为什么我的catch块没有执行？

try {
    // 没有抛出异常的代码
    console.log("No exception thrown");
} catch (e) {
    console.log("This will not be executed");
}

try {
    throw new TypeError("Type error");
} catch (e) {
    if (e instanceof TypeError) {
        console.log("TypeError caught");
    } else {
        throw e; // 重新抛出异常
    }
} catch (e) {
    console.log("This will not be executed");
}

try {
    try {
        throw new Error("Inner error");
    } catch (e) {
        console.log("Inner catch block executed");
    }
} catch (e) {
    console.log("This will not be executed");
}

window.onerror = function(message, source, lineno, colno, error) {
    console.log("Global error handler caught:", message);
    return true; // 阻止默认错误处理
};

try {
    throw new Error("Uncaught error");
} catch (e) {
    console.log("This will not be executed");
}

try {
    // 可能抛出异常的代码
    throw new Error("Explicit error");
} catch (e) {
    console.log("Catch block executed:", e.message);
}