index.js
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index.js
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			"use strict";

			exports.__esModule = true;
			exports.default = _default;

			/**
			* Fixes block-shadowed let/const bindings in Safari 10/11.
			* https://kangax.github.io/compat-table/es6/#test-let_scope_shadow_resolution
			*/
			function _default({
			types: t
			}) {
			return {
			name: "transform-safari-block-shadowing",
			visitor: {
			VariableDeclarator(path) {
			// the issue only affects let and const bindings:
			const kind = path.parent.kind;
			if (kind !== "let" && kind !== "const") return; // ignore non-block-scoped bindings:

			const block = path.scope.block;
			if (t.isFunction(block) \|\| t.isProgram(block)) return;
			const bindings = t.getOuterBindingIdentifiers(path.node.id);

			for (const name of Object.keys(bindings)) {
			let scope = path.scope; // ignore parent bindings (note: impossible due to let/const?)

			if (!scope.hasOwnBinding(name)) continue; // check if shadowed within the nearest function/program boundary

			while (scope = scope.parent) {
			if (scope.hasOwnBinding(name)) {
			path.scope.rename(name);
			break;
			}

			if (t.isFunction(scope.block) \|\| t.isProgram(scope.block)) {
			break;
			}
			}
			}
			}

			}
			};
			}

			module.exports = exports.default;