In Svelte you can define a reactive statement (or block) with the $ label syntax. It's semantically the same of a MobX's computed value, expressed succinctly `$

In Svelte you can define a reactive statement (or block) with the $ label syntax. It's semantically the same of a MobX's computed value, expressed succinctly `$: v = expr` where expr will be rerun when and only if its dependencies change.