Why: the goal or problem

Templates and changing data must stay synchronized. Updating visible fields individually creates duplicate work and inconsistent screens.

How: work toward a solution

Two Field notes cards start unsaved. Save on A17 changes only its label to Saved; B04 stays unsaved. Saving B04 changes the shared count from one to two. Repeating Save leaves two records: each ID counts once. The diagram connects reactive state to the template. Reset or reload clears both cards. There is no persistent storage here.

Vue: concept simulation

Concept simulation

Vue

Save either card. Each ID counts once; the other card stays unchanged.

01 · Logic: reactive state

A17: 0 · B04: 0 → 1

02 · Template: state bindings

A17

Field notes

B04

Field notes

03 · Style: card presentation

One authoring file; packaging is separate.

Saved count: 0 / 2

A17: 0 · B04: 0

Waiting

A fictional demo within this article. Reset or reload restores its initial state.

What: the concept

Vue binds templates to reactive state. A single-file component can colocate logic, template, and styles; it is an authoring format, not a network-file guarantee.

Define shared ownership and external persistence separately.

Source