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- /**
- * Converts destructured parameters with default values to non-shorthand syntax.
- * This fixes the only arguments-related bug in ES Modules-supporting browsers (Edge 16 & 17).
- * Use this plugin instead of @babel/plugin-transform-parameters when targeting ES Modules.
- */
- export default ({ types: t }) => {
- const isArrowParent = p =>
- p.parentKey === "params" &&
- p.parentPath &&
- t.isArrowFunctionExpression(p.parentPath);
- return {
- name: "transform-edge-default-parameters",
- visitor: {
- AssignmentPattern(path) {
- const arrowArgParent = path.find(isArrowParent);
- if (arrowArgParent && path.parent.shorthand) {
- // In Babel 7+, there is no way to force non-shorthand properties.
- path.parent.shorthand = false;
- (path.parent.extra || {}).shorthand = false;
- // So, to ensure non-shorthand, rename the local identifier so it no longer matches:
- path.scope.rename(path.parent.key.name);
- }
- },
- },
- };
- };
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