Commit updated Javascript packages

build/javascript/node_modules/preact/src/create-context.js

@@ -0,0 +1,66 @@
+import { enqueueRender } from './component';
+
+export let i = 0;
+
+export function createContext(defaultValue, contextId) {
+	contextId = '__cC' + i++;
+
+	const context = {
+		_id: contextId,
+		_defaultValue: defaultValue,
+		Consumer(props, contextValue) {
+			// return props.children(
+			// 	context[contextId] ? context[contextId].props.value : defaultValue
+			// );
+			return props.children(contextValue);
+		},
+		Provider(props, subs, ctx) {
+			if (!this.getChildContext) {
+				subs = [];
+				ctx = {};
+				ctx[contextId] = this;
+
+				this.getChildContext = () => ctx;
+
+				this.shouldComponentUpdate = function(_props) {
+					if (this.props.value !== _props.value) {
+						// I think the forced value propagation here was only needed when `options.debounceRendering` was being bypassed:
+						// https://github.com/preactjs/preact/commit/4d339fb803bea09e9f198abf38ca1bf8ea4b7771#diff-54682ce380935a717e41b8bfc54737f6R358
+						// In those cases though, even with the value corrected, we're double-rendering all nodes.
+						// It might be better to just tell folks not to use force-sync mode.
+						// Currently, using `useContext()` in a class component will overwrite its `this.context` value.
+						// subs.some(c => {
+						// 	c.context = _props.value;
+						// 	enqueueRender(c);
+						// });
+
+						// subs.some(c => {
+						// 	c.context[contextId] = _props.value;
+						// 	enqueueRender(c);
+						// });
+						subs.some(enqueueRender);
+					}
+				};
+
+				this.sub = c => {
+					subs.push(c);
+					let old = c.componentWillUnmount;
+					c.componentWillUnmount = () => {
+						subs.splice(subs.indexOf(c), 1);
+						if (old) old.call(c);
+					};
+				};
+			}
+
+			return props.children;
+		}
+	};
+
+	// Devtools needs access to the context object when it
+	// encounters a Provider. This is necessary to support
+	// setting `displayName` on the context object instead
+	// of on the component itself. See:
+	// https://reactjs.org/docs/context.html#contextdisplayname
+
+	return (context.Provider._contextRef = context.Consumer.contextType = context);
+}