@observablehq/runtime - npm Package Compare versions

Comparing version 5.7.4 to 5.8.0

package.json

 {
   "name": "@observablehq/runtime",
-  "version": "5.7.4",
+  "version": "5.8.0",
   "author": {
@@ -5,0 +5,0 @@ "name": "Observable, Inc.",

src/module.js

@@ -53,4 +53,4 @@ import {constant} from "./constant.js";
 
-function module_variable(observer) {
-  return new Variable(TYPE_NORMAL, this, observer);
+function module_variable(observer, options) {
+  return new Variable(TYPE_NORMAL, this, observer, options);
 }
@@ -57,0 +57,0 @@

src/variable.js

@@ -13,3 +13,3 @@ import {map} from "./array.js";
 
-export function Variable(type, module, observer) {
+export function Variable(type, module, observer, options) {
   if (!observer) observer = no_observer;
@@ -30,2 +30,3 @@ Object.defineProperties(this, {
     _rejector: {value: variable_rejector(this)},
+    _shadow: {value: initShadow(module, options)},
     _type: {value: type},
@@ -41,2 +42,3 @@ _value: {value: undefined, writable: true},
   _rejected: {value: variable_rejected, writable: true, configurable: true},
+  _resolve: {value: variable_resolve, writable: true, configurable: true},
   define: {value: variable_define, writable: true, configurable: true},
@@ -47,2 +49,10 @@ delete: {value: variable_delete, writable: true, configurable: true},
 
+function initShadow(module, options) {
+  if (!options?.shadow) return null;
+  return new Map(
+    Object.entries(options.shadow)
+      .map(([name, definition]) => [name, (new Variable(TYPE_IMPLICIT, module)).define([], definition)])
+  );
+}
+
 function variable_attach(variable) {
@@ -96,3 +106,3 @@ variable._module._runtime._dirty.add(variable);
     name == null ? null : String(name),
-    inputs == null ? [] : map.call(inputs, this._module._resolve, this._module),
+    inputs == null ? [] : map.call(inputs, this._resolve, this),
     typeof definition === "function" ? definition : constant(definition)
@@ -102,2 +112,6 @@ );
 
+function variable_resolve(name) {
+  return this._shadow?.get(name) ?? this._module._resolve(name);
+}
+
 function variable_defineImpl(name, inputs, definition) {
@@ -104,0 +118,0 @@ const scope = this._module._scope, runtime = this._module._runtime;

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Improved metrics

Total package byte prevSize

184909

increased by0.53%

Lines of code

1226

increased by1.07%

No dependency changes