Pen Settings

HTML

CSS

CSS Base

Vendor Prefixing

Add External Stylesheets/Pens

Any URLs added here will be added as <link>s in order, and before the CSS in the editor. You can use the CSS from another Pen by using its URL and the proper URL extension.

+ add another resource

JavaScript

Babel includes JSX processing.

Add External Scripts/Pens

Any URL's added here will be added as <script>s in order, and run before the JavaScript in the editor. You can use the URL of any other Pen and it will include the JavaScript from that Pen.

+ add another resource

Packages

Add Packages

Search for and use JavaScript packages from npm here. By selecting a package, an import statement will be added to the top of the JavaScript editor for this package.

Behavior

Auto Save

If active, Pens will autosave every 30 seconds after being saved once.

Auto-Updating Preview

If enabled, the preview panel updates automatically as you code. If disabled, use the "Run" button to update.

Format on Save

If enabled, your code will be formatted when you actively save your Pen. Note: your code becomes un-folded during formatting.

Editor Settings

Code Indentation

Want to change your Syntax Highlighting theme, Fonts and more?

Visit your global Editor Settings.

HTML

              
                p.p-4
  | click right image icon and select movie, pdf or image files.
form#post-form.flex.flex-row.items-center.bottom-0.my-2.mx-2(action='#' method='post' enctype="multipart/form-data"  onsubmit='return false;') 
  .flex.w-full.pl-3.py-3.border.rounded-3xl.items-center.bg-white
        
    #message-content.overflow-y-scroll.max-h-60.w-full(name='content' contenteditable='true' class='focus:outline-none' placeholder="input message..." )

    .flex
      input#message-files.hidden(type='file' name='message-files[]' accept='image/*,application/pdf,text/plain,video/*,audio/*' multiple='multiple')

      button#message-image-btn.flex.items-center.justify-center.w-10.text-green-400(class='focus:outline-none hover:text-green-600')
        svg.w-5.h-5(fill='none', stroke='currentColor', viewbox='0 0 24 24', xmlns='http://www.w3.org/2000/svg')
          path(stroke-linecap='round', stroke-linejoin='round', stroke-width='2', d='M4 16l4.586-4.586a2 2 0 012.828 0L16 16m-2-2l1.586-1.586a2 2 0 012.828 0L20 14m-6-6h.01M6 20h12a2 2 0 002-2V6a2 2 0 00-2-2H6a2 2 0 00-2 2v12a2 2 0 002 2z')

      button#message-submit-btn.flex.items-center.justify-center.h-10.w-10.mr-2.rounded-full.bg-blue-500.text-white(class='hover:bg-gray-300 focus:outline-none')
        svg.w-5.h-5.transform.rotate-90.-mr-px(fill='none', stroke='currentColor', viewbox='0 0 24 24', xmlns='http://www.w3.org/2000/svg')
          path(stroke-linecap='round', stroke-linejoin='round', stroke-width='2', d='M12 19l9 2-9-18-9 18 9-2zm0 0v-8')

              
            
!

CSS

              
                /* import tailwind CSS */

/* like placeholder */
[contenteditable=true]:empty:before {
content: attr(placeholder);
opacity: 0.5;
pointer-events: none;
display:block;
}

/* set image size */
[contenteditable=true] img{ max-width:80%;border:1px solid #DDD;max-height:120px;}
              
            
!

JS

              
                /** import external script : pdf.js
 * ------------------------------
 * Reference links the below 
 * ------------------------------
 * PDF : https://mozilla.github.io/pdf.js/examples/index.html#interactive-examples
 * Movie : https://stackoverflow.com/questions/50842933/how-to-display-thumnail-or-preview-for-current-file-upload
*/

// save time to write document.querySelectorAll
const $ = (selector)=>{
    const elements = document.querySelectorAll(selector);
    if(!elements.length) return;
    else if(elements.length===1) return elements[0];
    else return elements;
};


$('#message-image-btn').addEventListener('click',()=>{
  $('#message-files').dispatchEvent(new MouseEvent('click'));
  return false;
});

function insertPdfPreviewImg(input_file,target_element,callback){
  const pdfjsLib = window['pdfjs-dist/build/pdf'];
  pdfjsLib.GlobalWorkerOptions.workerSrc = 'https://cdnjs.cloudflare.com/ajax/libs/pdf.js/2.11.338/pdf.worker.min.js';

  const reader = new FileReader();
  reader.readAsArrayBuffer(input_file);
  reader.onload= e => {
    const pdfData = new Uint8Array(e.target.result);
    var loadingTask = pdfjsLib.getDocument({data: pdfData});
    loadingTask.promise.then(function(pdf) {
      console.log('PDF loaded');

      var pageNumber = 1;
      pdf.getPage(pageNumber).then((page) => {
        //- console.log('PDF Page loaded');
        const viewport = page.getViewport({scale: 1});
        const canvas = document.createElement('canvas');
        const context = canvas.getContext('2d');
        canvas.height = viewport.height;
        canvas.width = viewport.width;

        const renderContext = {
          canvasContext: context,
          viewport: viewport
        };
        const renderTask = page.render(renderContext);
        renderTask.promise.then(function () {
          const image = document.createElement('img');
          image.style.cursor='pointer';
          image.className='preview pdf';
          image.src = canvas.toDataURL();
          target_element.appendChild(image);
          if(callback) callback(image);
        });
      });
    },  err => console.error );
  }
}

function insertImagePreviewImg(input_file,target_element,callback){
  const reader = new FileReader();
  reader.readAsDataURL(input_file);
  reader.onload= e => {
    const result = e.target.result;
    const image = document.createElement('img');
    image.style.cursor='pointer';
    image.className='preview image';
    image.src = result;

    target_element.appendChild(image);
    if(callback) callback(image);
  }
}

function insertVideoPreviewImg(input_file,target_element,callback){
  const reader = new FileReader();
  reader.readAsDataURL(input_file);
  reader.onload= e => {
    const result = e.target.result;
    const canvas = document.createElement('canvas');
    const image = document.createElement('img');
    const video = document.createElement('video');
    const source = document.createElement('source');
    source.src = URL.createObjectURL(input_file);
    video.appendChild(source);
    video.addEventListener('loadedmetadata',e=>{
      const v = e.target;
      const duration = v.duration;
      canvas.width = v.videoWidth;
      canvas.height = v.videoHeight;
      video.currentTime = Math.ceil(duration/2);
      video.addEventListener('timeupdate',()=>{
        const ctx = canvas.getContext('2d');
        ctx.drawImage(video,0,0,v.videoWidth,v.videoHeight);

        image.style.cursor='pointer';
        image.className='preview movie';
        image.src = canvas.toDataURL();

        target_element.appendChild(image);
        if(callback) callback(image);
      },{once:true});
    })


  }
}
$('#message-files').onchange = e =>{
  const input = e.target;
  const files = e.target.files;

  if(FileReader && files && files.length){
    const target_element = $('#message-content');
    for ( var i = 0; file= files[i]; i++ ) {
      if(file.type==='application/pdf') {
        insertPdfPreviewImg(file,target_element);
      }else if(file.type.indexOf('video/')!==-1) {
        insertVideoPreviewImg(file,target_element);
      } else if(file.type.indexOf('image/')!==-1){
        insertImagePreviewImg(file,target_element);
      }
    }

  }
}
              
            
!
999px

Console