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Graphics clear() works only when I put debbuger and open developer tool


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I'm new to Phaser and that just got the problem with graphics object. What I want to do is display a bar of "energy" so that when I press the SPACEBAR keyboard the energy bar will be fulfilled until the key is released. In addition I want to tracking the previous charged energy so when the key was released I will fulfilled the energy bar with the graphic alpha is 0.5. Please look at below:


The tracking energy is clear that I don't know why, because I think I draw right after I clear all. This doesn't work until I try to put the debugger and open the developer tool (in Chrome). You can try yourself to see that.




var game = new Phaser.Game(800, 600, Phaser.AUTO, 'phaser-example', { create: create, update: update });
    var spaceButton;
    var currentEnergy = 0;
    var MAX_ENERGY = 500;
    var chargingEnergyGraphic;
    var previousChargingEnergyGraphic;
    function create() {
        chargingEnergyGraphic = game.add.graphics(0, 0);
        previousChargingEnergyGraphic = game.add.graphics(0, 0);
        var graphics = game.add.graphics(0, 0);
        graphics.lineStyle(2, 0xFF0000, 1);
        graphics.drawRect(50, 50, 500, 20);
        spaceButton = game.input.keyboard.addKey(Phaser.Keyboard.SPACEBAR);
    function update() {
        if (spaceButton.isDown && currentEnergy <= MAX_ENERGY) {
            currentEnergy += 10;
            chargingEnergyGraphic.lineStyle(2, 0xFF0000, 1);
            chargingEnergyGraphic.drawRect(50, 50, currentEnergy, 20);
        if (spaceButton.justReleased()) {
    function trackPreviousEnergy() {
        previousChargingEnergyGraphic.alpha = 0.5;
        previousChargingEnergyGraphic.drawRect(50, 50, currentEnergy, 20);
        currentEnergy = 0;
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I was using Phaser 2.1.3 that justReleased is available. If you run the code on Phaser 2.1.3 you will get the same problem. Fortunately I've just upgraded to Phaser 2.2.1 and the problem does not exist



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