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HTML 

              
                <div class="main-grid actual-grid">

    <main class="about">
        <h1>Hello World</h1>
        <p>About Ipsum</p>
    </main>
    <aside class="news">
        <h4>Latest News</h4>
        <h3>News article goes here</h3>
        <p class="description">Lorem ipsum dolor sit amet, consectetur adipiscing elit. Etiam vitae eros a ex consequat interdum. Vestibulum velit felis, fermentum sit amet convallis eget, suscipit ut est. Curabitur aliquet ante sit amet nisl suscipit mollis. Quisque in sodales nulla, eu finibus felis. Nam venenatis blandit metus a dignissim. </p>
        <a href="#">Learn more</a>
    </aside>

        <aside class="photo">
        <img src="https://placekitten.com/1000/800" alt="" />
    </aside>
</div>






<div class="controls">
    <h3>Layout On the Grid (click) </h3>
    <button class="button gridButton" data-selectClass="about">About</button>
    <button class="button gridButton" data-selectClass="news">News</button>
    <button class="button gridButton" data-selectClass="photo">Photo</button>
<div class="main-grid">
  
      <div class="box about" data-row="1" data-column="1"></div>
      <div class="box news" data-row="1" data-column="2"></div>
      <div class="box photo" data-row="1" data-column="3"></div>
      <div class="box" data-row="1" data-column="4"></div>
      <div class="box" data-row="1" data-column="5"></div>
      <div class="box" data-row="1" data-column="6"></div>
      <div class="box" data-row="2" data-column="1"></div>
      <div class="box" data-row="2" data-column="2"></div>
      <div class="box" data-row="2" data-column="3"></div>
      <div class="box" data-row="2" data-column="4"></div>
      <div class="box" data-row="2" data-column="5"></div>
      <div class="box" data-row="2" data-column="6"></div>
      <div class="box" data-row="3" data-column="1"></div>
      <div class="box" data-row="3" data-column="2"></div>
      <div class="box" data-row="3" data-column="3"></div>
      <div class="box" data-row="3" data-column="4"></div>
      <div class="box" data-row="3" data-column="5"></div>
      <div class="box" data-row="3" data-column="6"></div>
      <div class="box" data-row="4" data-column="1"></div>
      <div class="box" data-row="4" data-column="2"></div>
      <div class="box" data-row="4" data-column="3"></div>
      <div class="box" data-row="4" data-column="4"></div>
      <div class="box" data-row="4" data-column="5"></div>
      <div class="box" data-row="4" data-column="6"></div>
      <div class="box" data-row="5" data-column="1"></div>
      <div class="box" data-row="5" data-column="2"></div>
      <div class="box" data-row="5" data-column="3"></div>
      <div class="box" data-row="5" data-column="4"></div>
      <div class="box" data-row="5" data-column="5"></div>
      <div class="box" data-row="5" data-column="6"></div>
      <div class="box" data-row="6" data-column="1"></div>
      <div class="box" data-row="6" data-column="2"></div>
      <div class="box" data-row="6" data-column="3"></div>
      <div class="box" data-row="6" data-column="4"></div>
      <div class="box" data-row="6" data-column="5"></div>
      <div class="box" data-row="6" data-column="6"></div>
  </div>
  
    <a class="button save">
    Save
    </a>
    <span class="close">(close)</span>
    
</div>
!

CSS 

              
                img {
    width: 100%;
    object-fit: cover;
    height: 100%;
}
body {
   
}
* {
    box-sizing: border-box;
}
.button {
    display: inline-block;
    background-color: purple;
    color: white;
    padding: 10px 15px;
    cursor: pointer;
    text-align: center;
    &.save {
        display: block;
    }
    &:hover {
        background-color: darken(purple, 10%);
       
    }
}
.actual-grid {
    background-color: tomato;
}
.controls .main-grid {
    height: 30vh;
    margin: 10px 0;
    grid-template-rows: repeat(6, 1fr);
    grid-gap: 2%;

}
.controls h3 {
    margin: 0 0 10px 0;
}
.main-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    grid-auto-rows: minmax(100px, 1fr);
    grid-gap: 1vw;
}
.box {
    background-color: tomato;
    &:hover {
        background-color: darken(tomato, 10%);
    }
    &.about {
        background-color: pink;
        &:hover {
            background-color: darken(pink, 10%);
        }
    }
    &.news {
        background-color: lightblue;
        &:hover {
            background-color: darken(lightblue, 10%);
        }
        
    }
    &.photo {
        background-color: goldenrod;
        &:hover {
            background-color: darken(goldenrod, 10%);
        }
    }
}




.controls {
    position: fixed;
    opacity: .5;
    right: 0;
    bottom: 0;
    background-color: #efefef;
    width: 30vw;
    padding: 20px;
    transition: .3s ease-out;
    transform: translatey(87%);
    .close {
        font-size: .7em;
    }
    &:hover {
        opacity: 1;
    }
    &.active {
        opacity: 1;
        transform: translatey(0);
    }
    .active {
        color: tomato;
    }
}
.about {
    background-color: pink;
    padding: 1vw;
}
.photo {
    background-color: goldenrod;
}
.news {
    background-color: lightblue;
    padding: 1vw;

}
!

JS 

              
                let selectClass = "";
const classes = ['about', 'news', 'photo'];
$('.gridButton').on('click', function(e) {
    e.preventDefault;
    $('.controls').find('.active').toggleClass('active');
    $(this).toggleClass('active');
    selectClass = $(this).data('selectclass');
    
})


$('.controls .main-grid').on('mousedown', function(e) {
    // e.preventDefault;
    $('.box').bind('mouseover', function() {
        $(this).toggleClass(selectClass);
    });
});
$(window).on('mouseup', function() {
    $('.box').unbind('mouseover');
})




$('.box').on('click', function(e) {
    e.preventDefault;
    $(this).toggleClass(selectClass);
})


$('.save').on('click', function(e) {
    e.preventDefault;  
    getGridPosition();
});


function findBoxes() {
    let boxes = [];
    $('.box').each(function(i, elem) {
        if (elem.classList.length > 1) {
            boxes.push(elem);
        }
    });
    return boxes
    
    
}

function splitBoxArray(array) {
    let subArray = [];
    $(classes).each(function(i, elem) {
       subArray[elem] = array.filter(function(item) {
           return $(item).hasClass(elem);
       });
    });
    
    return subArray;
    
}

function setGrid(className, boxes) {
    const rows = [];
    const columns = [];
    $(boxes).each(function(i, elem) {
            let row = $(elem).data("row");
            let col = $(elem).data("column");
            rows.push(row);
            columns.push(col);
    });
    if (rows.length > 0) {
        let firstCol = Math.min(...columns);
        let lastCol = Math.max(...columns) + 1;
        let firstRow = Math.min(...rows);
        let lastRow = Math.max(...rows) + 1;
        let gridArea = firstRow + " / " + firstCol + " / " + lastRow + " / " + lastCol;
        console.log(firstCol, lastCol, firstRow, lastRow);
        $('.actual-grid .' + className).css('grid-area', gridArea);
    }
}

function getGridPosition(item) {
    let boxArray = findBoxes();
    let splitArray = splitBoxArray(boxArray);

    setGrid("about", splitArray.about);
    setGrid("news", splitArray.news);
    setGrid("photo", splitArray.photo);
    
}

$('.controls h3').on('click', function(e) {
    $(this).parent().toggleClass('active');
});
$('.close').on('click', function(e) {
    $(this).parent().toggleClass('active');
})
!
999px

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