dynamic rendering in express using loop won't work

I have bunch of static file, they are named article1, article2 and so on. So I know it worked when I do

app.get('/this-is-my-article-routes', (req, res) => {
        res.render('article1');
});

but it's too tedious and has lots of repeated code. I tried this but it doesn't work?

const articleArr = [
    'this-is-my-article-routes'
];

for (i = 0; i<9; i++) {
    app.get(`/${articleArr[i]}`, (req, res) => {
        res.render(`article${i}`);
    });
}

Is this even possible? or there's something wrong with my codes?

via Jenny Mok