fix style issues

.eslintrc.json

@@ -0,0 +1,42 @@
+{
+	"env": {
+		"browser": true,
+		"es2021": true
+	},
+	"extends": "standard",
+	"parserOptions": {
+		"ecmaVersion": "latest",
+		"sourceType": "module"
+	},
+	"rules": {
+		"no-tabs": [
+			"error",
+			{
+				"allowIndentationTabs": true
+			}
+		],
+		"indent": [
+			"error",
+			"tab"
+		],
+		"linebreak-style": [
+			"error",
+			"unix"
+		],
+		"quotes": [
+			"error",
+			"double"
+		],
+		"semi": [
+			"error",
+			"always"
+		],
+		"brace-style": [
+			"error",
+			"stroustrup",
+			{
+				"allowSingleLine": false
+			}
+		]
+	}
+}

.gitignore

@@ -0,0 +1 @@
+node_modules/*

.stylelintrc.json

@@ -0,0 +1,6 @@
+{
+	"extends": [
+		"stylelint-config-standard"
+	],
+	"rules": {}
+}

css/gallery.css

@@ -1,8 +1,7 @@
 #gallery-container {
     display: grid;
     grid-template-columns: auto auto;
-    column-gap: 16px;
-    row-gap: 16px;
+    gap: 16px 16px;
     margin-top: 1em;
     margin-bottom: 1em;
 }

package.json

@@ -0,0 +1,15 @@
+{
+	"scripts": {
+		"lint": "html-validator --continue; stylelint --formatter verbose --fix css/*.css; DEBUG=eslint:cli-engine eslint --fix scripts/"
+	},
+	"devDependencies": {
+		"eslint": "^8.43.0",
+		"eslint-config-standard": "^17.1.0",
+		"eslint-plugin-import": "^2.27.5",
+		"eslint-plugin-n": "^16.0.1",
+		"eslint-plugin-promise": "^6.1.1",
+		"stylelint": "^15.9.0",
+		"stylelint-config-standard": "^33.0.0",
+		"w3c-html-validator": "^1.4.0"
+	}
+}

scripts/ModalImage.js

@@ -42,7 +42,7 @@ class ModalImage extends HTMLElement {
 	}
 
 	connectedCallback () {
-		const thumbnail = this.getAttribute("thumb")
+		const thumbnail = this.getAttribute("thumb");
 		const src = this.getAttribute("src");
 		const alt = this.getAttribute("alt");
 		this.#src = src;