Styling an input type=“file” button

2018-12-31 02:12发布

How to style the input type="file" button.

标签: html css file-io
30条回答
旧时光的记忆
2楼-- · 2018-12-31 02:58

Here is a solution which doesn't really style the <input type="file" /> element but instead uses a <input type="file" /> element on top of other elements (which can be styled). The <input type="file" /> element is not really visible hence, the overall illusion is of a nicely styled file upload control.

I came across this problem recently and despite the plethora of answers on Stack Overflow, none really seemed to fit the bill. In the end, I ended up customizing this so as to have a simple and an elegant solution.

I have also tested this on Firefox, IE (11, 10 & 9), Chrome and Opera, iPad and a few android devices.

Here's the JSFiddle link -> http://jsfiddle.net/umhva747/

$('input[type=file]').change(function(e) {
    $in = $(this);
    $in.next().html($in.val());
    
});

$('.uploadButton').click(function() {
    var fileName = $("#fileUpload").val();
    if (fileName) {
        alert(fileName + " can be uploaded.");
    }
    else {
        alert("Please select a file to upload");
    }
});
body {
    background-color:Black;
}

div.upload {
    background-color:#fff;
    border: 1px solid #ffffd;
    border-radius:5px;
    display:inline-block;
    height: 30px;
    padding:3px 40px 3px 3px;
    position:relative;
    width: auto;
}

div.upload:hover {
    opacity:0.95;
}

div.upload input[type="file"] {
    display: input-block;
    width: 100%;
    height: 30px;
    opacity: 0;
    cursor:pointer;
    position:absolute;
    left:0;
}
.uploadButton {
    background-color: #425F9C;
    border: none;
    border-radius: 3px;
    color: #FFF;
    cursor:pointer;
    display: inline-block;
    height: 30px;
    margin-right:15px;
    width: auto;
    padding:0 20px;
    box-sizing: content-box;
}

.fileName {
    font-family: Arial;
    font-size:14px;
}

.upload + .uploadButton {
    height:38px;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
<form action="" method="post" enctype="multipart/form-data">
    <div class="upload">
        <input type="button" class="uploadButton" value="Browse" />
        <input type="file" name="upload" accept="image/*" id="fileUpload" />
        <span class="fileName">Select file..</span>
    </div>
    <input type="button" class="uploadButton" value="Upload File" />
</form>

Hope this helps!!!

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低头抚发
3楼-- · 2018-12-31 02:58

This week I also needed to custom the button and display the selected file name aside it, so after reading some of the answers above (Thanks BTW) I came up with the following implementation:

HTML:

<div class="browse">
<label id="uploadBtn" class="custom-file-upload">Choose file
<input type="file" name="fileInput" id="fileInput" accept=".yaml" ngf-select ngf-change="onFileSelect($files)" />
</label>
<span>{{fileName}}</span>
</div>

CSS

   input[type='file'] {
    color: #a1bbd5;
    display: none;

}

.custom-file-upload {
    border: 1px solid #a1bbd5;
    display: inline-block;
    padding: 2px 8px;
    cursor: pointer;
}

label{
    color: #a1bbd5;
    border-radius: 3px;
}

Javascript (Angular)

app.controller('MainCtrl', function($scope) {

        $scope.fileName = 'No file chosen';

          $scope.onFileSelect = function ($files) {
          $scope.selectedFile = $files;
          $scope.fileName = $files[0].name;
    };
});

Basically I'm working with ng-file-upload lib, Angular-wise I'm binding the filename to my $scope and giving it the initial value of 'No file chosen', I'm also binding the onFileSelect() function to my scope so when a file gets selected I'm getting the filename using ng-upload API and assign it to the $scope.filename.

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墨雨无痕
4楼-- · 2018-12-31 02:58

Don't be fooled by "great" CSS-only solutions that are actually very browser-specific, or that overlay the styled button on top of the real button, or that force you to use a <label> instead of a <button>, or any other such hack. JavaScript IS necessary to get it working for general usage. Please study how gmail and DropZone do it if you don't believe me.

Just style a normal button however you want, then call a simple JS function to create and link a hidden input element to your styled button.

<!DOCTYPE html>
<meta charset="utf-8">

<style>
    button {
        width            : 160px;
        height           : 30px;
        font-size        : 13px;
        border           : none;
        text-align       : center;
        background-color : #444;
        color            : #6f0;
    }
    button:active {
        background-color : #779;
    }
</style>

<button id="upload">Styled upload button!</button>

<script>

function Upload_On_Click(id, handler) {
    var hidden_input = null;
    document.getElementById(id).onclick = function() {hidden_input.click();}
    function setup_hidden_input() {
        hidden_input && hidden_input.parentNode.removeChild(hidden_input);
        hidden_input = document.createElement("input");
        hidden_input.setAttribute("type", "file");
        hidden_input.style.visibility = "hidden";
        document.querySelector("body").appendChild(hidden_input);
        hidden_input.onchange = function() {
            handler(hidden_input.files[0]);
            setup_hidden_input();
        };
    }
    setup_hidden_input();
}

Upload_On_Click("upload", function(file) {
    console.log("GOT FILE: " + file.name);
});

</script>

Notice how the above code re-links it after every time the user chooses a file. This is important because "onchange" is only called if the user changes the filename. But you probably want to get the file every time the user provides it.

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像晚风撩人
5楼-- · 2018-12-31 02:59

All rendering engines automatically generate a button when an <input type="file"> is created. Historically, that button has been completely un-styleable. However, Trident and WebKit have added hooks through pseudo-elements.

Trident

As of IE10, the file input button can be styled using the ::-ms-browse pseudo-element. Basically, any CSS rules that you apply to a regular button can be applied to the pseudo-element. For example:

::-ms-browse {
  background: black;
  color: red;
  padding: 1em;
}
<input type="file">

This displays as follows in IE10 on Windows 8:

This displays as follows in IE10 on Windows 8:

WebKit

WebKit provides a hook for its file input button with the ::-webkit-file-upload-button pseudo-element. Again, pretty much any CSS rule can be applied, therefore the Trident example will work here as well:

::-webkit-file-upload-button {
  background: black;
  color: red;
  padding: 1em;
}
<input type="file">

This displays as follows in Chrome 26 on OS X:

This displays as follows in Chrome 26 on OS X:

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萌妹纸的霸气范
6楼-- · 2018-12-31 03:00

This is a nice way to do it with material / angular file upload. You could do the same with a bootstrap button.

Note I used <a> instead of <button> this allows the click events to bubble up.

<label>
    <input type="file" (change)="setFile($event)" style="display:none" />

    <a mat-raised-button color="primary">
      <mat-icon>file_upload</mat-icon>
      Upload Document
    </a>

  </label>
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一个人的天荒地老
7楼-- · 2018-12-31 03:01

Here is a solution, that also shows the chosen file name: http://jsfiddle.net/raft9pg0/1/

HTML:

<label for="file-upload" class="custom-file-upload">Chose file</label>
<input id="file-upload" type="file"/>
File: <span id="file-upload-value">-</span>

JS:

$(function() {
    $("input:file[id=file-upload]").change(function() {
        $("#file-upload-value").html( $(this).val() );
    });
});

CSS:

input[type="file"] {
    display: none;
}

.custom-file-upload {
      background: #ffffd;
      border: 1px solid #aaa;
      border-top: 1px solid #ccc;
      border-left: 1px solid #ccc;
      -moz-border-radius: 3px;
      -webkit-border-radius: 3px;
      border-radius: 3px;
      color: #444;
      display: inline-block;
      font-size: 11px;
      font-weight: bold;
      text-decoration: none;
      text-shadow: 0 1px rgba(255, 255, 255, .75);
      cursor: pointer;
      margin-bottom: 20px;
      line-height: normal;
      padding: 8px 10px; }
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