Fix legacy build

The build process failed because webpack does not allow failed imports
when it is run as a module.
This detects modules with default exports and only generates import
statements for default exports where they are available.

config/jsdoc/plugins/api.cjs

@@ -0,0 +1,181 @@
+/* eslint-disable import/no-commonjs */
+
+/**
+ * Define an @api tag
+ * @param {Object} dictionary The tag dictionary.
+ */
+exports.defineTags = function (dictionary) {
+  dictionary.defineTag('api', {
+    mustNotHaveValue: true,
+    canHaveType: false,
+    canHaveName: false,
+    onTagged: function (doclet, tag) {
+      includeTypes(doclet);
+      doclet.stability = 'stable';
+    },
+  });
+};
+
+/*
+ * Based on @api annotations, and assuming that items with no @api annotation
+ * should not be documented, this plugin removes undocumented symbols
+ * from the documentation.
+ */
+
+const api = {};
+const classes = {};
+const types = {};
+const modules = {};
+
+function includeAugments(doclet) {
+  // Make sure that `observables` and `fires` are taken from an already processed `class` doclet.
+  // This is necessary because JSDoc generates multiple doclets with the same longname.
+  const cls = classes[doclet.longname];
+  if (cls.observables && !doclet.observables) {
+    doclet.observables = cls.observables;
+  }
+  if (doclet.fires && cls.fires) {
+    for (let i = 0, ii = cls.fires.length; i < ii; ++i) {
+      const fires = cls.fires[i];
+      if (doclet.fires.indexOf(fires) == -1) {
+        doclet.fires.push(fires);
+      }
+    }
+  }
+  if (cls.fires && !doclet.fires) {
+    doclet.fires = cls.fires;
+  }
+
+  const augments = doclet.augments;
+  if (augments) {
+    let cls;
+    for (let i = augments.length - 1; i >= 0; --i) {
+      cls = classes[augments[i]];
+      if (cls) {
+        includeAugments(cls);
+        if (cls.fires) {
+          if (!doclet.fires) {
+            doclet.fires = [];
+          }
+          cls.fires.forEach(function (f) {
+            if (doclet.fires.indexOf(f) == -1) {
+              doclet.fires.push(f);
+            }
+          });
+        }
+        if (cls.observables) {
+          if (!doclet.observables) {
+            doclet.observables = [];
+          }
+          cls.observables.forEach(function (f) {
+            if (doclet.observables.indexOf(f) == -1) {
+              doclet.observables.push(f);
+            }
+          });
+        }
+        cls._hideConstructor = true;
+      }
+    }
+  }
+}
+
+function extractTypes(item) {
+  item.type.names.forEach(function (type) {
+    const match = type.match(/^(.*<)?([^>]*)>?$/);
+    if (match) {
+      modules[match[2]] = true;
+      types[match[2]] = true;
+    }
+  });
+}
+
+function includeTypes(doclet) {
+  if (doclet.params) {
+    doclet.params.forEach(extractTypes);
+  }
+  if (doclet.returns) {
+    doclet.returns.forEach(extractTypes);
+  }
+  if (doclet.properties) {
+    doclet.properties.forEach(extractTypes);
+  }
+  if (doclet.type && doclet.meta.code.type == 'MemberExpression') {
+    extractTypes(doclet);
+  }
+}
+
+function sortOtherMembers(doclet) {
+  if (doclet.fires) {
+    doclet.fires.sort(function (a, b) {
+      return a.split(/#?event:/)[1] < b.split(/#?event:/)[1] ? -1 : 1;
+    });
+  }
+  if (doclet.observables) {
+    doclet.observables.sort(function (a, b) {
+      return a.name < b.name ? -1 : 1;
+    });
+  }
+}
+
+exports.handlers = {
+  newDoclet: function (e) {
+    const doclet = e.doclet;
+    if (doclet.stability) {
+      modules[doclet.longname.split(/[~\.]/).shift()] = true;
+      api[doclet.longname.split('#')[0]] = true;
+    }
+    if (doclet.kind == 'class') {
+      if (!(doclet.longname in classes)) {
+        classes[doclet.longname] = doclet;
+      } else if ('augments' in doclet) {
+        classes[doclet.longname].augments = doclet.augments;
+      }
+    }
+    if (doclet.name === doclet.longname && !doclet.memberof) {
+      // Make sure anonymous default exports are documented
+      doclet.setMemberof(doclet.longname);
+    }
+  },
+
+  parseComplete: function (e) {
+    const doclets = e.doclets;
+    const byLongname = doclets.index.longname;
+    for (let i = doclets.length - 1; i >= 0; --i) {
+      const doclet = doclets[i];
+      if (doclet.stability) {
+        if (doclet.kind == 'class') {
+          includeAugments(doclet);
+        }
+        sortOtherMembers(doclet);
+        // Always document namespaces and items with stability annotation
+        continue;
+      }
+      if (doclet.kind == 'module' && doclet.longname in modules) {
+        // Document all modules that are referenced by the API
+        continue;
+      }
+      if (doclet.isEnum || doclet.kind == 'typedef') {
+        continue;
+      }
+      if (doclet.kind == 'class' && doclet.longname in api) {
+        // Mark undocumented classes with documented members as unexported.
+        // This is used in ../template/tmpl/container.tmpl to hide the
+        // constructor from the docs.
+        doclet._hideConstructor = true;
+        includeAugments(doclet);
+        sortOtherMembers(doclet);
+      } else if (!doclet._hideConstructor) {
+        // Remove all other undocumented symbols
+        doclet.undocumented = true;
+      }
+      if (
+        doclet.memberof &&
+        byLongname[doclet.memberof] &&
+        byLongname[doclet.memberof][0].isEnum &&
+        !byLongname[doclet.memberof][0].properties.some((p) => p.stability)
+      ) {
+        byLongname[doclet.memberof][0].undocumented = true;
+      }
+    }
+  },
+};