From the article: > It marks a piece of code to be treated as data (to be sent to the client). > This means that whoever imports onClick from the backend code

From the article: > It marks a piece of code to be treated as data (to be sent to the client). > This means that whoever imports onClick from the backend code won’t get an actual onClick function—instead, they’ll get '/js/chunk123.js#onClick' or something like that identifying how to load this module. It gives you code-as-data. Eventually this code will make it to the client (as a <script>) and be evaluated there. The point of quoting in Lisp is that you get the code actually as data: You can introspect it ("how many string literals are there in here"), rewrite it ("unroll every loop once"), serialize it, store it in a database. And more importantly: The code is structured in the same way as any data in a regular program (lists). It's not hard for the developer to do any of these things. If I get back '/js/chunk123.js#onClick' I simply have a reference, which I can use to invoke it remotely. The code appears to still be sent as bundled JavaScript, evaluated as usual, and then linked together with the reference. There's a small connection to code-as-data in the sense that you need to be able serialize code in order to share it between a server/client, but other than that I don't really see much of a connection.