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63 lines
2.5 KiB
63 lines
2.5 KiB
2 years ago
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(function(){/*
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* Named exports support for legacy module formats in SystemJS 2.0
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*
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* Note: This extra is deprecated as the behaviour is now the default in core,
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* so will be removed in the next major.
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*/
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(function (global) {
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var systemJSPrototype = global.System.constructor.prototype;
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// hook System.register to know the last declaration binding
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var lastRegisterDeclare;
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var systemRegister = systemJSPrototype.register;
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systemJSPrototype.register = function (name, deps, declare) {
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lastRegisterDeclare = typeof name === 'string' ? declare : deps;
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systemRegister.apply(this, arguments);
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};
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var getRegister = systemJSPrototype.getRegister;
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systemJSPrototype.getRegister = function () {
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var register = getRegister.call(this);
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// if it is an actual System.register call, then its ESM
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// -> dont add named exports
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if (!register || register[1] === lastRegisterDeclare || register[1].length === 0)
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return register;
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// otherwise it was provided by a custom instantiator
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// -> extend the registration with named exports support
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var registerDeclare = register[1];
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register[1] = function (_export, _context) {
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// hook the _export function to note the default export
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var defaultExport, hasDefaultExport = false;
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var declaration = registerDeclare.call(this, function (name, value) {
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if (typeof name === 'object' && name && name.__useDefault)
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defaultExport = name.default, hasDefaultExport = true;
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else if (name === 'default')
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defaultExport = value;
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else if (name === '__useDefault')
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hasDefaultExport = true;
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_export(name, value);
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}, _context);
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// hook the execute function
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var execute = declaration.execute;
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if (execute)
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declaration.execute = function () {
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execute.call(this);
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// do a bulk export of the default export object
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// to export all its names as named exports
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if (hasDefaultExport)
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for (var exportName in defaultExport) {
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if (
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Object.prototype.hasOwnProperty.call(defaultExport, exportName) // Check if epoxrt name is not inherited, safe for Object.create(null)
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&& exportName !== 'default' // default is not a named export
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) {
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_export(exportName, defaultExport[exportName]);
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}
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}
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};
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return declaration;
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};
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return register;
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};
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})(typeof self !== 'undefined' ? self : global);})();
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