JavascriptSandbox/catchAllScreen/code.js

//Variables
var wSize, hSize;

//Fonctions de redimensionnement
function dimensionner(bloc) {
	
	if( typeof( window.innerHeight ) == 'number' )
		hSize = window.innerHeight;
	else if( document.documentElement && document.documentElement.clientHeight )
		hSize = document.documentElement.clientHeight;

	if( typeof( window.innerWidth ) == 'number' )
		wSize = window.innerWidth;
	else if( document.documentElement && document.documentElement.clientWidth )
		wSize = document.documentElement.clientHeight;

	//alert("Largeur : " + wSize + "   Hauteur : " + hSize);
	document.getElementById(bloc).height = hSize;
	document.getElementById(bloc).width = wSize;
}

window.onload = function(){ dimensionner("canvas") };
window.onresize = function(){ dimensionner("canvas") };

//Propriétés
var canvas  = document.querySelector('#canvas');
var context = canvas.getContext('2d');

//Main
context.lineWidth = "5";
function mainLoop() {
	//Affichage
	context.strokeStyle = "blue";
	context.strokeRect(1, 1, wSize-30, hSize-30);
}

//Loop
setInterval(mainLoop, 1000);