JSFiddle - React, Tailwind, and code Playground
HTML
<div id="fieldPerimeter"> </div>
CSS
* {
margin: 0;
pading: 0;
color: white;
}
.box{
width: 100px;
height: 50px;
background-color: #ccc;
margin: 5px;
font-size: 2em;
text-align: center;
line-height: 1.5em;
position:absolute;
}
#fieldPerimeter{
height: 100%;
background-color: blue;
}
JavaScript
(function () {
var i, lastBox,
MAX_DIVS = 72,
BOX_HEIGHT = 50,
BOX_WIDTH = 100,
BOX_MARGIN = 5,
field = document.getElementById('fieldPerimeter'),
fieldHeight = field.offsetHeight,
maxRows = Math.floor(fieldHeight / (BOX_HEIGHT + BOX_MARGIN)),
rowIndex = 0,
colIndex = 0,
lastLeftOffset = 0,
lastTopOffset = 0;
function moveBox(box, where) {
switch (where) {
case "north":
lastTopOffset -= BOX_HEIGHT + BOX_MARGIN;
box.style.top = lastTopOffset + 'px';
box.style.left = lastLeftOffset + 'px';
rowIndex -= 1;
break;
case "east":
lastLeftOffset += BOX_WIDTH + BOX_MARGIN;
box.style.top = lastTopOffset + 'px';
box.style.left = lastLeftOffset + 'px';
colIndex += 1;
break;
case "south":
lastTopOffset += BOX_HEIGHT + BOX_MARGIN;
box.style.top = lastTopOffset + 'px';
box.style.left = lastLeftOffset + 'px';
rowIndex += 1;
break;
default:
break;
}
}
for (i = 0; i < MAX_DIVS; i += 1) {
lastBox = document.createElement('div');
lastBox.className = 'box';
lastBox.innerHTML = i;
field.appendChild(lastBox);
//delete me
if( (i + 1) % 2 === 0 || (i + 1)% 3 === 0){
moveBox(lastBox, "east");
} else {
moveBox(lastBox, "south");
}
//delete me
// if(rowIndex < maxRows && rowIndex > 0){
// if (colIndex % 4 === 0){
// moveBox(lastBox, "south");
// } else if (colIndex % 2 === 0){
// moveBox(lastBox, "north");
// } else {
// moveBox(lastBox, "east");
// }
// }
}
})();