这里我们使用span来触发类型文件的输入，并且我们简单地定制了span，所以我们可以使用这种方式添加任何样式。

注意，我们使用带有可见性:hidden选项的input标记，并在span中触发它。

.attachFileSpan { 颜色:# 2 b6dad; 光标:指针; ｝ .attachFileSpan:{徘徊 文字修饰:下划线; ｝ <h3>自定义输入文件类型</h3> <input id="myInput" type="file" style="visibility:hidden"/> <span title="attach file" class="attachFileSpan" onclick="document.getElementById('myInput').click()" > 附加文件 < / span >

参考

$ (' .new_Btn ') .click(函数(){ $ (' # html_btn ') .click (); })； .new_Btn { // CSS属性 ｝ # html_btn { 显示:没有; ｝ < script src = " https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js " > < /脚本> < div class = " new_Btn”> SelectPicture < / div > < br > <input id="html_btn" type='file' /><br> .

你也可以在没有jQuery的情况下使用正常的JavaScript实现你的目标。

现在newBtn与html_btn链接，你可以像你想要的那样样式你的新btn:D

这周我还需要自定义按钮，并在旁边显示所选的文件名，所以在阅读了上面的一些答案后(谢谢BTW)，我想出了以下实现:

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(角)

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

        $scope.fileName = 'No file chosen';

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

基本上我正在使用ng-file-upload lib, angular方面，我将文件名绑定到我的$作用域，并给它的初始值为'No file selected '，我还将onFileSelect()函数绑定到我的作用域，因此当一个文件被选中时，我使用ng-upload API获取文件名并将其分配给$scope.filename。

这种方法为您提供了完全的灵活性!ES6 / VanillaJS!

html:

<input type="file" style="display:none;"></input>
<button>Upload file</button>

javascript:

document.querySelector('button').addEventListener('click', () => {
  document.querySelector('input[type="file"]').click();
});

这隐藏了输入文件按钮，但实际上是从另一个普通按钮点击它，显然您可以像设置其他按钮一样设置它的样式。这是除了无用的dom节点之外没有任何缺点的唯一解决方案。多亏了display:none;，输入按钮在DOM中不保留任何可见空间。

(我已经不知道该支持谁了。但我是从Stackoverflow网站的某个地方得到这个想法的。)

这是一个纯CSS，无javascript，无bootstrap, 100%跨浏览器的解决方案!只需剪切粘贴一个样式块，然后测试您的文件上传控制。

这个解决方案不像其他文章那样试图隐藏然后重新创建原始HTML元素。它使用纯CSS，没有任何马戏团技巧或第三方工具，为所有主要浏览器设置原始文件上传表单控件的样式。你甚至不需要改变你的HTML代码!只需剪切并粘贴下面的代码到你的网页来测试它…

<style>
/* Note: This CSS will style all instances of 
   <input type=file /> controls in your website. */
input[type="file"],
input[type="file"]:visited,
input[type="file"]:hover,
input[type="file"]:focus,
input[type="file"]:active {
    margin:0;
    padding: 0em 0em;/* fallback: older browsers like IE 1-8 need "em" */
    padding: 0rem 0rem;/* older browsers dont know what "rem" is */
    overflow: hidden; /* long file names overflow so just hide the end */
    background: #fff;
    border-radius: .2em;
    border-radius: .2rem;
    outline: none;
    border: 2px solid #bbb;
    cursor: pointer;
    -webkit-appearance: textfield;
    -moz-appearance: textfield;
}

input[type="file"]:hover {
    background: #f9f9ff; /* Optional rollover color: I am using a light blue to indicate an interaction */
    border: 2px solid #999;
}

input[type="file"]:visited,
input[type="file"]:focus,
input[type="file"]:active {
    background: #fff; /* Default back to white when focused. */
    border: 2px solid #999;
}

/* Note: These "disabled" selectors blow up in IE so have to be separated from the same styles above. */
input[type="file"]:disabled {
    margin: 0;
    padding: 0em 0em;
    padding: 0rem 0rem;
    overflow: hidden; /* long file names overflow so just hide the end */
    background: #ddd;
    border-radius: .2em;
    border-radius: .2rem;
    outline: none;
    border: 2px solid #bbb;
    cursor: pointer;
    -webkit-appearance: textfield;
    -moz-appearance: textfield;
}

input[type="file"]:disabled:hover {
    background: #ddd; /* disabled-readonly buttons should be grey */
    border: 2px solid #999;
}

input[type="file"]:disabled:visited,
input[type="file"]:disabled:focus,
input[type="file"]:disabled:active {
    background: #ddd; /* disabled-readonly buttons should be grey */
    border: 2px solid #999;
}

/* IE UPLOAD BUTTON STYLE: This attempts to alter the file upload button style in IE.  Keep in mind IE gives you limited design control but at least you can customize its upload button.*/
::-ms-browse { /* IE */
    display: inline-block;
    margin: 0;
    padding: .2em .5em;
    padding: .2rem .5rem;
    text-align: center;
    outline: none;
    border: none;
    background: #fff;
    white-space: nowrap;
    cursor: pointer;
}
/* FIREFOX UPLOAD BUTTON STYLE */
::file-selector-button {/* firefox */
    display: inline-block;
    margin: 0rem 1rem 0rem 0rem;
    padding: .18em .5em;
    padding: .18rem .5rem;
    -webkit-appearance: button;
    text-align: center;
    border-radius: .1rem 0rem 0rem .1rem;
    outline: none;
    border: none;
    border-right: 2px solid #bbb;
    background: #eee;
    white-space: nowrap;
    cursor: pointer;
}
/* CHROME AND EDGE UPLOAD BUTTON STYLE */
::-webkit-file-upload-button { /* chrome and edge */
    display: inline-block;
    margin: 0rem 1rem 0rem 0rem;
    padding: .19em .5em;
    padding: .19rem .5rem;
    -webkit-appearance: button;
    text-align: center;
    border-radius: .1rem 0rem 0rem .1rem;
    outline: none;
    border: none;
    border-right: 2px solid #bbb;
    background: #eee;
    white-space: nowrap;
    cursor: pointer;
}
</style>

<input type="file" id="fileupload" name="fileupload" 
value="" tabindex="0" enctype="multipart/form-data" 
accept="image/*" autocomplete="off" multiple="multiple" 
aria-multiselectable="true" title="Multiple File Upload" 
aria-label="Multiple File Upload" />

<br /><br />

<input disabled="disabled" type="file" id="fileupload" 
name="fileupload" value="" tabindex="0" 
enctype="multipart/form-data" accept="image/*" 
autocomplete="off" multiple="multiple" 
aria-multiselectable="true" title="Disabled Multiple File Upload" 
aria-label="Disabled Multiple File Upload" />

这是文件上传控件在Firefox、Chrome和Edge中使用下面的CSS的样子。这是一个非常简单干净的设计。你可以把它变成你喜欢的样子:

Internet Explorer为您提供了有限的设计控制，但至少您可以使用CSS操作控件来更改一些东西，包括圆形边框和颜色:

我的解决方案的优点是:

You stick with simple CSS to style the original HTML input control You can see one or more file names in the file input textbox Screen readers and ARIA-friendly devices can interact normally with your file upload control You can set tabindex on your HTML element so its part of the tab order Because you are using plain HTML and CSS, your file input button works perfectly in old and new browsers ZERO JavaScript required! Runs and loads lighting fast in even the oldest of browsers Because your are not using "display:none" to hide the control, its file block stream data is never disabled from reaching the server in any old or new browser version known

你不需要愚蠢的JavaScript技巧，Bootstrap，或尝试隐藏/重新创建你的文件输入控件。这只会破坏所有在线用户的可用性。样式化原始HTML控件意味着你的文件上传控件在25年的新老浏览器中都能很好地工作。

This is why you cannot trust all these scripted hacks here that erase, rewrite, or destroy HTML just to try and recreate some visual experience. That shows that you do not understand how HTML is used or why its been around for 30 years practically unchanged. You should never try and rewrite HTML's native form control functionality. Why? There is more to using natural HTML in websites than just manipulation of markup for some forced visual experience. The trade-offs of limited visual design in these replaced HTML elements was designed that way for a reason.

我的建议是:坚持使用简单的HTML和CSS解决方案，作为web开发人员，你将没有任何问题。

可能会有很多牛角。但我喜欢在纯CSS中使用fa-buttons:

.divs { position: relative; display: inline-block; background-color: #fcc; } .inputs { position:absolute; left: 0px; height: 100%; width: 100%; opacity: 0; background: #00f; z-index:999; } .icons { position:relative; } <div class="divs"> <input type='file' id='image' class="inputs"> <i class="fa fa-image fa-2x icons"></i> </div> <div class="divs"> <input type='file' id='book' class="inputs"> <i class="fa fa-book fa-5x icons"></i> </div> <br><br><br> <div class="divs"> <input type='file' id='data' class="inputs"> <i class="fa fa-id-card fa-3x icons"></i> </div> <link href="https://maxcdn.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css" rel="stylesheet"/>

小提琴:https://jsfiddle.net/zoutepopcorn/v2zkbpay/1/