文件输入字段不是 100% 活动的

Question

我有自定义文件附加字段。它工作正常，但有一点需要修复：字段的右侧完全不活动。此外，如果将光标移到左上角，您会注意到这部分显然处于活动状态，但 CSS "cursor: pointer" 选项没有效果。很确定我错过了一些简单的事情，请告诉我我的错误是什么？先感谢您。 JSFiddle

@import url('https://fonts.googleapis.com/css?family=Roboto:100,300,500&subset=cyrillic');

* {
  margin: 0;
  padding: 0;
}

body, html {
  height: 100%;
}

body {
  color: #fff;
  font-size: 18px;
  font-family: "Roboto";
  font-weight: 100;
  background: #333;
}

body a {
  color:#fff;
  text-decoration: none;
  outline: none;
}

#container {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100%;
}

.file-area {
  width: 450px;
  box-sizing: border-box;
  position: relative;
}
.file-area input[type=file] {
  position: absolute;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  opacity: 0;
  cursor: pointer;
}
.file-area .file-dummy {
  width: 450px;
  padding: 30px;
  background: rgba(75, 58, 38, 0.3);
  border: 1px dashed rgba(255, 255, 255, 0.5);
  text-align: center;
  transition: background 0.3s ease-in-out;
}
.file-area .file-dummy .success {
  display: none;
}
.file-area:hover .file-dummy {
  background: rgba(255, 255, 255, 0.1);
}
.file-area input[type=file]:focus + .file-dummy {
  outline: 2px solid rgba(255, 255, 255, 0.5);
  outline: -webkit-focus-ring-color auto 5px;
  outline: none;
}
.file-area input[type=file]:valid + .file-dummy {
  border-color: rgba(0, 255, 0, 0.4);
  background-color: rgba(0, 255, 0, 0.2);
}
.file-area input[type=file]:valid + .file-dummy .success {
  display: inline-block;
}
.file-area input[type=file]:valid + .file-dummy .default {
  display: none;
}

<div id="container">
  <div class="file-area">  
    <input type="file" name="files" id="files" required="required"/>
    <div class="file-dummy">
      <span class="default">Choose files</span>
      <span class="success">Yahoo!</span>
    </div>
  </div>
</div>

Answer 1

刚刚删除了 .file-area 的宽度，看起来工作正常。

============最新变化================

只是为了改变 cursor: pointer 技巧 font-size:0;

@import url('https://fonts.googleapis.com/css?family=Roboto:100,300,500&subset=cyrillic');

* {
    margin: 0;
    padding: 0;
}

body, html {
    height: 100%;
}

body {
 color: #fff;
 font-size: 18px;
 font-family: "Roboto";
 font-weight: 100;
 background: #333;
}

 body a {
  color:#fff;
  text-decoration: none;
  outline: none;
 }
 
#container {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100%;
}

.file-area {
  box-sizing: border-box;
  position: relative;
}
.file-area input[type=file] {
  position: absolute;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  opacity: 0;
  cursor: pointer;
  font-size:0;
}
.file-area .file-dummy {
  width: 450px;
  padding: 30px;
  background: rgba(75, 58, 38, 0.3);
  border: 1px dashed rgba(255, 255, 255, 0.5);
  text-align: center;
  transition: background 0.3s ease-in-out;
}
.file-area .file-dummy .success {
  display: none;
}
.file-area:hover .file-dummy {
  background: rgba(255, 255, 255, 0.1);
}
.file-area input[type=file]:focus + .file-dummy {
  outline: 2px solid rgba(255, 255, 255, 0.5);
  outline: -webkit-focus-ring-color auto 5px;
  outline: none;
}
.file-area input[type=file]:valid + .file-dummy {
  border-color: rgba(0, 255, 0, 0.4);
  background-color: rgba(0, 255, 0, 0.2);
}
.file-area input[type=file]:valid + .file-dummy .success {
  display: inline-block;
}
.file-area input[type=file]:valid + .file-dummy .default {
  display: none;
}

<div id="container">
 <div class="file-area">  
  <input type="file" name="files" id="files" required="required"/>
  <div class="file-dummy">
   <span class="default">Choose files</span>
   <span class="success">Yahoo!</span>
  </div>
 </div>
</div>

Answer 2

问题只是因为 class file-area 中的固定 width，请尝试删除宽度，希望它能解决您的问题

Updated Fiddle Demo

Answer 3

去掉.file-dummy的宽度应该就解决了

.file-area .file-dummy {
width: 450px;
}

Answer 4

将您的 .file-area class 宽度修改为 100%

Answer 5

您添加 padding 和苹果 width 100%，填充包括宽度。

像这样改变宽度width: calc(100% - 60px);

.file-area .file-dummy {
    background: rgba(75, 58, 38, 0.3) none repeat scroll 0 0;
    border: 1px dashed rgba(255, 255, 255, 0.5);
    padding: 30px;
    text-align: center;
    transition: background 0.3s ease-in-out 0s;
    width: calc(100% - 60px);
}

文件输入字段不是 100% 活动的

File input field is not 100% active

html

css

field

file

input