您可以定义类似window.parentPage = true;的变量 在index.html文件中.

You can define a variable like window.parentPage = true; in the index.html file.

在products.html页面中进行如下检查:

In the products.html page make a check like so:

if(!window.parentPage)
{
    window.location.href = "YOUR REDIRECTION PAGE"
}