@infinityfx/lively
Version:
Feature complete, lightweight react animation library.
3 lines (2 loc) • 594 B
JavaScript
const e=new Set;function n(s,c){let t={value:s,cached:s,subscriptions:new Set};const r=function(e){return e instanceof Function?n(t.value,(n=>e(r(),n))):c?c(e||0):t.value};return r.set=(n,s)=>{t.value=n,e.forEach((n=>{if(!n.key.deref())return e.delete(n);n.observe(s||{})}))},r.subscribe=e=>t.subscriptions.add(e),r.unsubscribe=e=>t.subscriptions.delete(e),e.add({key:new WeakRef(r),observe:function(e){const n=r();n!==t.cached&&(t.cached=n,t.subscriptions.forEach((n=>n(e))))}}),r}function s(e){return void 0!==e.subscribe}export{n as createLink,s as isLink};
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