我发现最好的方法是有一个输入类型:文件，然后将其设置为display: none。给它一个id。创建一个按钮或任何您想要打开文件输入的其他元素。

然后在它(按钮)上添加一个事件侦听器，当单击它时，它会模拟对原始文件输入的单击。 比如点击一个名为hello的按钮，但它会打开一个文件窗口。

示例代码

//i am using semantic ui

<button class="ui circular icon button purple send-button" id="send-btn">
      <i class="paper plane icon"></i>
    </button>
  <input type="file" id="file" class="input-file" />

javascript

var attachButton=document.querySelector('.attach-button');
    attachButton.addEventListener('click', e=>{
        $('#file').trigger("click")
    })

$ (' .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

下面是一个解决方案，它还显示了所选的文件名: 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: #ddd;
      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; }

转换文件名的多个文件解决方案

自举例子

HTML:

<div>
  <label class="btn btn-primary search-file-btn">
    <input name="file1" type="file" style="display:None;"> <span>Choose file</span>
  </label>
  <span>No file selected</span>
</div>

<div>
  <label class="btn btn-primary search-file-btn">
    <input name="file2" type="file" style="display:None;"> <span>Choose file</span>
  </label>
  <span>No file selected</span>
</div>

1. jQuery JS:

$().ready(function($){
    $('.search-file-btn').children("input").bind('change', function() {
    var fileName = '';
    fileName = $(this).val().split("\\").slice(-1)[0];
    $(this).parent().next("span").html(fileName);
  })
});

2. JS没有jQuery

Array.prototype.forEach.call(document.getElementsByTagName('input'), function(item) {
  item.addEventListener("change", function() {
    var fileName = '';
    fileName = this.value.split("\\").slice(-1)[0];
    this.parentNode.nextElementSibling.innerHTML = fileName;
  });
});

一个图像上传应用程序的演示，适用于大多数后端良好的动画功能。

// common function render_element(styles, el) { for (const [kk, vv] of Object.entries(styles)) { el.style[kk] = vv; } } function hoverOpacity(el) { el.addEventListener('mouseenter', function() { el.style.opacity = 0.75 }.bind(el)); el.addEventListener('mouseleave', function() { el.style.opacity = 1 }.bind(el)); } // return void event handler on setTimeout function buffer(func, time){ return e=>{ if(func.still)return; // first runtime if(!func.pft){ func(e); func.pft = true; func.still = false; return; } func.still = true; setTimeout(e=>{ func(e); func.still = false; }, time); } } // end of common const imageUploadButton = document.getElementById('image-upload-button'); imageUploadButton.addEventListener('click', e=>{ // pulse animation total time const d1 = document.getElementById('image-form'); let time = 600; if(d1.rendered){ d1.ready(); }else{ d1.ready = function(){ d1.style.display = 'flex'; d1.style.background = '#c5edd0'; this.d2.style.background = '#b4dbbf'; this.d3.style.background = '#95dea9'; this.d4.innerHTML = 'Drag and Drop or Click Above to Upload'; } let dismiss_btn = document.createElement('div'); render_element({ position: 'absolute', height: '30px', width: '30px', top: '0', right: '0', background: '#fff', borderRadius: '30px', cursor: 'pointer', margin: '2px', zIndex: '10', }, dismiss_btn); dismiss_btn.addEventListener('mouseenter', function(){this.style.background = '#fc4f30'}); dismiss_btn.addEventListener('mouseleave', function(){this.style.background = '#fff'}); dismiss_btn.addEventListener('click', ()=>{d1.style.display = 'none'}); d1.appendChild(dismiss_btn); const d3 = d1.querySelector('#image-input'); const d5 = d1.querySelector('#image-submit'); d5.style.visibility = 'hidden'; d1.parentNode.removeChild(d1); document.body.appendChild(d1); d1.removeChild(d3); let [ d2, d4, ] = Array.from({length: 3}, ()=>document.createElement('div')); let width = window.innerWidth; let d_styles = { display: 'flex', justifyContent: 'center', alignItems: 'center', }; render_element({ position: 'fixed', left: ((width - 430) / 2).toString() + 'px', width: '430px', top: '60px', height: '280px', zIndex: '10', }, d1); render_element(d_styles, d1); render_element({ width: '90%', height: '90%', }, d2); render_element(d_styles, d2); render_element({ width: '80%', height: '70%', fontSize: '0', cursor: 'pointer', }, d3); hoverOpacity(d3); render_element(d_styles, d3); d1.appendChild(d2); d2.appendChild(d3); let tt = time / 3; let ht = tt / 2; d1.addEventListener('dragover', buffer(e=>{ d1.style.background = '#ebf9f0'; setTimeout(()=>{ d1.style.background = '#95dea9'; }, ht); setTimeout(()=>{ d2.style.background = '#b6e3c2'; setTimeout(()=>{ d2.style.background = '#c4eed2'; }, ht); }, tt); setTimeout(()=>{ d3.style.background = '#cae3d1'; setTimeout(()=>{ d3.style.background = '#9ce2b4'; }, ht); }, tt); }, time)); d2.style.flexDirection = 'column'; render_element({ fontSize: '16px', textAlign: 'center', fontFamily: 'Verdana', }, d4); d2.appendChild(d4); d3.addEventListener('change', e=>{ // backend // d5.click(); // if backend succeed, run frontend setTimeout(()=>{ d1.style.background = '#dbcea2'; setTimeout(()=>{ d2.style.background = '#dbc169'; setTimeout(()=>{ d3.style.background = '#ebc034'; }, ht); }, tt); }, time); // display backend path here // now only display filename d4.innerHTML = d3.files[0].name; }); d1.d2 = d2; d1.d3 = d3; d1.d4 = d4; d1.ready(); d1.rendered = true; } }); #image-upload-button{ width: 200px; height: 40px; background: lightgrey; display: flex; align-items: center; justify-content: center; cursor: pointer; } #image-form{ display: none; } ::-webkit-file-upload-button { visibility: hidden; } <div id="image-upload-button">Upload Image <form id="image-form" action="post"> <input id="image-input" type="file" /> <button id="image-submit" type="submit"></button> </form> </div>

你可以创建一个很棒的(未完成的)文件上传器到<button>元素或任何其他元素:

函数selectFile() { . getelementbyid (fileSelector) .click (); ｝ 输入# fileSelector (type = "文件"){ 显示:没有; ｝ 按钮onclick * =”()”){ 光标:指针; ｝ <input type="file" id="fileSelector"> <按钮onclick = " selectFile ()>选择文件从计算机