igorvolnyi/index.html

## index.html
<!DOCTYPE html>
<html lang="ru">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <link rel="stylesheet" href="style.css">
    <title>Drag-n-drop на чистом JS</title>
</head>
<body>
    <div class="hero">
        <div class="wrapper">
            <div class="video-link">
                <a href="https://www.youtube.com/watch?v=-9qu_Z0D84g">Youtube: Простой Drag and Drop на чистом Javascript</a>
            </div>
            <ul class="list">
                <li class="list__caption">Planned</li>
                <li class="list__caption">In dev</li>
                <li class="list__caption">QA</li>
                <li class="list__caption">Production</li>
                <li class="list__cell js-cell">
                    <div class="list__card js-card" draggable="true">
                        <div class="list__card-header">
                            task title
                        </div>
                        <div class="list__card-info">
                            Task description
                        </div>
                    </div>
                </li>
                <li class="list__cell js-cell">

                </li>
                <li class="list__cell js-cell">

                </li>
                <li class="list__cell js-cell">

                </li>
            </ul>
        </div>
    </div>

    <script src="script.js"></script>
</body>
</html>

## script.js
const dragAndDrop = () => {
    const card = document.querySelector('.js-card');
    const cells = document.querySelectorAll('.js-cell');

    const dragStart = function () {
        setTimeout(() => {
            this.classList.add('hide');
        }, 0);
    };

    const dragEnd = function () {
        this.classList.remove('hide');
    };

    const dragOver = function (evt) {
        evt.preventDefault();
    };

    const dragEnter = function (evt) {
        evt.preventDefault();
        this.classList.add('hovered');
    };

    const dragLeave = function () {
        this.classList.remove('hovered');
    };

    const dragDrop = function () {
        this.append(card);
        this.classList.remove('hovered');
    };

    cells.forEach(cell => {
        cell.addEventListener('dragover', dragOver);
        cell.addEventListener('dragenter', dragEnter);
        cell.addEventListener('dragleave', dragLeave);
        cell.addEventListener('drop', dragDrop);
    });


    card.addEventListener('dragstart', dragStart);
    card.addEventListener('dragend', dragEnd);
};

dragAndDrop();

## style.css
/* Reset paddings and margins */
*, *::before, *::after {
    box-sizing: border-box;
    padding: 0;
    margin: 0;
}

body {
    font-family: Arial, sans-serif;
    font-size: 16px;
    line-height: normal;
    font-weight: 400;
}

.hero {
    width: 100%;
    min-height: 100vh;
}

.wrapper {
    max-width: 1024px;
    margin: 0 auto;
}

.video-link {
    text-align: center;
    padding-top: 40px;
}

.video-link a {
    text-decoration: none;
}

.list {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    margin: 50px 0;
}

.list__cell {
    flex-basis: calc(25% - 40px);
    min-height: 150px;
    margin: 20px;
    list-style: none;
    box-shadow: 0px 0px 7px 5px rgba(0,0,0,0.2);
    overflow: hidden;
    background-color:#f0f2f5;;
}

.list__caption {
    width: calc(25% - 40px);
    margin: 0 20px;
    list-style: none;
    font-weight: bold;
    color: #0747a6;
}

.list__card {
    display: flex;
    flex-wrap: wrap;
    flex-direction: column;
    text-align: center;
    min-height: 100%;
    cursor: all-scroll;
}

.list__card-header {
    text-transform: lowercase;
    font-weight: bold;
    padding: 12px 20px;
    background-color: #0747a6;
    color: white;
}

.list__card-info {
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: #eff5ff;
    flex-grow: 1;
    padding: 12px 20px;
    font-size: 14px;
    text-transform: uppercase;
    font-weight: 600;
}

.hovered {
    background-color: #d1d8e2;
}

.hide {
    display: none;
}
	<!DOCTYPE html>
	<html lang="ru">
	<head>
	<meta charset="UTF-8">
	<meta name="viewport" content="width=device-width, initial-scale=1.0">
	<meta http-equiv="X-UA-Compatible" content="ie=edge">
	<link rel="stylesheet" href="style.css">
	<title>Drag-n-drop на чистом JS</title>
	</head>
	<body>
	<div class="hero">
	<div class="wrapper">
	<div class="video-link">
	<a href="https://www.youtube.com/watch?v=-9qu_Z0D84g">Youtube: Простой Drag and Drop на чистом Javascript</a>
	</div>
	<ul class="list">
	<li class="list__caption">Planned</li>
	<li class="list__caption">In dev</li>
	<li class="list__caption">QA</li>
	<li class="list__caption">Production</li>
	<li class="list__cell js-cell">
	<div class="list__card js-card" draggable="true">
	<div class="list__card-header">
	task title
	</div>
	<div class="list__card-info">
	Task description
	</div>
	</div>
	</li>
	<li class="list__cell js-cell">

	</li>
	<li class="list__cell js-cell">

	</li>
	<li class="list__cell js-cell">

	</li>
	</ul>
	</div>
	</div>

	<script src="script.js"></script>
	</body>
	</html>
	const dragAndDrop = () => {
	const card = document.querySelector('.js-card');
	const cells = document.querySelectorAll('.js-cell');

	const dragStart = function () {
	setTimeout(() => {
	this.classList.add('hide');
	}, 0);
	};

	const dragEnd = function () {
	this.classList.remove('hide');
	};

	const dragOver = function (evt) {
	evt.preventDefault();
	};

	const dragEnter = function (evt) {
	evt.preventDefault();
	this.classList.add('hovered');
	};

	const dragLeave = function () {
	this.classList.remove('hovered');
	};

	const dragDrop = function () {
	this.append(card);
	this.classList.remove('hovered');
	};

	cells.forEach(cell => {
	cell.addEventListener('dragover', dragOver);
	cell.addEventListener('dragenter', dragEnter);
	cell.addEventListener('dragleave', dragLeave);
	cell.addEventListener('drop', dragDrop);
	});


	card.addEventListener('dragstart', dragStart);
	card.addEventListener('dragend', dragEnd);
	};

	dragAndDrop();
	/* Reset paddings and margins */
	, ::before, *::after {
	box-sizing: border-box;
	padding: 0;
	margin: 0;
	}

	body {
	font-family: Arial, sans-serif;
	font-size: 16px;
	line-height: normal;
	font-weight: 400;
	}

	.hero {
	width: 100%;
	min-height: 100vh;
	}

	.wrapper {
	max-width: 1024px;
	margin: 0 auto;
	}

	.video-link {
	text-align: center;
	padding-top: 40px;
	}

	.video-link a {
	text-decoration: none;
	}

	.list {
	display: flex;
	flex-wrap: wrap;
	justify-content: space-between;
	margin: 50px 0;
	}

	.list__cell {
	flex-basis: calc(25% - 40px);
	min-height: 150px;
	margin: 20px;
	list-style: none;
	box-shadow: 0px 0px 7px 5px rgba(0,0,0,0.2);
	overflow: hidden;
	background-color:#f0f2f5;;
	}

	.list__caption {
	width: calc(25% - 40px);
	margin: 0 20px;
	list-style: none;
	font-weight: bold;
	color: #0747a6;
	}

	.list__card {
	display: flex;
	flex-wrap: wrap;
	flex-direction: column;
	text-align: center;
	min-height: 100%;
	cursor: all-scroll;
	}

	.list__card-header {
	text-transform: lowercase;
	font-weight: bold;
	padding: 12px 20px;
	background-color: #0747a6;
	color: white;
	}

	.list__card-info {
	display: flex;
	align-items: center;
	justify-content: center;
	background-color: #eff5ff;
	flex-grow: 1;
	padding: 12px 20px;
	font-size: 14px;
	text-transform: uppercase;
	font-weight: 600;
	}

	.hovered {
	background-color: #d1d8e2;
	}

	.hide {
	display: none;
	}