Drawing a grid using CSS

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 7  2028

I\'m looking for a way to draw a grid (i.e. http://www.artlex.com/ArtLex/g/images/grid.gif) inside of a div, using CSS (and JS if necessary). It feels like it should be relative

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小蘑菇

2021-02-07 01:00

Here is a solution that is an edited version of @YiJiang's answer to reduce it to O(n) complexity. The only reason I added my solution was that it is complete with css and jsfiddle sample (http://jsfiddle.net/madstop/bM5Kr/)

css:

.gridlines { display: none; position:absolute; background-color:#ccc; }

javascript/jquery:

function createGrid(size) {
var i, 
    height = $(window).height(),
    width = $(window).width(),
    ratioW = Math.floor(width/size),    
    ratioH = Math.floor(height/size); 

for (i=0; i<= ratioW; i++)  // vertical grid lines
    $('<div />').css({
            'top': 1, 
            'left': i * size, 
            'width': 1, 
            'height': height })
        .addClass('gridlines')
        .appendTo('body');

    for (i=0; i<= ratioH; i++) // horizontal grid lines
        $('<div />').css({
            'top': 1 + i * size, 
            'left': 0, 
            'width': width, 
            'height': 1 })
        .addClass('gridlines')
        .appendTo('body');

    $('.gridlines').show();
}

createGrid(50);

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有刺的猬

2021-02-07 01:01

This is how i'd do it:

1) Make image of an L where each side of the L is the equal to one of your squares in the grid.

2) set this as bg image of your div, repeat on x and y axis

3) give your div a 1px black border on the top and right

4) you have the desired effect!

hope that helps

Edit after seeing your no images comment:

why not just use a table to make the grid (as you wont be able to do what you want without images) and overlay the table with an absolutely positioned content div?

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时光取名叫无心

2021-02-07 01:01

Three years later... @user3061127, I love you!

The other answers are great, but just using some very simple HTML and CSS yields exactly what I want. A wonderful, beautiful grid. I'd have posted a simple comment with a link to the fiddle, but I'm not cool enough yet, hence my answer instead.

Here's my take based on your original, which gives the two-layered grid look you see on professional graph paper (yes, all this is because I am too stubborn to go out and just buy some!)

If you have different sized paper, all you have to do is change the height and width of #main and you're good to go. If you want a different sized grid, all you have to do is change the background-size attributes and the dimensions in the background-image. Note that the repeating background image is finicky. The dimensions have to match up to the background-size or you'll get no repeating lines at all.

<!DOCTYPE html>
<html>
    <head>
        <style>
            html, body {
                margin: 0;
            }
            #main {
                height: 11in; /* Double this and print at 50% */
                position: relative;
                width: 8.5in; /* Double this and print at 50% */
            }
            .grid {
                background-image: repeating-linear-gradient(0deg,transparent,transparent 69px,#88F 69px,#88F 70px),
                                repeating-linear-gradient(-90deg,transparent,transparent 69px,#88F 69px,#88F 70px);
                background-size: 70px 70px;
                height: 100%;
                position: absolute;
                width: 100%;
            }
            .smallgrid {
                background-image: repeating-linear-gradient(0deg,transparent,transparent 13px,#CCF 13px,#CCF 14px),
                                repeating-linear-gradient(-90deg,transparent,transparent 13px,#CCF 13px,#CCF 14px);
                background-size: 14px 14px;
                height: 100%;
                position: absolute;
                width: 100%;
            }
        </style>
    </head>
    <body>
        <div id="main">
            <div class="smallgrid"></div>
            <div class="grid"></div>
        </div>
    </body>
</html>

The fiddle: http://jsfiddle.net/ykotfuaw/5/

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滥情空心

2021-02-07 01:03

"Pure CSS" and exactly 100px² grid.

(A variation of the top-voted answer, above.)

body { box-sizing:border-box; margin:0; height:100%; width:100%; background-size:100px 100px;
       background-image: repeating-linear-gradient(0deg, transparent, transparent 99px, #ccc 99px, #ccc 100px), 
       repeating-linear-gradient(-90deg, transparent, transparent 99px, #ccc 99px, #ccc 100px); 
     }

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清酒与你

2021-02-07 01:04
I know this question has already been answered, but I've done considerable work on this exact problem for a project I was working on, so I thought I would share my findings. Rendering speed was a massive issue for me, and like @YiJiang, I started by appending nodes from inside the loop, but I found that this was not a very performant solution, so I looked into ways to optimise the algorithm.

Algorithmically speaking, nesting loops causes O(n^2) complexity, which in this case can be avoided by generating the row html once (as it is the same for each row), and then concatenating this string into each row. This results in O(n) complexity, and is by far the most efficient solution I've found.
```
function drawGrid(width, height) {
    var grid = '<div id="grid">',
        cell_html = '',
        i = 0, j = 0;

    for( ; i < width; i++) {
        cell_html += '<div class="cell"></div>';
    }

    for( ; j < height; j++) {
        grid += '<div class="row">' + cell_html + '</div>';
    }

    grid += '</div>';

    return grid;
}
```
This creates the basic HTML structure for the grid, which can then be styled appropriately using CSS.
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佛祖请我去吃肉

2021-02-07 01:19

Here's a simple solution using jQuery. This script will try to fill in as many grid element as possible without overflowing. The function accepts a single parameter, which defines the size of the grid.

function createGrid(size) {
    var ratioW = Math.floor($(window).width()/size),
        ratioH = Math.floor($(window).height()/size);

    var parent = $('<div />', {
        class: 'grid',
        width: ratioW  * size,
        height: ratioH  * size
    }).addClass('grid').appendTo('body');

    for (var i = 0; i < ratioH; i++) {
        for(var p = 0; p < ratioW; p++){
            $('<div />', {
                width: size - 1,
                height: size - 1
            }).appendTo(parent);
        }
    }
}

It also requires a simple CSS style:

.grid {
    border: 1px solid #ccc;
    border-width: 1px 0 0 1px;
}

.grid div {
    border: 1px solid #ccc;
    border-width: 0 1px 1px 0;
    float: left;
}

See a simple demo here: http://jsfiddle.net/yijiang/nsYyc/1/

Here's one using native DOM functions. I should also change the initial ratio calculation to use DOM functions ~~but I cannot for the life of me get window.innerWidth to return accurate numbers~~ fixed that:

function createGrid(size) {
    var ratioW = Math.floor((window.innerWidth || document.documentElement.offsetWidth) / size),
        ratioH = Math.floor((window.innerHeight || document.documentElement.offsetHeight) / size);

    var parent = document.createElement('div');
    parent.className = 'grid';
    parent.style.width = (ratioW * size) + 'px';
    parent.style.height = (ratioH * size) + 'px';

    for (var i = 0; i < ratioH; i++) {
        for (var p = 0; p < ratioW; p++) {
            var cell = document.createElement('div');
            cell.style.height = (size - 1) + 'px';
            cell.style.width = (size - 1) + 'px';
            parent.appendChild(cell);
        }
    }

    document.body.appendChild(parent);
}

createGrid(10);

It's basically a direct translation of the jQuery code. If you need even more performance you can switch to generating the boxes using strings pushed to an array:

arr.push('<div style="width:', (size - 1), 'px;height:', (size - 1), 'px;"></div>');

then at the end

parent.innerHTML = arr.join('');

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Drawing a grid using CSS

"Pure CSS" and exactly 100px2 grid.

"Pure CSS" and exactly 100px² grid.