42 lines
No EOL
1.4 KiB
JavaScript
42 lines
No EOL
1.4 KiB
JavaScript
"use strict";
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exports.__esModule = true;
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exports.default = void 0;
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/**
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* Edge 16 & 17 do not infer function.name from variable assignment.
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* All other `function.name` behavior works fine, so we can skip most of @babel/transform-function-name.
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* @see https://kangax.github.io/compat-table/es6/#test-function_name_property_variables_(function)
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*
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* Note: contrary to various Github issues, Edge 16+ *does* correctly infer the name of Arrow Functions.
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* The variable declarator name inference issue only affects function expressions, so that's all we fix here.
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*
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* A Note on Minification: Terser undoes this transform *by default* unless `keep_fnames` is set to true.
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* There is by design - if Function.name is critical to your application, you must configure
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* your minifier to preserve function names.
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*/
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var _default = ({
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types: t
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}) => ({
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name: "transform-edge-function-name",
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visitor: {
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FunctionExpression: {
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exit(path) {
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if (!path.node.id && t.isIdentifier(path.parent.id)) {
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const id = t.cloneNode(path.parent.id);
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const binding = path.scope.getBinding(id.name); // if the binding gets reassigned anywhere, rename it
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if (binding == null ? void 0 : binding.constantViolations.length) {
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path.scope.rename(id.name);
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}
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path.node.id = id;
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}
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}
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}
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}
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});
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exports.default = _default;
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module.exports = exports.default; |