Dynamically resize columns in css grid with mouse

Question

I am trying to dynamically resize CSS grid layout margins by dragging column separators (or resizing placeholders) with the mouse.

I set resize: horizontal;the element navto resize, and it changes when I drag the small resize marker in the lower right corner of the element, but the width of the adjacent column is not automatically adjusted, which leads to overlap. Here is a broken code handle .

HTML:

<main>
 <nav>#1</nav>
 <header>#2</header>
 <section>#3</section>
</main>

CSS:

main {
    display: grid;
    border: 3px dotted red;
    grid-gap: 3px;
    grid-template-columns: 200px 1fr;
    grid-template-rows: 100px 1fr;
    height: 100%;
}

nav {
    grid-column: 1;
    grid-row: 1;
    grid-row: 1 / span 2;
    resize: horizontal;
    overflow: scroll;
    border: 3px dotted blue;
}

I expected the CSS grid mechanism to automatically handle this case, but obviously this is not the case.

I experimented with resizable jquery-ui, but it doesn't work very well with CSS grids.

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Answer 1

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body {
    margin: 10px;
    height: 100%;
}

main {
    display: grid;
    border: 3px dotted red;
    padding: 3px;
    grid-gap: 3px;
    
    grid-template: 
    "nav head" min-content
    "nav main" 1fr
        / min-content 1fr;
}

nav {
    grid-area: nav;
    border: 3px dotted blue;
    overflow: auto;
    resize: horizontal;
    
    min-width: 120px;
    max-width: 50vw;
}

header {
    grid-area: head;
    border: 3px dotted orange;
    overflow: auto;
    resize: vertical;
    
    min-height: min-content;
    max-height: 200px;
}

section {
    grid-area: main;
    border: 3px dotted gray;
}

<main>
  <nav>
    <ul>
      <li>Nav Item</li>
      <li>Nav Item</li>
      <li>Nav Item</li>
      <li>Nav Item</li>
      <li>Nav Item</li>
      <li>Nav Item</li>
    </ul>
  </nav>

  <header>
    <h1>Header Title</h1>
    <small>Header Subtitle</small>
  </header>

  <section>
    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.</p>
  </section>
</main>

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Answer 2

, (grid-template-columns: 200px 1fr;), , grid-template-columns: 0.2fr 1fr; - CSS . div , / 100% jqueryui resizable.

jsfiddle.

/* Javscript */

$('.left_inner').resizable();
$('.right_top_inner').resizable();
$('.right_bottom_inner').resizable();

/* CSS */

	.grid {
		display: grid;
		grid-template-columns: 0.2fr 1fr;
		grid-template-rows: 1fr 4fr;
        grid-gap: 3px;
		position: relative;
	}

	.left {
		grid-row: 1 / span 2;
	}

	.right_top {
		grid-column: 2;
		grid-row: 1;
	}

	.right_bottom {
		grid-column: 2;
		grid-row: 2;
	}

	.left_inner {
		background-color: #fedcd2;
		padding: 0;
		width: 100%;
		min-width: 100%;
		height: 100%;
		min-height: 100%;
		text-align: center;
	}

	.right_top_inner {
		background-color: #f9cf00;
		padding: 0;
		width: 100%;
		min-width: 100%;
		height: 100%;
		min-height: 100%;
		text-align: center;
	}

	.right_bottom_inner {
		background-color: #f8eee7;
		padding: 0;
		width: 100%;
		min-width: 100%;
		height: 100%;
		min-height: 100%;
		text-align: center;
	}

<!-- HTML -->

<script src="//code.jquery.com/jquery-2.1.3.min.js"></script>
<link rel="stylesheet" href="//cdnjs.cloudflare.com/ajax/libs/jqueryui/1.10.0/css/smoothness/jquery-ui-1.10.0.custom.min.css" />
<script src="//cdnjs.cloudflare.com/ajax/libs/jqueryui/1.10.0/jquery-ui.js"></script>

	<main class="grid">
	 <aside class='left'>
	  <div class="left_inner">
		drag the bottom right handle to resize
	  </div>
	 </aside>
	 <section class="right_top">
	  <div class="right_top_inner">right_top_inner</div>
	 </section>
	 <section class="right_bottom">
	  <div class="right_bottom_inner">right_bottom_inner</div>
	 </section>
	</main>

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