In this HackerRank Day 8: Buttons Container 10 Days of javascript problem We want to create nine buttons enclosed in a div, laid out so they form a grid. Each button has a distinct label from to , and the labels on the outer buttons must rotate in the clockwise direction each time we click the middle button.
HackerRank Day 8: Buttons Container 10 Days of javascript problem solution.
HTML File
<body>
<script src=”js/buttonsGrid.js” type=”text/javascript”></script>
<link rel=”stylesheet” href=”css/buttonsGrid.css” type=”text/css”>
<div id=”btns” class=”btnContainer”>
<button id=”btn1″ class=”btnStyle”>1</button>
<button id=”btn2″ class=”btnStyle”>2</button>
<button id=”btn3″ class=”btnStyle”>3</button>
<button id=”btn4″ class=”btnStyle”>4</button>
<button id=”btn5″ class=”btnStyle” onClick=”rotate()”>5</button>
<button id=”btn6″ class=”btnStyle”>6</button>
<button id=”btn7″ class=”btnStyle”>7</button>
<button id=”btn8″ class=”btnStyle”>8</button>
<button id=”btn9″ class=”btnStyle”>9</button>
</div>
</body>
CSS File
.btnContainer {
width: 75%;
}
.btnContainer > .btnStyle {
width: 30%;
height: 48px;
font-size: 24px;
}
JavaScript File
var l = “4”;
var a = [“1”, “2”, “3”, “6”, “9”, “8”, “7”, “4”];
var b = [“1”, “2”, “3”, “6”, “9”, “8”, “7”, “4”];
var rotate = function() {
for (var i = 7; i > 0; i–) {
a[i] = a[i – 1];
}
a[0] = l;
l = a[7];
for (var i = 0; i < 8; i++) {
document.getElementById(“btn” + b[i]).innerText = a[i];
}
}
explain the js for me please