"use strict";
|
|
Object.defineProperty(exports, "__esModule", {
|
value: true
|
});
|
exports.default = void 0;
|
|
var _helperPluginUtils = require("@babel/helper-plugin-utils");
|
|
var _core = require("@babel/core");
|
|
var _default = (0, _helperPluginUtils.declare)(api => {
|
api.assertVersion(7);
|
return {
|
name: "transform-typeof-symbol",
|
visitor: {
|
Scope({
|
scope
|
}) {
|
if (!scope.getBinding("Symbol")) {
|
return;
|
}
|
|
scope.rename("Symbol");
|
},
|
|
UnaryExpression(path) {
|
const {
|
node,
|
parent
|
} = path;
|
if (node.operator !== "typeof") return;
|
|
if (path.parentPath.isBinaryExpression() && _core.types.EQUALITY_BINARY_OPERATORS.indexOf(parent.operator) >= 0) {
|
const opposite = path.getOpposite();
|
|
if (opposite.isLiteral() && opposite.node.value !== "symbol" && opposite.node.value !== "object") {
|
return;
|
}
|
}
|
|
let isUnderHelper = path.findParent(path => {
|
if (path.isFunction()) {
|
var _path$get;
|
|
return ((_path$get = path.get("body.directives.0")) == null ? void 0 : _path$get.node.value.value) === "@babel/helpers - typeof";
|
}
|
});
|
if (isUnderHelper) return;
|
const helper = this.addHelper("typeof");
|
isUnderHelper = path.findParent(path => {
|
return path.isVariableDeclarator() && path.node.id === helper || path.isFunctionDeclaration() && path.node.id && path.node.id.name === helper.name;
|
});
|
|
if (isUnderHelper) {
|
return;
|
}
|
|
const call = _core.types.callExpression(helper, [node.argument]);
|
|
const arg = path.get("argument");
|
|
if (arg.isIdentifier() && !path.scope.hasBinding(arg.node.name, true)) {
|
const unary = _core.types.unaryExpression("typeof", _core.types.cloneNode(node.argument));
|
|
path.replaceWith(_core.types.conditionalExpression(_core.types.binaryExpression("===", unary, _core.types.stringLiteral("undefined")), _core.types.stringLiteral("undefined"), call));
|
} else {
|
path.replaceWith(call);
|
}
|
}
|
|
}
|
};
|
});
|
|
exports.default = _default;
|