Frontend & browser·Modules, bundling and the build
you imported one helper and the build pulled in a date library you have never used directly.
Module graph
Also calleddependency graph, import graph
The directed graph of every module reachable from the entry points, which is the exact set the bundler must account for. Bundle size is a property of this graph rather than of your own code, so one transitive import can dominate the output. Reading it is the first step of every size investigation, which is what a bundle analyser is for.