How to switch ngx-markdown theme dynamically?

Question

I have an Angular app that can switch between light and dark theme.

I use ngx-markdown and display code blocks with prism.js for language highlighting.

I imported 2 themes in package.json

"styles": [
    [...],
    "node_modules/prismjs/themes/prism-vs.css",
    "node_modules/prismjs/themes/prism-vsc-dark-plus.css"
],

How can I change Prism.js theme dynamically with Typescript ?