Template engines are tools that help us separate the application logic from the presentation layer. They usually combine multiple templates with a data model, thus improving the maintenance and flexibility of our web applications.
There are a lot of template engines that we can install with NPM and use in Express and perhaps in the browser too. They can be split into the following categories:
Logic-less template engines: Their goals are to have no explicit control-flow statements and to make it impossible to embed application logic
Template engines with logic: These engines allow us to use JavaScript or DSL code and evaluate it within the templates
Programmatic template engines: These are engines that build HTML from scratch or augment it using data
Next, we are going to talk about each category and see what solutions are available for them in the NPM registry.