123

Pen Settings

CSS Base

Vendor Prefixing

Add External Stylesheets/Pens

Any URL's added here will be added as <link>s in order, and before the CSS in the editor. If you link to another Pen, it will include the CSS from that Pen. If the preprocessor matches, it will attempt to combine them before processing.

+ add another resource

You're using npm packages, so we've auto-selected Babel for you here, which we require to process imports and make it all work. If you need to use a different JavaScript preprocessor, remove the packages in the npm tab.

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

Use npm Packages

We can make npm packages available for you to use in your JavaScript. We use webpack to prepare them and make them available to import. We'll also process your JavaScript with Babel.

⚠️ This feature can only be used by logged in users.

Code Indentation

     

Save Automatically?

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.

HTML Settings

Here you can Sed posuere consectetur est at lobortis. Donec ullamcorper nulla non metus auctor fringilla. Maecenas sed diam eget risus varius blandit sit amet non magna. Donec id elit non mi porta gravida at eget metus. Praesent commodo cursus magna, vel scelerisque nisl consectetur et.

            
              <div class="container" id="container"><div id="grid" class="grid"></div></div>
            
          
!
            
              * {
  box-sizing: border-box;
}
body {
  margin: 0;
  padding: 0;
  overflow: hidden;
}
span {
  position: fixed;
  z-index: 5000;
  top: 0;
  left: 0;
  width: 50px;
  height: 50px;
  background: white;
}
.container {
  top: 0;
  left: 0;
  position: fixed;
  display: block;
  overflow:hidden;
  width: 100%;
  height: 100vh;
}
.grid {
  display: grid;
  width: 100%;
  height: 100%;
  overflow: hidden;
  curser: grab;
}
.grid:active{
  cursor: grabbing;
}

.grid-item {
  background: #fffff05;
  background-size: cover;
  user-select: none;
  pointer-events: none;
  overflow: hidden;
  background-position: 50%;
}
.grid-item img {
  width: 100%;
  height: 100%;
}
            
          
!
            
              // Uses css grid for the items for no apparent reason
// Original idea, with less issues from https://codepen.io/radixzz/pen/eRJKXy

console.clear();

let photos = Array.from({length: 26}, (v,i)=> i).map( i => `https://anemolo-codepen.s3.amazonaws.com/thumb_${i}.jpg` ) 
// The infinite grid changes the img.src for all images on a jump.
// And downloading that new images shows a flash. Even if it's a blob, or saved on storage
// So, I just convert the images > blobs > dataURI to make the flash go away.
// The drawback is that it doesn't work with large images
photos = photos.map( (src,i) => {
  return fetch(src).then(r => r.blob()).then((blob)=>{
    // Yolo swag blobs
    let reader  =  new FileReader();
    reader.readAsDataURL(blob);
    
    return new Promise( (resolve, reject) =>{
      reader.onload = function(){
        resolve(reader.result);
        //Hopefully this does not cause a memory leak :b
        photos[i] = reader.result;
      }
      reader.onerror = function(){
        reject('Error on reader');
        //Hopefully this does not cause a memory leak :b
        photos[i] = '';
      }
    });
  })
})


class GridItem  {
  constructor(index = 0){
    this.item = document.createElement('div');
    // this.item.append(document)
    this.img = document.createElement('img');
    this.index = index;
    this.setImage();
    // console.log(index)
    
    
    // this.item.append(this.img);
    this.item.classList.add('grid-item');
  }
  setIndex(index){
    this.index = index;
    this.setImage()
  }
  setImage(){
    let image = photos[(this.index % photos.length)];
    if(Object.prototype.toString.call(image) === "[object String]" ){
      this.item.style.backgroundImage = `url(${image})`;
    } else {
      image.then((src)=>{
        this.item.style.backgroundImage = `url(${src})`;
      })
    }
  }
}
class Drag {
  constructor(ele, handleDrag){
     this.dragging = false;
    this.lastX = null;
    this.lastY = null;
    this.handleDrag = handleDrag;
    
    ele.addEventListener('touchstart', this.onStart.bind(this), false);
    ele.addEventListener('touchmove', this.onMove.bind(this), false);
    ele.addEventListener('touchend', this.onEnd.bind(this), false);
    
    ele.addEventListener('mousedown', this.onStart.bind(this))
    ele.addEventListener('mousemove', this.onMove.bind(this));
    ele.addEventListener('mouseup', this.onEnd.bind(this));
    ele.addEventListener('mouseuot', this.onEnd.bind(this));
  }
  onStart(ev){
    ev = ev.type == 'touchstart' ? ev.touches[0] : ev;
    
    this.dragging = true;
    this.lastX = ev.clientX;
    this.lastY = ev.clientY;
    
  }
  onMove(ev){
    
    if(!this.dragging) return; 
    
    
    ev = ev.type == "touchmove" ? ev.touches[ 0 ] : ev;
    let xDelta = ev.clientX - this.lastX;
    let yDelta = ev.clientY - this.lastY;
    let vel = Math.abs(xDelta * yDelta);
    if(vel > 50){
      let v = {x: xDelta * 0.5, y:yDelta * 0.5};
      if(this.anime) this.anime.pause();
      this.anime = anime(
      {targets: v,
        x: 0,
        y: 0,
       update: (anim)=>{
         this.handleDrag(v.x,v.y)
       }
      }
      )
    }
    this.handleDrag(xDelta, yDelta);
    this.lastX = ev.clientX;
    this.lastY = ev.clientY;
    
  }
  onEnd(ev){
    this.dragging = false;
    
  }
}
class InfiniteGrid {
  constructor(nCol = 2, nRow = 2){
    this.grid = document.getElementById('grid');
    this.container = document.getElementById('container');
    this.Drag = new Drag(this.container, this.onDrag.bind(this));
    this.offsetX = 0;
    this.offsetY = 0;
    // Overshoot items
    this.items = [];
    this.setGrid(nCol,nRow);
    
    
    
  }
  onDrag(xDelta, yDelta){
    this.offsetX += xDelta;
    this.offsetY += yDelta;
    
    // Move the grid back by 1 item whenever it goes over 1/2 of an item
    // Making the movement invisible
    const itemWidth = 100./this.cols;
    const itemHeight = 100./this.rows;
    const pixelWidth = (itemWidth * window.innerWidth) / 100;
    const pixelHeight = (itemHeight * window.innerHeight) / 100;
    let jumpX = null;
    let jumpY = null;
    if(Math.abs(this.offsetX) > pixelWidth/2.){
      this.offsetX -= pixelWidth* Math.sign(this.offsetX);
      jumpX = Math.sign(this.offsetX);
    }
    if(Math.abs(this.offsetY) > pixelHeight/2.){
      this.offsetY -= pixelHeight * Math.sign(this.offsetY);
      jumpY = Math.sign(this.offsetY);
    }
    // console.log(this.rows, this.cols, jumpY)
    if(jumpX || jumpY){
      this.items.forEach(item => {
        if(jumpX) item.setIndex(this.shiftIndex(item.index + jumpX));
        if(jumpY) item.setIndex(this.shiftIndex(item.index + jumpY * (this.cols +2 )));
      })
    }
    
    this.grid.style.transform = `translate(${this.offsetX}px,${this.offsetY}px)`;
  }
  shiftIndex(index){
    if(index < 0 ){
      index = this.items.length + index;
    }
    index = index % this.items.length;
    
    return index;
  }
  
  setGrid(nCol = 2, nRow = 2) {            
    if(nCol === this.cols && nRow === this.rows) return;
    
    // Overshoot items
    const cols = nCol + 2;
    const rows = nRow + 2;
    // Add space for 2 more rows and columns using the current col/row size
    this.container.style.width = `${100 + 100/nCol*2.}vw`;
    this.container.style.height = `${100 + 100/nRow*2.}vh`;
     // Move the grid back by 1 col and row
    this.container.style.transform = `translate(${-100/nCol}vw, ${-100/nRow}vh)`
    
    // Do everything else taking into account the overshoot items
    this.grid.style.gridTemplateColumns = Array.from({length: cols}, ()=>'1fr').join(' ');
    this.grid.style.gridTemplateRows =  Array.from({length: rows}, ()=>'1fr').join(' ');
    
    const nItems =  cols * rows;
    this.cols = nCol;
    this.rows = nRow; 
    while(nItems < this.items.length){
    this.grid.removeChild(this.grid.children[this.items.length -1]);
      this.items = this.items.slice(0,this.items.length - 1);
    }
    while(nItems > this.items.length) {
        const item = new GridItem(this.items.length);
        this.items = this.items.concat(item);
        this.grid.append(item.item) 
    }
    
    this.items.forEach((item,index)=>{
      item.setIndex(index);
    })
    
  }
}

const grid = getColsAndRows();
const Infinite = new InfiniteGrid(grid.cols,grid.rows);

window.addEventListener('resize', ()=>{
const aspectRatio = window.innerWidth / window.innerHeight;
  
  const grid = getColsAndRows();
  Infinite.setGrid(grid.cols, grid.rows);
})

function getColsAndRows(){
  let cols = 3;
  let rows = 3;
  if(window.innerWidth > 800){
    cols = 4;
    rows = 4;
  }
  if(window.innerWidth < 500){
    rows = 1;
  }
  
const aspectRatio = window.innerWidth / window.innerHeight;
  
  cols +=  Math.max(0,Math.floor(aspectRatio) - 1);
  rows += Math.max(0, Math.floor(1. / (aspectRatio - 0.4)) -1)
  
  rows = Math.min(5, rows);
  cols = Math.min(8, cols);
  
  return {cols, rows};
}
            
          
!
999px
🕑 One or more of the npm packages you are using needs to be built. You're the first person to ever need it! We're building it right now and your preview will start updating again when it's ready.

Console