javascript - Chrome网络应用程序: Cannot execute function in game loop

Question

我是 Chrome Web Apps 的初学者，正在尝试将 Bump'n'Jump 的 JavaScript/HTML5 克隆打包为打包应用程序。我在 Chrome 的安全政策方面遇到了困难:

function pump() {
    while (1) {

        game_loop();
        var now = timeGetTime();
        var time_diff = next_time - now;
        next_time += (1000 / 60);

        if (time_diff>0) {
            // we have time left
            setTimeout("pump()", time_diff);
            break;
        }
        // debug("frametime exceeded: " + (-time_diff));
    }
}

它拒绝运行setTimeout("pump()", time_diff);，说

Refused to evaluate script because it violates the following Content Security Policy      directive: "default-src 'self' chrome-extension-resource:". Note that 'script-src' was not explicitly set, so 'default-src' is used as a fallback.

错误不在于代码，因为它在 Chrome 之外的浏览器中运行，Chrome 的安全性似乎不喜欢它。谁能告诉我为什么它不想运行 pump()？

Answer 1

不知道这是否有帮助，但请尝试以下操作:替换 setTimeout 字符串参数:

function pump() {
    while (1) {

        game_loop();
        var now = timeGetTime();
        var time_diff = next_time - now;
        next_time += (1000 / 60);

        if (time_diff>0) {
            // we have time left
            setTimeout(pump, time_diff);
            break;
        }
        // debug("frametime exceeded: " + (-time_diff));
    }
}

在 setTimeout 或 setInterval 中使用字符串作为执行参数相当于 eval，被认为是不好的做法。