Javascript功能仅适用于画布游戏

Question

I'm creating a canvas game (the concept is a side scrolling endless games). I'm trying to make power-ups so I have a main game JS file along with a powerup.js among others. At the moment I'm concentrating on my invincibility power up. I've created some simple code which in theory should work:

In the powerup.js

function powerUpInvincibility() {
    invincible = true;
    //window.setInterval(powerUpInvincibilityReset, this.powerUpTime[0]);
}

function powerUpInvincibilityReset() {
    jet1.invincible = false;
}

I set the invincible variable in the main js but they are all linked, I've got code in all the JS files working but even when I call the powerUpInvincibility function in Chrome's Console the variable doesn't change.

I've tried making it a variable for the jet and the powerup but that doesn't work either and I've checked for any spelling mistakes several times.

I'm lost, any suggestions?

Answer 1

Ok sorry everyone! The actual problem was that one of my powerUp functions tried to access a this variable when it wasn't a powerUp.prototype function. Thanks for the answers!