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JavaScript

Posted by Henrik Christensen
.a{fill-rule:evenodd;}techdegree
Henrik Christensen
Python Web Development Techdegree Student 38,322 Points

Express.js / Jade / Pug

Hi,

I'm going through the express.js course and been learning about Jade (pug) but I'm kinda confused cause with my index.pug template I used pug.renderFile() to get the app working, but with the post.pug I had to use pug.compileFile() even though I had to use the response.send() in both cases to make it work - any ideas why?

app.get("/", function(request, response) {
    var indexPage = pug.renderFile(__dirname + "/templates/index.pug");
    response.send(indexPage);
});

app.get("/blog/:title?", function(request, response) {
    var title = request.params.title;
    if (title === undefined) {
        response.status(503);
        response.send("This page is under construction!");
    } else {
        var blogPage = pug.compileFile(__dirname + "/templates/post.pug");
        var post = posts[title];
        response.send(blogPage({ post: post }));
    }
});

1 Answer

Seth Kroger
Seth Kroger
56,416 Points

https://pugjs.org/api/reference.html

compileFile() says it "Compile a Pug template from a file to a function which can be rendered multiple times with different locals." [emphasis mine] So compileFile will prep it so it's half-way rendered but won't substitute the values for placeholders just yet.

        var blogPage = pug.compileFile(__dirname + "/templates/post.pug");
        var post = posts[title];
        response.send(blogPage({ post: post }));

// should be the same as:

        var post = posts[title];
        var blogPage = pug.renderFile(__dirname + "/templates/post.pug", { post: post });
        response.send(blogPage);

// but you should be able to set the view engine then call response.render() directly and 
// let express handle calling pug
app.set('view engine', 'pug');
app.set('views', __dirname + '/templates');

// ...
        var post = posts[title];
        response.render('post', { post: post });
Henrik Christensen
.a{fill-rule:evenodd;}techdegree
Henrik Christensen
Python Web Development Techdegree Student 38,322 Points

This makes sence, thank you very much :-)