javascriptimagepreviewcreateobject

Javascript upload image preview without backend


I am trying to preview photos. Whenever I click browse input and select image - image appears in HTML but when I click browse again and select another picture - first picture gets deleted and replaced with new output.innerHTML. Is there a way to keep old one and keep stacking them up? I am super new to JS, been trying to find a solution for a while but everyone suggests to use PHP and upload to DB, I could do that but I've been asked to make it only with vanillaJS.

<form id="form" method="post" onchange="loadFile(event)">
    <label for="name">File name:</label>
    <input type="text" id="name" placeholder="Test" value="">

    <label for="description">Description:</label>
    <textarea name="" id="description" cols="30" rows="5" placeholder="Alex" value=""></textarea>

    <label for="file">Upload photo:</label>
    <input type="text" id="browse" placeholder="No file selected" disabled>
    <input type="button" value="Browse" id="loadFilesXml" onclick="document.getElementById('file').click();">
    <input type="file" style="display:none;" id="file" name="file" accept="image/*">

    <div class="flex">
      <input type="submit" name="submit" id="submit" value="Upload">
    </div>
  </form>

  <script>
     let loadFile = function(event) {
     let output = document.getElementById("gallery")
     let src = URL.createObjectURL(event.target.files[0]);
     output.innerHTML = "<div><img src='"+src+"'></div>"
   };
  </script>

Solution

  • You can do it like below:

    <form id="form" method="post">
        <label for="name">File name:</label>
        <input type="text" id="name" placeholder="Test" value="">
    
        <label for="description">Description:</label>
        <textarea name="" id="description" cols="30" rows="5" placeholder="Alex" value=""></textarea>
    
        <label for="file">Upload photo:</label>
        <input type="text" id="browse" placeholder="No file selected" disabled>
        <input type="button" value="Browse" id="loadFilesXml" onclick="document.getElementById('file').click();">
        <input type="file" style="display:none;" id="file" name="file" accept="image/*">
    
        <div class="flex">
          <input type="button" name="submit" id="submit" value="Upload" onclick="loadFile(event);">
        </div>
      </form>
    
      <div id="gallery"></div>
    
      <script>
         let loadFile = function(event){
             let output = document.getElementById("gallery");
             let file = document.getElementById("file");
             let src = URL.createObjectURL(file.files[0]);
             //output.innerHTML = "<div><img src='"+src+"'></div>";
    
             var e = document.createElement('div');
             e.innerHTML = "<img src='"+src+"'></div>";
             while(e.firstChild) {
                output.appendChild(e.firstChild);
            }
    
    
       };
      </script>
    

    Add css style(s) to beautify, resize as you please.