FrontendEmergingAround since 2022
Signals
Also written as Fine-Grained Reactivity
A reactivity model where the framework tracks exactly which values a piece of UI depends on, so only the affected part re-renders — used by Solid, Svelte 5, Angular and Vue.
Think of it like
A spreadsheet recalculating only the cells that reference the number you changed, rather than the whole sheet.
Junior or senior?
Indicates someone tracking where frontend frameworks are converging.
Senior sounds like
Can contrast it with React's re-render model and say what problem it solves.
Ask them
“How do signals differ from React's re-render approach, and when does that difference matter?”