My attempt to implement a custom filter with nunjucks, as per the documentation, resulted in an error message:
Error: filter not found: my_filter_hereHere are the configurations I have:
index.js
const express = require('express');
const nunjucks = require('nunjucks');
const port = 3000;
const app = express();
nunjucks.configure('views', {
autoescape: true,
express: app
})
app.set('view engine', 'html');
const env = new nunjucks.Environment();
env.addFilter('is_undefined', function(obj) {
return typeof obj === 'undefined';
});
For template rendering, I am using
res.render('register.html', {errors: errors});
In my template, I have set it up like this:
{% if errors|is_undefined %}
// do something
{% endif %}
The error I am facing is: Error: filter not found: is_undefined
Some suggestions on Stack Overflow mentioned using env.render() instead of res.render, but changing it caused my HTML page not to render. Any solutions to correct this issue?
Thank you in advance. :)