I can't get the chessboard in the correct colors-CodePudding

I'm trying to make a color black and then a color white, but some colors come together horizontally, and I didn't want it to stay that way. I want to create a board from a loop.

Could anyone help?

 var tab = document.querySelector('.grid-container')
    for (let i = 1; i <= 64; i  ) {
        if (i % 3 == 0) {
            tab.innerHTML  = '<div >' i '</div>'
        } else {
            tab.innerHTML  = '<div >' i '</div>'
        }        
    }

.grid-container {
    display: grid;
    grid-template-columns: repeat(8, 50px);
    grid-template-rows: repeat(8, 50px);
    background-color: #2196F3;
}

.grid-item {
    background-color: rgba(255, 255, 255, 0.8);
    border: 1px solid rgba(0, 0, 0, 0.8);
    font-size: 30px;
    text-align: center;
}

.black{
    background-color: black;
}

.white {
    background-color: white;
}

<html>

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <link rel="stylesheet" href="./css/style.css">
    <title>Document</title>
</head>

<body>
    <div >
  
</div>
    <script src="./board.js"></script>
</body>

</html>

CodePudding user response：

Use a second for loop to easily distinguish rows and cols.

Then we can use the following if to check for black/white squares:

if ((i   j) % 2) {
    tab.innerHTML  = '<div >' n '</div>'
} else {
    tab.innerHTML  = '<div >' n '</div>'
}

var tab = document.querySelector('.grid-container')

for (let i = 0; i < 8; i  ) {
    for (let j = 0; j < 8; j  ) {
        let n = 1   (i * 8   j);
        if ((i   j) % 2) {
            tab.innerHTML  = '<div >' n '</div>'
        } else {
            tab.innerHTML  = '<div >' n '</div>'
        }     
    }
}

.grid-container {
    display: grid;
    grid-template-columns: repeat(8, 50px);
    grid-template-rows: repeat(8, 50px);
    background-color: #2196F3;
}

.grid-item {
    background-color: rgba(255, 255, 255, 0.8);
    border: 1px solid rgba(0, 0, 0, 0.8);
    font-size: 30px;
    text-align: center;
}

.black{
    background-color: black;
}

.white {
    background-color: white;
}

<div ></div>