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To create the stars themselves, we’ll create a simple loop that draws 1 pixel × 1 pixel squares randomly within the limits of the canvas:įor (var i = 0 i responsive, add a percentage width in CSS: Var canvas = document.getElementById("starfield"), To start, we’ll identify the canvas, tell JavaScript what context we are drawing in, and determine the total number of stars: Unlike almost every other element, should be sized using attributes, rather than CSS sizing the elements with styles alone causes scaling issues, as the element has its own default size that is distorted by using CSS width and height as its only dimension information. Let’s say we have a 750 × 500 pixel element with an id: This is in contrast to the approach of many of my students, who often seek a single, “perfect” solution rather than taking the time to build from something simple (but well-structured) into a more complex, nuanced production.
STARS BACKGROUND CODE
Unlike most other articles on The New Code, the goal of this piece is not to show a complete example, but to improve the code in incremental steps. A good example is a starfield background a very simple one can be built based by merely deciding if a canvas random pixel is white or not. Because it works on a pixel-by-pixel basis, canvas is perfectly suited to making extremely detailed images algorithmically.
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