文件上传（File upload）

不用 JavaScript 定制文件上传（file upload）输入框

file 元素是封装了 <input type="file"> 的简单的互动标签。它包含几个子元素：

  • file 是主容器
    • file-label 是实际互动和可点击的元素
      • file-input 是原生的文件输入框，基于美化目的已隐藏
      • file-cta 上传调用操作
        • file-icon 是可选的上传图标
        • file-label 显示文字“选择一个文件……”
      • file-name 一个包含选择的文件名字的容器

示例

HTML 

<div class="file">
  <label class="file-label">
    <input class="file-input" type="file" name="resume">
    <span class="file-cta">
      <span class="file-icon">
        <i class="fas fa-upload"></i>
      </span>
      <span class="file-label">
        Choose a file…
      </span>
    </span>
  </label>
</div>

Modifiers #

联合使用 has-name 修饰符和 file-name 元素，您可以为选择的文件名添加一个占位符。 

<div class="file has-name">
  <label class="file-label">
    <input class="file-input" type="file" name="resume">
    <span class="file-cta">
      <span class="file-icon">
        <i class="fas fa-upload"></i>
      </span>
      <span class="file-label">
        Choose a file…
      </span>
    </span>
    <span class="file-name">
      Screen Shot 2017-07-29 at 15.54.25.png
    </span>
  </label>
</div>

您可以使用 is-right 修饰符将 CTA 移动到右侧。 

<div class="file has-name is-right">
  <label class="file-label">
    <input class="file-input" type="file" name="resume">
    <span class="file-cta">
      <span class="file-icon">
        <i class="fas fa-upload"></i>
      </span>
      <span class="file-label">
        Choose a file…
      </span>
    </span>
    <span class="file-name">
      Screen Shot 2017-07-29 at 15.54.25.png
    </span>
  </label>
</div>

也可以用 is-fullwidth 修饰符扩展名字占满全部宽度。 

<div class="file has-name is-fullwidth">
  <label class="file-label">
    <input class="file-input" type="file" name="resume">
    <span class="file-cta">
      <span class="file-icon">
        <i class="fas fa-upload"></i>
      </span>
      <span class="file-label">
        Choose a file…
      </span>
    </span>
    <span class="file-name">
      Screen Shot 2017-07-29 at 15.54.25.png
    </span>
  </label>
</div>

您还可以用 is-boxed 修饰符得到一个盒状块。 

<div class="file is-boxed">
  <label class="file-label">
    <input class="file-input" type="file" name="resume">
    <span class="file-cta">
      <span class="file-icon">
        <i class="fas fa-upload"></i>
      </span>
      <span class="file-label">
        Choose a file…
      </span>
    </span>
  </label>
</div>

也可以联合使用 has-name 和 is-boxed。 

<div class="file has-name is-boxed">
  <label class="file-label">
    <input class="file-input" type="file" name="resume">
    <span class="file-cta">
      <span class="file-icon">
        <i class="fas fa-upload"></i>
      </span>
      <span class="file-label">
        Choose a file…
      </span>
    </span>
    <span class="file-name">
      Screen Shot 2017-07-29 at 15.54.25.png
    </span>
  </label>
</div>

颜色 #

您可以通过添加一个 10 颜色修饰符之一美化文件上传元素：

  • is-white
  • is-black
  • is-light
  • is-dark
  • is-primary
  • is-link
  • is-info
  • is-success
  • is-warning
  • is-danger

示例

HTML 

<div class="file is-primary">
  <label class="file-label">
    <input class="file-input" type="file" name="resume">
    <span class="file-cta">
      <span class="file-icon">
        <i class="fas fa-upload"></i>
      </span>
      <span class="file-label">
        Primary file…
      </span>
    </span>
  </label>
</div>

示例

HTML 

<div class="file is-info has-name">
  <label class="file-label">
    <input class="file-input" type="file" name="resume">
    <span class="file-cta">
      <span class="file-icon">
        <i class="fas fa-upload"></i>
      </span>
      <span class="file-label">
        Info file…
      </span>
    </span>
    <span class="file-name">
      Screen Shot 2017-07-29 at 15.54.25.png
    </span>
  </label>
</div>

示例

HTML 

<div class="file is-warning is-boxed">
  <label class="file-label">
    <input class="file-input" type="file" name="resume">
    <span class="file-cta">
      <span class="file-icon">
        <i class="fas fa-cloud-upload-alt"></i>
      </span>
      <span class="file-label">
        Warning file…
      </span>
    </span>
  </label>
</div>

示例

HTML 

<div class="file is-danger has-name is-boxed">
  <label class="file-label">
    <input class="file-input" type="file" name="resume">
    <span class="file-cta">
      <span class="file-icon">
        <i class="fas fa-cloud-upload-alt"></i>
      </span>
      <span class="file-label">
        Danger file…
      </span>
    </span>
    <span class="file-name">
      Screen Shot 2017-07-29 at 15.54.25.png
    </span>
  </label>
</div>

型号 #

您可以附加 4 个可用型号之一：

  • is-small
  • is-normal （默认）
  • is-medium
  • is-large

示例

HTML 

<div class="file is-small">
  <label class="file-label">
    <input class="file-input" type="file" name="resume">
    <span class="file-cta">
      <span class="file-icon">
        <i class="fas fa-upload"></i>
      </span>
      <span class="file-label">
        Small file…
      </span>
    </span>
  </label>
</div>

示例

HTML 

<div class="file is-normal">
  <label class="file-label">
    <input class="file-input" type="file" name="resume">
    <span class="file-cta">
      <span class="file-icon">
        <i class="fas fa-upload"></i>
      </span>
      <span class="file-label">
        Normal file…
      </span>
    </span>
  </label>
</div>

示例

HTML 

<div class="file is-medium">
  <label class="file-label">
    <input class="file-input" type="file" name="resume">
    <span class="file-cta">
      <span class="file-icon">
        <i class="fas fa-upload"></i>
      </span>
      <span class="file-label">
        Medium file…
      </span>
    </span>
  </label>
</div>

示例

HTML 

<div class="file is-large">
  <label class="file-label">
    <input class="file-input" type="file" name="resume">
    <span class="file-cta">
      <span class="file-icon">
        <i class="fas fa-upload"></i>
      </span>
      <span class="file-label">
        Large file…
      </span>
    </span>
  </label>
</div>

示例

HTML 

<div class="file is-small has-name">
  <label class="file-label">
    <input class="file-input" type="file" name="resume">
    <span class="file-cta">
      <span class="file-icon">
        <i class="fas fa-upload"></i>
      </span>
      <span class="file-label">
        Small file…
      </span>
    </span>
    <span class="file-name">
      Screen Shot 2017-07-29 at 15.54.25.png
    </span>
  </label>
</div>

示例

HTML 

<div class="file is-normal has-name">
  <label class="file-label">
    <input class="file-input" type="file" name="resume">
    <span class="file-cta">
      <span class="file-icon">
        <i class="fas fa-upload"></i>
      </span>
      <span class="file-label">
        Normal file…
      </span>
    </span>
    <span class="file-name">
      Screen Shot 2017-07-29 at 15.54.25.png
    </span>
  </label>
</div>

示例

HTML 

<div class="file is-medium has-name">
  <label class="file-label">
    <input class="file-input" type="file" name="resume">
    <span class="file-cta">
      <span class="file-icon">
        <i class="fas fa-upload"></i>
      </span>
      <span class="file-label">
        Medium file…
      </span>
    </span>
    <span class="file-name">
      Screen Shot 2017-07-29 at 15.54.25.png
    </span>
  </label>
</div>

示例

HTML 

<div class="file is-large has-name">
  <label class="file-label">
    <input class="file-input" type="file" name="resume">
    <span class="file-cta">
      <span class="file-icon">
        <i class="fas fa-upload"></i>
      </span>
      <span class="file-label">
        Large file…
      </span>
    </span>
    <span class="file-name">
      Screen Shot 2017-07-29 at 15.54.25.png
    </span>
  </label>
</div>

示例

HTML 

<div class="file is-small is-boxed">
  <label class="file-label">
    <input class="file-input" type="file" name="resume">
    <span class="file-cta">
      <span class="file-icon">
        <i class="fas fa-upload"></i>
      </span>
      <span class="file-label">
        Small file…
      </span>
    </span>
  </label>
</div>

示例

HTML 

<div class="file is-normal is-boxed">
  <label class="file-label">
    <input class="file-input" type="file" name="resume">
    <span class="file-cta">
      <span class="file-icon">
        <i class="fas fa-upload"></i>
      </span>
      <span class="file-label">
        Normal file…
      </span>
    </span>
  </label>
</div>

示例

HTML 

<div class="file is-medium is-boxed">
  <label class="file-label">
    <input class="file-input" type="file" name="resume">
    <span class="file-cta">
      <span class="file-icon">
        <i class="fas fa-upload"></i>
      </span>
      <span class="file-label">
        Medium file…
      </span>
    </span>
  </label>
</div>

示例

HTML 

<div class="file is-large is-boxed">
  <label class="file-label">
    <input class="file-input" type="file" name="resume">
    <span class="file-cta">
      <span class="file-icon">
        <i class="fas fa-upload"></i>
      </span>
      <span class="file-label">
        Large file…
      </span>
    </span>
  </label>
</div>

示例

HTML 

<div class="file is-small is-boxed has-name">
  <label class="file-label">
    <input class="file-input" type="file" name="resume">
    <span class="file-cta">
      <span class="file-icon">
        <i class="fas fa-upload"></i>
      </span>
      <span class="file-label">
        Small file…
      </span>
    </span>
    <span class="file-name">
      Screen Shot 2017-07-29 at 15.54.25.png
    </span>
  </label>
</div>

示例

HTML 

<div class="file is-normal is-boxed has-name">
  <label class="file-label">
    <input class="file-input" type="file" name="resume">
    <span class="file-cta">
      <span class="file-icon">
        <i class="fas fa-upload"></i>
      </span>
      <span class="file-label">
        Normal file…
      </span>
    </span>
    <span class="file-name">
      Screen Shot 2017-07-29 at 15.54.25.png
    </span>
  </label>
</div>

示例

HTML 

<div class="file is-medium is-boxed has-name">
  <label class="file-label">
    <input class="file-input" type="file" name="resume">
    <span class="file-cta">
      <span class="file-icon">
        <i class="fas fa-upload"></i>
      </span>
      <span class="file-label">
        Medium file…
      </span>
    </span>
    <span class="file-name">
      Screen Shot 2017-07-29 at 15.54.25.png
    </span>
  </label>
</div>

示例

HTML 

<div class="file is-large is-boxed has-name">
  <label class="file-label">
    <input class="file-input" type="file" name="resume">
    <span class="file-cta">
      <span class="file-icon">
        <i class="fas fa-upload"></i>
      </span>
      <span class="file-label">
        Large file…
      </span>
    </span>
    <span class="file-name">
      Screen Shot 2017-07-29 at 15.54.25.png
    </span>
  </label>
</div>

对齐方式 #

您可以对齐文件上传输入框：

  • 用 is-centered 修饰符居中对齐
  • 用 is-right 修饰符向右对齐

示例

HTML 

<div class="file is-centered is-boxed is-success has-name">
  <label class="file-label">
    <input class="file-input" type="file" name="resume">
    <span class="file-cta">
      <span class="file-icon">
        <i class="fas fa-upload"></i>
      </span>
      <span class="file-label">
        Centered file…
      </span>
    </span>
    <span class="file-name">
      Screen Shot 2017-07-29 at 15.54.25.png
    </span>
  </label>
</div>

示例

HTML 

<div class="file is-right is-info">
  <label class="file-label">
    <input class="file-input" type="file" name="resume">
    <span class="file-cta">
      <span class="file-icon">
        <i class="fas fa-upload"></i>
      </span>
      <span class="file-label">
        Right file…
      </span>
    </span>
    <span class="file-name">
      Screen Shot 2017-07-29 at 15.54.25.png
    </span>
  </label>
</div>

JavaScript #

文件上传输入框需要 JavaScript 来获取选择的文件名。 这是一个演示如何运行的示例：

示例

HTML 

<div id="file-js-example" class="file has-name">
  <label class="file-label">
    <input class="file-input" type="file" name="resume">
    <span class="file-cta">
      <span class="file-icon">
        <i class="fas fa-upload"></i>
      </span>
      <span class="file-label">
        Choose a file…
      </span>
    </span>
    <span class="file-name">
      No file uploaded
    </span>
  </label>
</div>

<script>
  const fileInput = document.querySelector('#file-js-example input[type=file]');
  fileInput.onchange = () => {
    if (fileInput.files.length > 0) {
      const fileName = document.querySelector('#file-js-example .file-name');
      fileName.textContent = fileInput.files[0].name;
    }
  }
</script>

Variables #

Name
Type
Value
Computed Value
Computed Type 
$file-border-color
variable
$border
hsl(0, 0%, 86%)
color
$file-radius
variable
$radius
4px
size
$file-cta-background-color
variable
$white-ter
hsl(0, 0%, 96%)
color
$file-cta-color
variable
$grey-dark
hsl(0, 0%, 29%)
color
$file-cta-hover-color
variable
$grey-darker
hsl(0, 0%, 21%)
color
$file-cta-active-color
variable
$grey-darker
hsl(0, 0%, 21%)
color
$file-name-border-color
variable
$border
hsl(0, 0%, 86%)
color
$file-name-border-style
string
solid
$file-name-border-width
size
1px 1px 1px 0
$file-name-max-width
size
16em

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