;'><input id="upfile" type="file" value="upload" onchange="sub(this)"/></div>
<!-- here you can have file submit button or you can write a simple script to upload the file automatically-->
<!-- <input type="submit" value='submit' > -->
</form>
</center>
</body>
</html>

enjoy!

Have a Nice Day,

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美炸的是我
4楼-- · 2018-12-31 03:03

I am able to do it with pure CSS using below code. I have used bootstrap and font-awesome.

<link href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet" />
<link href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.css" rel="stylesheet" />

<label class="btn btn-default btn-sm center-block btn-file">
  <i class="fa fa-upload fa-2x" aria-hidden="true"></i>
  <input type="file" style="display: none;">
</label>

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一个人的天荒地老
5楼-- · 2018-12-31 03:03

VISIBILITY:hidden TRICK

I usually go for the visibility:hidden trick

this is my styled button

<div id="uploadbutton" class="btn btn-success btn-block">Upload</div>

this is the input type=file button. Note the visibility:hidden rule

<input type="file" id="upload" style="visibility:hidden;">

this is the JavaScript bit to glue them together. It works

<script>
 $('#uploadbutton').click(function(){
    $('input[type=file]').click();
 });
 </script>
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大哥的爱人
6楼-- · 2018-12-31 03:06

Here's a simple css only solution, that creates a consistent target area, and lets you style your faux elements however you like.

The basic idea is this:

  1. Have two "fake" elements (a text input/link) as siblings to your real file input. Absolutely position them so they're exactly on top of your target area.
  2. Wrap your file input with a div. Set overflow to hidden (so the file input doesn't spill out), and make it exactly the size that you want your target area to be.
  3. Set opacity to 0 on the file input so it's hidden but still clickable. Give it a large font size so the you can click on all portions of the target area.

Here's the jsfiddle: http://jsfiddle.net/gwwar/nFLKU/

<form>
    <input id="faux" type="text" placeholder="Upload a file from your computer" />
    <a href="#" id="browse">Browse </a>
    <div id="wrapper">
        <input id="input" size="100" type="file" />
    </div>
</form>
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无色无味的生活
7楼-- · 2018-12-31 03:07

A really clever solution using jQuery that works in all older browsers as well as in the new ones, I found here. It takes care of all the styling and click() problems, using the actual file browse button. I made a plain javascript version: fiddle The solution is as simple as genius: make the file-input invisible, and use a piece of code to place it under the mousecursor.

<div class="inp_field_12" onmousemove="file_ho(event,this,1)"><span>browse</span>
<input id="file_1" name="file_1" type="file" value="" onchange="file_ch(1)">
</div>
<div id="result_1" class="result"></div>


function file_ho(e, o, a) {
    e = window.event || e;
    var x = 0,
    y = 0;
    if (o.offsetParent) {
        do {
        x += o.offsetLeft;
        y += o.offsetTop;
        } while (o = o.offsetParent);
    }
var x1 = e.clientX || window.event.clientX;
var y1 = e.clientY || window.event.clientY;
var le = 100 - (x1 - x);
var to = 10 - (y1 - y);
document.getElementById('file_' + a).style.marginRight = le + 'px';
document.getElementById('file_' + a).style.marginTop = -to + 'px';
}

.inp_field_12 {
position:relative;
overflow:hidden;
float: left;
width: 130px;
height: 30px;
background: orange;
}
.inp_field_12 span {
position: absolute;
width: 130px;
font-family:'Calibri', 'Trebuchet MS', sans-serif;
font-size:17px;
line-height:27px;
text-align:center;
color:#555;
}
.inp_field_12 input[type='file'] {
cursor:pointer;
cursor:hand;
position: absolute;
top: 0px;
right: 0px;
-moz-opacity:0;
filter:alpha(opacity: 0);
opacity: 0;
outline: none;
outline-style:none;
outline-width:0;
ie-dummy: expression(this.hideFocus=true);
}
.inp_field_12:hover {
background-position:-140px -35px;
}
.inp_field_12:hover span {
color:#fff;
}
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