CODEWITHSUNDEEP
node.jsexpressmiddleware
TechplexEngineer
TechplexEngineer

Reputation: 1928

Node.js - Expressjs middleware to extend res.render

I'd like to know if there is a built in way to extend Express.js's res.render function because, I'd like to pass a default set of "locals" to every template that is rendered. Currently I've written a small middleware that uses underscore.js's extend function to merge the default "locals" and the ones specific for that template:

app.use(function(req, res, next){
    res.render2 = function (view, locals, fn) {
        res.render(view, _.extend(settings.template_defaults, locals), fn);
    };
    next();
});

Is there a better way to do this?

Upvotes: 8

Views: 3349

Answers (2)

Jonathan Lonowski
Jonathan Lonowski

Reputation: 123453

app.locals is likely what you're looking for:

app.locals(settings.template_defaults);

Along with res.locals and res.render, Express is already capable of merging the values for you:

// locals for all views in the application
app.locals(settings.template_defaults);

// middleware for common locals with request-specific values
app.use(function (req, res, next) {
    res.locals({
        // e.g. session: req.session
    });
    next();
});

// and locals specific to the route
app.get('...', function (req, res) {
    res.render('...', {
        // ...
    });
});

Upvotes: 7

chovy
chovy

Reputation: 75666

res.locals or app.locals is for this exact purpose.

Upvotes: 3

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