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Name	Size	Permission	Action
diff	[ DIR ]	drwxrwxr-x
cjs.js	115 B	-rw-rw-r--
clone-element.js	1.13 KB	-rw-rw-r--
component.js	7.75 KB	-rw-rw-r--
constants.js	701 B	-rw-rw-r--
create-context.js	2.15 KB	-rw-rw-r--
create-element.js	2.91 KB	-rw-rw-r--
index.d.ts	10.75 KB	-rw-rw-r--
index.js	408 B	-rw-rw-r--
internal.d.ts	6.03 KB	-rw-rw-r--
jsx.d.ts	99.48 KB	-rw-rw-r--
options.js	566 B	-rw-rw-r--
render.js	2.35 KB	-rw-rw-r--
util.js	911 B	-rw-rw-r--

Code Editor : create-context.js

import { enqueueRender } from './component';

export let i = 0;

export function createContext(defaultValue, contextId) {
	contextId = '__cC' + i++;

const context = {
		_id: contextId,
		_defaultValue: defaultValue,
		/** @type {FunctionComponent} */
		Consumer(props, contextValue) {
			// return props.children(
			// 	context[contextId] ? context[contextId].props.value : defaultValue
			// );
			return props.children(contextValue);
		},
		/** @type {FunctionComponent} */
		Provider(props) {
			if (!this.getChildContext) {
				/** @type {Component[]} */
				let subs = [];
				let 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(c => {
							c._force = true;
							enqueueRender(c);
						});
					}
				};

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);
}

Urban Research Lab

Urban Research Lab

The Urban Research Lab (URL) at IIIT-Delhi was established in 2020, during a time when the pandemic brought the complexities of urban life more visible than ever. What started as an initiative by faculty and students has grown into a collaborative space for critically exploring and reimagining the urban questions through research, dialogue, and interdisciplinary engagement.