Draw rectangles dynamically in SVG

Question

I would like to know how to draw 100 rectangles with SVG.

I made one rectangle with this code:

Answer 1

You can fill the screen with the following loop:

var svgns = "http://www.w3.org/2000/svg";
for (var x = 0; x < 5000; x += 50) {
    for (var y = 0; y < 3000; y += 50) {
        var rect = document.createElementNS(svgns, 'rect');
        rect.setAttributeNS(null, 'x', x);
        rect.setAttributeNS(null, 'y', y);
        rect.setAttributeNS(null, 'height', '50');
        rect.setAttributeNS(null, 'width', '50');
        rect.setAttributeNS(null, 'fill', '#'+Math.round(0xffffff * Math.random()).toString(16));
        document.getElementById('svgOne').appendChild(rect);
    }
}

If you just want 100 randomly placed squares, you could do:

for (var i = 0; i < 100; i++) {
    var x = Math.random() * 5000,
        y = Math.random() * 3000;

    var rect = document.createElementNS(svgns, 'rect');
    rect.setAttributeNS(null, 'x', x);
    rect.setAttributeNS(null, 'y', y);
    rect.setAttributeNS(null, 'height', '50');
    rect.setAttributeNS(null, 'width', '50');
    rect.setAttributeNS(null, 'fill', '#'+Math.round(0xffffff * Math.random()).toString(16));
    document.getElementById('svgOne').appendChild(rect);
}

jsfiddle for the second one