Breaking: js-yaml bump from v3 to v4. Fixes #2126

package.json

@@ -92,7 +92,6 @@
 		"eslint-config-prettier": "^9.1.0",
 		"globals": "^15.6.0",
 		"husky": "^9.0.11",
-		"js-yaml": "^4.1.0",
 		"jsdoc": "^4.0.3",
 		"lint-staged": "^15.2.7",
 		"markdown-it-emoji": "^3.0.0",
@@ -128,6 +127,7 @@
 		"gray-matter": "^4.0.3",
 		"is-glob": "^4.0.3",
 		"iso-639-1": "^3.1.2",
+		"js-yaml": "^4.1.0",
 		"kleur": "^4.1.5",
 		"liquidjs": "^10.14.0",
 		"luxon": "^3.4.4",

src/Template.js

@@ -502,7 +502,7 @@ class Template extends TemplateContent {
 	}
 
 	async addComputedData(data) {
-		if (this.config.keys.computed in data) {
+		if (isPlainObject(data?.[this.config.keys.computed])) {
 			this.computedData = new ComputedData(this.config);
 
 			// Note that `permalink` is only a thing that gets consumed—it does not go directly into generated data

src/UserConfig.js

@@ -1,5 +1,7 @@
 import chalk from "kleur";
 import { DateTime } from "luxon";
+import yaml from "js-yaml";
+
 import debugUtil from "debug";
 import { RetrieveGlobals } from "node-retrieve-globals";
 import { DeepCopy, TemplatePath } from "@11ty/eleventy-utils";
@@ -128,6 +130,7 @@ class UserConfig {
 
 			// Supplementary engines
 			engines: {
+				yaml: yaml.load.bind(yaml),
 				node: (frontMatterCode, { filePath }) => {
 					let vm = new RetrieveGlobals(frontMatterCode, {
 						filePath,

src/Util/ReservedData.js

@@ -23,6 +23,10 @@ class ReservedData {
 
 	// Check in the data cascade for reserved data properties.
 	static getReservedKeys(data) {
+		if (!data) {
+			return [];
+		}
+
 		let keys = this.properties.filter((key) => {
 			return key in data;
 		});