shipped-proposals.js
631422e9a504validity_dates

shipped-proposals.js
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			/* eslint sort-keys: "error" */
			// These mappings represent the syntax proposals that have been
			// shipped by browsers, and are enabled by the `shippedProposals` option.

			const proposalPlugins = new Set([
			"proposal-class-properties",
			"proposal-private-methods"
			]);

			// use intermediary object to enforce alphabetical key order
			const pluginSyntaxObject = {
			"proposal-async-generator-functions": "syntax-async-generators",
			"proposal-class-properties": "syntax-class-properties",
			"proposal-json-strings": "syntax-json-strings",
			"proposal-nullish-coalescing-operator": "syntax-nullish-coalescing-operator",
			"proposal-numeric-separator": "syntax-numeric-separator",
			"proposal-object-rest-spread": "syntax-object-rest-spread",
			"proposal-optional-catch-binding": "syntax-optional-catch-binding",
			"proposal-optional-chaining": "syntax-optional-chaining",
			// note: we don't have syntax-private-methods
			"proposal-private-methods": "syntax-class-properties",
			"proposal-unicode-property-regex": null,
			};

			const pluginSyntaxEntries = Object.keys(pluginSyntaxObject).map(function (key) {
			return [key, pluginSyntaxObject[key]];
			});

			const pluginSyntaxMap = new Map(pluginSyntaxEntries);

			module.exports = { pluginSyntaxMap, proposalPlugins };