diff --git a/package.json b/package.json
index 87310dc409..e11ec8445c 100644
--- a/package.json
+++ b/package.json
@@ -24,7 +24,7 @@
     "dev:shared": "rollup -c rollup/rollup.config.shared.js -w",
     "pretest": "npm run build",
     "prepublish": "npm run build && npm run lint",
-    "prettier": "prettier --use-tabs --single-quote --write \"src/**/*.ts\" \"src/**/*.js\""
+    "prettier": "prettier --use-tabs --single-quote --trailing-comma es5 --write \"src/**/*.ts\""
   },
   "repository": {
     "type": "git",
diff --git a/src/generators/Generator.ts b/src/generators/Generator.ts
index 09b7e3409a..084f1e7d90 100644
--- a/src/generators/Generator.ts
+++ b/src/generators/Generator.ts
@@ -84,7 +84,7 @@ export default class Generator {
 			enter: (node: Node) => {
 				this.code.addSourcemapLocation(node.start);
 				this.code.addSourcemapLocation(node.end);
-			}
+			},
 		});
 	}
 
@@ -127,7 +127,7 @@ export default class Generator {
 					if (lexicalDepth === 0 && context)
 						code.overwrite(node.start, node.end, context, {
 							storeName: true,
-							contentOnly: false
+							contentOnly: false,
 						});
 				} else if (isReference(node, parent)) {
 					const { name } = flattenReference(node);
@@ -182,13 +182,13 @@ export default class Generator {
 			leave(node: Node) {
 				if (/^Function/.test(node.type)) lexicalDepth -= 1;
 				if (node._scope) scope = scope.parent;
-			}
+			},
 		});
 
 		return {
 			dependencies: expression._dependencies, // TODO probably a better way to do this
 			contexts: usedContexts,
-			snippet: `[✂${expression.start}-${expression.end}✂]`
+			snippet: `[✂${expression.start}-${expression.end}✂]`,
 		};
 	}
 
@@ -227,7 +227,7 @@ export default class Generator {
 
 			leave(node: Node) {
 				if (node._scope) scope = scope.parent;
-			}
+			},
 		});
 
 		dependencies.forEach(name => {
@@ -294,7 +294,7 @@ export default class Generator {
 
 		function addString(str: string) {
 			compiled.addSource({
-				content: new MagicString(str)
+				content: new MagicString(str),
 			});
 		}
 
@@ -308,7 +308,7 @@ export default class Generator {
 		if (!parts.length) {
 			compiled.addSource({
 				filename,
-				content: new MagicString(this.source).remove(0, this.source.length)
+				content: new MagicString(this.source).remove(0, this.source.length),
 			});
 		}
 
@@ -322,7 +322,7 @@ export default class Generator {
 
 			compiled.addSource({
 				filename,
-				content: snippet
+				content: snippet,
 			});
 		});
 
@@ -333,9 +333,9 @@ export default class Generator {
 			code: compiled.toString(),
 			map: compiled.generateMap({
 				includeContent: true,
-				file: options.outputFilename
+				file: options.outputFilename,
 			}),
-			css: this.css
+			css: this.css,
 		};
 	}
 
@@ -493,7 +493,7 @@ export default class Generator {
 				const { key } = templateProperties.onrender;
 				this.code.overwrite(key.start, key.end, 'oncreate', {
 					storeName: true,
-					contentOnly: false
+					contentOnly: false,
 				});
 				templateProperties.oncreate = templateProperties.onrender;
 			}
@@ -502,7 +502,7 @@ export default class Generator {
 				const { key } = templateProperties.onteardown;
 				this.code.overwrite(key.start, key.end, 'ondestroy', {
 					storeName: true,
-					contentOnly: false
+					contentOnly: false,
 				});
 				templateProperties.ondestroy = templateProperties.onteardown;
 			}
@@ -597,7 +597,7 @@ export default class Generator {
 			computations,
 			hasJs,
 			namespace,
-			templateProperties
+			templateProperties,
 		};
 	}
 }
diff --git a/src/generators/dom/Block.ts b/src/generators/dom/Block.ts
index f99c1d52c9..d4ad5608f7 100644
--- a/src/generators/dom/Block.ts
+++ b/src/generators/dom/Block.ts
@@ -93,7 +93,7 @@ export default class Block {
 			outro: new CodeBuilder(),
 			unmount: new CodeBuilder(),
 			detachRaw: new CodeBuilder(),
-			destroy: new CodeBuilder()
+			destroy: new CodeBuilder(),
 		};
 
 		this.hasIntroMethod = false; // a block could have an intro method but not intro transitions, e.g. if a sibling block has intros
diff --git a/src/generators/dom/index.ts b/src/generators/dom/index.ts
index cfb3bacdca..78258bac2b 100644
--- a/src/generators/dom/index.ts
+++ b/src/generators/dom/index.ts
@@ -63,7 +63,7 @@ export default function dom(
 		computations,
 		hasJs,
 		templateProperties,
-		namespace
+		namespace,
 	} = generator.parseJs();
 
 	const { block, state } = preprocess(generator, namespace, parsed.html);
@@ -74,7 +74,7 @@ export default function dom(
 
 	const builders = {
 		main: new CodeBuilder(),
-		_set: new CodeBuilder()
+		_set: new CodeBuilder(),
 	};
 
 	if (computations.length) {
@@ -319,7 +319,7 @@ export default function dom(
 
 				leave(node) {
 					if (node._scope) scope = scope.parent;
-				}
+				},
 			});
 
 			if (key === 'transitionManager') {
@@ -343,6 +343,6 @@ export default function dom(
 
 	return generator.generate(builders.main.toString(), options, {
 		name,
-		format
+		format,
 	});
 }
diff --git a/src/generators/dom/preprocess.ts b/src/generators/dom/preprocess.ts
index 595b753d57..93cbbf7e4b 100644
--- a/src/generators/dom/preprocess.ts
+++ b/src/generators/dom/preprocess.ts
@@ -26,7 +26,7 @@ const elementsWithoutText = new Set([
 	'optgroup',
 	'select',
 	'ul',
-	'video'
+	'video',
 ]);
 
 const preprocessors = {
@@ -40,7 +40,7 @@ const preprocessors = {
 		block.addDependencies(dependencies);
 
 		node._state = getChildState(state, {
-			name: block.getUniqueName('text')
+			name: block.getUniqueName('text'),
 		});
 	},
 
@@ -87,7 +87,7 @@ const preprocessors = {
 			block.addDependencies(dependencies);
 
 			node._block = block.child({
-				name: generator.getUniqueName(`create_if_block`)
+				name: generator.getUniqueName(`create_if_block`),
 			});
 
 			node._state = getChildState(state);
@@ -107,7 +107,7 @@ const preprocessors = {
 				attachBlocks(node.else.children[0]);
 			} else if (node.else) {
 				node.else._block = block.child({
-					name: generator.getUniqueName(`create_if_block`)
+					name: generator.getUniqueName(`create_if_block`),
 				});
 
 				node.else._state = getChildState(state);
@@ -181,11 +181,11 @@ const preprocessors = {
 
 			indexNames,
 			listNames,
-			params: block.params.concat(listName, context, indexName)
+			params: block.params.concat(listName, context, indexName),
 		});
 
 		node._state = getChildState(state, {
-			inEachBlock: true
+			inEachBlock: true,
 		});
 
 		generator.blocks.push(node._block);
@@ -195,7 +195,7 @@ const preprocessors = {
 
 		if (node.else) {
 			node.else._block = block.child({
-				name: generator.getUniqueName(`${node._block.name}_else`)
+				name: generator.getUniqueName(`${node._block.name}_else`),
 			});
 
 			node.else._state = getChildState(state);
@@ -235,7 +235,7 @@ const preprocessors = {
 				namespace: node.name === 'svg'
 					? 'http://www.w3.org/2000/svg'
 					: state.namespace,
-				allUsedContexts: []
+				allUsedContexts: [],
 			});
 		}
 
@@ -267,7 +267,7 @@ const preprocessors = {
 				);
 
 				node._block = block.child({
-					name: generator.getUniqueName(`create_${name}_yield_fragment`)
+					name: generator.getUniqueName(`create_${name}_yield_fragment`),
 				});
 
 				generator.blocks.push(node._block);
@@ -278,7 +278,7 @@ const preprocessors = {
 				preprocessChildren(generator, block, node._state, node);
 			}
 		}
-	}
+	},
 };
 
 function preprocessChildren(
@@ -359,13 +359,13 @@ export default function preprocess(
 		indexNames: new Map(),
 		listNames: new Map(),
 
-		dependencies: new Set()
+		dependencies: new Set(),
 	});
 
 	const state: State = {
 		namespace,
 		parentNode: null,
-		isTopLevel: true
+		isTopLevel: true,
 	};
 
 	generator.blocks.push(block);
diff --git a/src/generators/dom/visitors/Component/Attribute.ts b/src/generators/dom/visitors/Component/Attribute.ts
index 1bd477a396..5549931864 100644
--- a/src/generators/dom/visitors/Component/Attribute.ts
+++ b/src/generators/dom/visitors/Component/Attribute.ts
@@ -15,12 +15,12 @@ export default function visitAttribute(
 		// attributes without values, e.g. <textarea readonly>
 		local.staticAttributes.push({
 			name: attribute.name,
-			value: true
+			value: true,
 		});
 	} else if (attribute.value.length === 0) {
 		local.staticAttributes.push({
 			name: attribute.name,
-			value: `''`
+			value: `''`,
 		});
 	} else if (attribute.value.length === 1) {
 		const value = attribute.value[0];
@@ -32,7 +32,7 @@ export default function visitAttribute(
 				: value.data;
 			local.staticAttributes.push({
 				name: attribute.name,
-				value: result
+				value: result,
 			});
 		} else {
 			// simple dynamic attributes
@@ -42,7 +42,7 @@ export default function visitAttribute(
 			local.dynamicAttributes.push({
 				name: attribute.name,
 				value: snippet,
-				dependencies
+				dependencies,
 			});
 		}
 	} else {
@@ -72,7 +72,7 @@ export default function visitAttribute(
 		local.dynamicAttributes.push({
 			name: attribute.name,
 			value,
-			dependencies: allDependencies
+			dependencies: allDependencies,
 		});
 	}
 }
diff --git a/src/generators/dom/visitors/Component/Binding.ts b/src/generators/dom/visitors/Component/Binding.ts
index d84c2bcfb9..8de5379202 100644
--- a/src/generators/dom/visitors/Component/Binding.ts
+++ b/src/generators/dom/visitors/Component/Binding.ts
@@ -50,7 +50,7 @@ export default function visitBinding(
 		name: attribute.name,
 		value: snippet,
 		obj,
-		prop
+		prop,
 	});
 
 	const setter = getSetter({
@@ -60,7 +60,7 @@ export default function visitBinding(
 		context: '_context',
 		attribute,
 		dependencies,
-		value: 'value'
+		value: 'value',
 	});
 
 	generator.hasComplexBindings = true;
diff --git a/src/generators/dom/visitors/Component/Component.ts b/src/generators/dom/visitors/Component/Component.ts
index e25088cc2e..e107371a50 100644
--- a/src/generators/dom/visitors/Component/Component.ts
+++ b/src/generators/dom/visitors/Component/Component.ts
@@ -26,14 +26,14 @@ const order = {
 	Attribute: 1,
 	EventHandler: 2,
 	Binding: 3,
-	Ref: 4
+	Ref: 4,
 };
 
 const visitors = {
 	Attribute: visitAttribute,
 	EventHandler: visitEventHandler,
 	Binding: visitBinding,
-	Ref: visitRef
+	Ref: visitRef,
 };
 
 export default function visitComponent(
@@ -60,7 +60,7 @@ export default function visitComponent(
 		bindings: [],
 
 		create: new CodeBuilder(),
-		update: new CodeBuilder()
+		update: new CodeBuilder(),
 	};
 
 	const isTopLevel = !state.parentNode;
@@ -114,7 +114,7 @@ export default function visitComponent(
 
 	const componentInitProperties = [
 		`target: ${!isTopLevel ? state.parentNode : 'null'}`,
-		`_root: ${block.component}._root`
+		`_root: ${block.component}._root`,
 	];
 
 	// Component has children, put them in a separate {{yield}} block
diff --git a/src/generators/dom/visitors/EachBlock.ts b/src/generators/dom/visitors/EachBlock.ts
index 4e0358b85a..27e639a0d1 100644
--- a/src/generators/dom/visitors/EachBlock.ts
+++ b/src/generators/dom/visitors/EachBlock.ts
@@ -30,7 +30,7 @@ export default function visitEachBlock(
 		i,
 		params,
 		anchor,
-		mountOrIntro
+		mountOrIntro,
 	};
 
 	const { snippet } = block.contextualise(node.expression);
@@ -144,7 +144,7 @@ function keyed(
 		i,
 		params,
 		anchor,
-		mountOrIntro
+		mountOrIntro,
 	}
 ) {
 	const key = block.getUniqueName('key');
@@ -350,7 +350,7 @@ function unkeyed(
 		i,
 		params,
 		anchor,
-		mountOrIntro
+		mountOrIntro,
 	}
 ) {
 	block.builders.create.addBlock(deindent`
diff --git a/src/generators/dom/visitors/Element/Binding.ts b/src/generators/dom/visitors/Element/Binding.ts
index e32c8cbf0b..a7c8d1aa1e 100644
--- a/src/generators/dom/visitors/Element/Binding.ts
+++ b/src/generators/dom/visitors/Element/Binding.ts
@@ -67,7 +67,7 @@ export default function visitBinding(
 		context: '_svelte',
 		attribute,
 		dependencies,
-		value
+		value,
 	});
 	let updateElement = `${state.parentNode}.${attribute.name} = ${snippet};`;
 	const lock = block.alias(`${state.parentNode}_updating`);
diff --git a/src/generators/dom/visitors/Element/Element.ts b/src/generators/dom/visitors/Element/Element.ts
index 12ad94448a..d5cb5c5bf1 100644
--- a/src/generators/dom/visitors/Element/Element.ts
+++ b/src/generators/dom/visitors/Element/Element.ts
@@ -13,21 +13,21 @@ import { Node } from '../../../../interfaces';
 import { State } from '../../interfaces';
 
 const meta = {
-	':Window': visitWindow
+	':Window': visitWindow,
 };
 
 const order = {
 	Attribute: 1,
 	Binding: 2,
 	EventHandler: 3,
-	Ref: 4
+	Ref: 4,
 };
 
 const visitors = {
 	Attribute: visitAttribute,
 	EventHandler: visitEventHandler,
 	Binding: visitBinding,
-	Ref: visitRef
+	Ref: visitRef,
 };
 
 export default function visitElement(
@@ -136,7 +136,7 @@ export default function visitElement(
 				node.attributes.push({
 					type: 'Attribute',
 					name: 'value',
-					value: node.children
+					value: node.children,
 				});
 
 				node.children = [];
diff --git a/src/generators/dom/visitors/Element/EventHandler.ts b/src/generators/dom/visitors/Element/EventHandler.ts
index 1227925bf7..aff7fb4ac0 100644
--- a/src/generators/dom/visitors/Element/EventHandler.ts
+++ b/src/generators/dom/visitors/Element/EventHandler.ts
@@ -85,7 +85,7 @@ export default function visitEventHandler(
 	if (shouldHoist) {
 		generator.blocks.push(
 			<Block>{
-				render: () => handler
+				render: () => handler,
 			}
 		);
 	} else {
diff --git a/src/generators/dom/visitors/Element/lookup.ts b/src/generators/dom/visitors/Element/lookup.ts
index 5b9a42e0f1..cfa7543eaa 100644
--- a/src/generators/dom/visitors/Element/lookup.ts
+++ b/src/generators/dom/visitors/Element/lookup.ts
@@ -19,8 +19,8 @@ const lookup = {
 			'tfoot',
 			'th',
 			'thead',
-			'tr'
-		]
+			'tr',
+		],
 	},
 	allowfullscreen: { propertyName: 'allowFullscreen', appliesTo: ['iframe'] },
 	alt: { appliesTo: ['applet', 'area', 'img', 'input'] },
@@ -41,8 +41,8 @@ const lookup = {
 			'tfoot',
 			'td',
 			'th',
-			'tr'
-		]
+			'tr',
+		],
 	},
 	border: { appliesTo: ['img', 'object', 'table'] },
 	buffered: { appliesTo: ['audio', 'video'] },
@@ -77,8 +77,8 @@ const lookup = {
 			'optgroup',
 			'option',
 			'select',
-			'textarea'
-		]
+			'textarea',
+		],
 	},
 	download: { appliesTo: ['a', 'area'] },
 	draggable: {},
@@ -97,13 +97,13 @@ const lookup = {
 			'output',
 			'progress',
 			'select',
-			'textarea'
-		]
+			'textarea',
+		],
 	},
 	formaction: { appliesTo: ['input', 'button'] },
 	headers: { appliesTo: ['td', 'th'] },
 	height: {
-		appliesTo: ['canvas', 'embed', 'iframe', 'img', 'input', 'object', 'video']
+		appliesTo: ['canvas', 'embed', 'iframe', 'img', 'input', 'object', 'video'],
 	},
 	hidden: {},
 	high: { appliesTo: ['meter'] },
@@ -143,8 +143,8 @@ const lookup = {
 			'textarea',
 			'map',
 			'meta',
-			'param'
-		]
+			'param',
+		],
 	},
 	novalidate: { propertyName: 'noValidate', appliesTo: ['form'] },
 	open: { appliesTo: ['details'] },
@@ -181,8 +181,8 @@ const lookup = {
 			'script',
 			'source',
 			'track',
-			'video'
-		]
+			'video',
+		],
 	},
 	srcdoc: { appliesTo: ['iframe'] },
 	srclang: { appliesTo: ['track'] },
@@ -204,8 +204,8 @@ const lookup = {
 			'script',
 			'source',
 			'style',
-			'menu'
-		]
+			'menu',
+		],
 	},
 	usemap: { propertyName: 'useMap', appliesTo: ['img', 'input', 'object'] },
 	value: {
@@ -218,13 +218,13 @@ const lookup = {
 			'progress',
 			'param',
 			'select',
-			'textarea'
-		]
+			'textarea',
+		],
 	},
 	width: {
-		appliesTo: ['canvas', 'embed', 'iframe', 'img', 'input', 'object', 'video']
+		appliesTo: ['canvas', 'embed', 'iframe', 'img', 'input', 'object', 'video'],
 	},
-	wrap: { appliesTo: ['textarea'] }
+	wrap: { appliesTo: ['textarea'] },
 };
 
 Object.keys(lookup).forEach(name => {
diff --git a/src/generators/dom/visitors/Element/meta/Window.ts b/src/generators/dom/visitors/Element/meta/Window.ts
index 68df181635..22127bd9f3 100644
--- a/src/generators/dom/visitors/Element/meta/Window.ts
+++ b/src/generators/dom/visitors/Element/meta/Window.ts
@@ -11,7 +11,7 @@ const associatedEvents = {
 	outerHeight: 'resize',
 
 	scrollX: 'scroll',
-	scrollY: 'scroll'
+	scrollY: 'scroll',
 };
 
 const readonly = new Set([
@@ -19,7 +19,7 @@ const readonly = new Set([
 	'innerHeight',
 	'outerWidth',
 	'outerHeight',
-	'online'
+	'online',
 ]);
 
 export default function visitWindow(
diff --git a/src/generators/dom/visitors/IfBlock.ts b/src/generators/dom/visitors/IfBlock.ts
index dbb40b67f4..8f3700d4ef 100644
--- a/src/generators/dom/visitors/IfBlock.ts
+++ b/src/generators/dom/visitors/IfBlock.ts
@@ -27,8 +27,8 @@ function getBranches(
 			block: node._block.name,
 			hasUpdateMethod: node._block.hasUpdateMethod,
 			hasIntroMethod: node._block.hasIntroMethod,
-			hasOutroMethod: node._block.hasOutroMethod
-		}
+			hasOutroMethod: node._block.hasOutroMethod,
+		},
 	];
 
 	visitChildren(generator, block, state, node);
@@ -43,7 +43,7 @@ function getBranches(
 			block: node.else ? node.else._block.name : null,
 			hasUpdateMethod: node.else ? node.else._block.hasUpdateMethod : false,
 			hasIntroMethod: node.else ? node.else._block.hasIntroMethod : false,
-			hasOutroMethod: node.else ? node.else._block.hasOutroMethod : false
+			hasOutroMethod: node.else ? node.else._block.hasOutroMethod : false,
 		});
 
 		if (node.else) {
diff --git a/src/generators/dom/visitors/index.ts b/src/generators/dom/visitors/index.ts
index 0b8df5ebf4..c690a2ba9c 100644
--- a/src/generators/dom/visitors/index.ts
+++ b/src/generators/dom/visitors/index.ts
@@ -13,5 +13,5 @@ export default {
 	MustacheTag,
 	RawMustacheTag,
 	Text,
-	YieldTag
+	YieldTag,
 };
diff --git a/src/generators/dom/visitors/shared/binding/getSetter.ts b/src/generators/dom/visitors/shared/binding/getSetter.ts
index 2216311b87..6aa027e5f9 100644
--- a/src/generators/dom/visitors/shared/binding/getSetter.ts
+++ b/src/generators/dom/visitors/shared/binding/getSetter.ts
@@ -7,7 +7,7 @@ export default function getSetter({
 	context,
 	attribute,
 	dependencies,
-	value
+	value,
 }) {
 	const tail = attribute.value.type === 'MemberExpression'
 		? getTailSnippet(attribute.value)
diff --git a/src/generators/server-side-rendering/index.ts b/src/generators/server-side-rendering/index.ts
index 74e3d4b9dd..d5b83f022b 100644
--- a/src/generators/server-side-rendering/index.ts
+++ b/src/generators/server-side-rendering/index.ts
@@ -43,7 +43,7 @@ export default function ssr(
 		generator,
 		contexts: new Map(),
 		indexes: new Map(),
-		conditions: []
+		conditions: [],
 	});
 
 	parsed.html.children.forEach((node: Node) => {
diff --git a/src/generators/server-side-rendering/visitors/EachBlock.ts b/src/generators/server-side-rendering/visitors/EachBlock.ts
index 5da589f185..b7de6ce9d9 100644
--- a/src/generators/server-side-rendering/visitors/EachBlock.ts
+++ b/src/generators/server-side-rendering/visitors/EachBlock.ts
@@ -29,7 +29,7 @@ export default function visitEachBlock(
 	const childBlock = block.child({
 		contexts,
 		indexes,
-		contextDependencies
+		contextDependencies,
 	});
 
 	node.children.forEach((child: Node) => {
diff --git a/src/generators/server-side-rendering/visitors/Element.ts b/src/generators/server-side-rendering/visitors/Element.ts
index a01f8eabd4..3540bd12f7 100644
--- a/src/generators/server-side-rendering/visitors/Element.ts
+++ b/src/generators/server-side-rendering/visitors/Element.ts
@@ -7,7 +7,7 @@ import Block from '../Block';
 import { Node } from '../../../interfaces';
 
 const meta = {
-	':Window': visitWindow
+	':Window': visitWindow,
 };
 
 function stringifyAttributeValue(block: Block, chunks: Node[]) {
diff --git a/src/generators/server-side-rendering/visitors/IfBlock.ts b/src/generators/server-side-rendering/visitors/IfBlock.ts
index a110b08bba..6c758d6358 100644
--- a/src/generators/server-side-rendering/visitors/IfBlock.ts
+++ b/src/generators/server-side-rendering/visitors/IfBlock.ts
@@ -13,7 +13,7 @@ export default function visitIfBlock(
 	generator.append('${ ' + snippet + ' ? `');
 
 	const childBlock = block.child({
-		conditions: block.conditions.concat(snippet)
+		conditions: block.conditions.concat(snippet),
 	});
 
 	node.children.forEach((child: Node) => {
diff --git a/src/generators/server-side-rendering/visitors/index.ts b/src/generators/server-side-rendering/visitors/index.ts
index cf905ad41b..57dc4a7571 100644
--- a/src/generators/server-side-rendering/visitors/index.ts
+++ b/src/generators/server-side-rendering/visitors/index.ts
@@ -15,5 +15,5 @@ export default {
 	MustacheTag,
 	RawMustacheTag,
 	Text,
-	YieldTag
+	YieldTag,
 };
diff --git a/src/generators/shared/utils/getGlobals.ts b/src/generators/shared/utils/getGlobals.ts
index f79e002471..1c00a08f60 100644
--- a/src/generators/shared/utils/getGlobals.ts
+++ b/src/generators/shared/utils/getGlobals.ts
@@ -23,7 +23,7 @@ export default function getGlobals(imports: Declaration[], options: Options) {
 			} else {
 				const warning = {
 					message: `No name was supplied for imported module '${x.source
-						.value}'. Guessing '${x.name}', but you should use options.globals`
+						.value}'. Guessing '${x.name}', but you should use options.globals`,
 				};
 
 				if (onwarn) {
diff --git a/src/index.ts b/src/index.ts
index c392f5217d..5c9d98992f 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -26,7 +26,7 @@ function normalizeOptions(options: CompileOptions): CompileOptions {
 
 			onerror: (error: Error) => {
 				throw error;
-			}
+			},
 		},
 		options
 	);
diff --git a/src/parse/index.ts b/src/parse/index.ts
index c3ae27c3e4..9962e38209 100644
--- a/src/parse/index.ts
+++ b/src/parse/index.ts
@@ -51,7 +51,7 @@ export class Parser {
 			start: null,
 			end: null,
 			type: 'Fragment',
-			children: []
+			children: [],
 		};
 
 		this.css = null;
@@ -197,6 +197,6 @@ export default function parse(
 		hash: hash(parser.template),
 		html: parser.html,
 		css: parser.css,
-		js: parser.js
+		js: parser.js,
 	};
 }
diff --git a/src/parse/read/directives.ts b/src/parse/read/directives.ts
index b318e5ac2e..ad563df8c1 100644
--- a/src/parse/read/directives.ts
+++ b/src/parse/read/directives.ts
@@ -60,7 +60,7 @@ export function readEventHandlerDirective(
 		end: parser.index,
 		type: 'EventHandler',
 		name,
-		expression
+		expression,
 	};
 }
 
@@ -114,7 +114,7 @@ export function readBindingDirective(
 			type: 'Identifier',
 			start: start + 5,
 			end: parser.index,
-			name
+			name,
 		};
 	}
 
@@ -123,7 +123,7 @@ export function readBindingDirective(
 		end: parser.index,
 		type: 'Binding',
 		name,
-		value
+		value,
 	};
 }
 
@@ -154,6 +154,6 @@ export function readTransitionDirective(
 		name,
 		intro: type === 'in' || type === 'transition',
 		outro: type === 'out' || type === 'transition',
-		expression
+		expression,
 	};
 }
diff --git a/src/parse/read/expression.ts b/src/parse/read/expression.ts
index 6e40f004f9..47e1d706df 100644
--- a/src/parse/read/expression.ts
+++ b/src/parse/read/expression.ts
@@ -16,7 +16,7 @@ export default function readExpression(parser: Parser) {
 				start,
 				end,
 				value: literals.get(name),
-				raw: name
+				raw: name,
 			};
 		}
 
@@ -24,7 +24,7 @@ export default function readExpression(parser: Parser) {
 			type: 'Identifier',
 			start,
 			end: start + name.length,
-			name
+			name,
 		};
 	}
 
@@ -32,7 +32,7 @@ export default function readExpression(parser: Parser) {
 
 	try {
 		const node = parseExpressionAt(parser.template, parser.index, {
-			preserveParens: true
+			preserveParens: true,
 		});
 		parser.index = node.end;
 
diff --git a/src/parse/read/script.ts b/src/parse/read/script.ts
index 3f56229c2b..c5a5f10b76 100644
--- a/src/parse/read/script.ts
+++ b/src/parse/read/script.ts
@@ -19,7 +19,7 @@ export default function readScript(parser: Parser, start: number, attributes) {
 	try {
 		ast = parse(source, {
 			ecmaVersion: 8,
-			sourceType: 'module'
+			sourceType: 'module',
 		});
 	} catch (err) {
 		parser.acornError(err);
@@ -32,6 +32,6 @@ export default function readScript(parser: Parser, start: number, attributes) {
 		start,
 		end: parser.index,
 		attributes,
-		content: ast
+		content: ast,
 	};
 }
diff --git a/src/parse/read/style.ts b/src/parse/read/style.ts
index 13696642a9..d1882d67df 100644
--- a/src/parse/read/style.ts
+++ b/src/parse/read/style.ts
@@ -12,7 +12,7 @@ export default function readStyle(parser: Parser, start: number, attributes) {
 	try {
 		ast = parse(styles, {
 			positions: true,
-			offset: contentStart
+			offset: contentStart,
 		});
 	} catch (err) {
 		if (err.name === 'CssSyntaxError') {
@@ -42,7 +42,7 @@ export default function readStyle(parser: Parser, start: number, attributes) {
 		content: {
 			start: contentStart,
 			end: contentEnd,
-			styles
-		}
+			styles,
+		},
 	};
 }
diff --git a/src/parse/state/mustache.ts b/src/parse/state/mustache.ts
index 88bfc401f7..716f20d288 100644
--- a/src/parse/state/mustache.ts
+++ b/src/parse/state/mustache.ts
@@ -105,9 +105,9 @@ export default function mustache(parser: Parser) {
 					type: 'IfBlock',
 					elseif: true,
 					expression,
-					children: []
-				}
-			]
+					children: [],
+				},
+			],
 		};
 
 		parser.stack.push(block.else.children[0]);
@@ -126,7 +126,7 @@ export default function mustache(parser: Parser) {
 			start: parser.index,
 			end: null,
 			type: 'ElseBlock',
-			children: []
+			children: [],
 		};
 
 		parser.stack.push(block.else);
@@ -151,7 +151,7 @@ export default function mustache(parser: Parser) {
 			end: null,
 			type,
 			expression,
-			children: []
+			children: [],
 		};
 
 		parser.allowWhitespace();
@@ -192,7 +192,7 @@ export default function mustache(parser: Parser) {
 		parser.current().children.push({
 			start,
 			end: parser.index,
-			type: 'YieldTag'
+			type: 'YieldTag',
 		});
 	} else if (parser.eat('{')) {
 		// {{{raw}}} mustache
@@ -205,7 +205,7 @@ export default function mustache(parser: Parser) {
 			start,
 			end: parser.index,
 			type: 'RawMustacheTag',
-			expression
+			expression,
 		});
 	} else {
 		const expression = readExpression(parser);
@@ -217,7 +217,7 @@ export default function mustache(parser: Parser) {
 			start,
 			end: parser.index,
 			type: 'MustacheTag',
-			expression
+			expression,
 		});
 	}
 
diff --git a/src/parse/state/tag.ts b/src/parse/state/tag.ts
index ec5aaca638..b40e3ad3fa 100644
--- a/src/parse/state/tag.ts
+++ b/src/parse/state/tag.ts
@@ -4,7 +4,7 @@ import readStyle from '../read/style';
 import {
 	readEventHandlerDirective,
 	readBindingDirective,
-	readTransitionDirective
+	readTransitionDirective,
 } from '../read/directives';
 import { trimStart, trimEnd } from '../../utils/trim';
 import { decodeCharacterReferences } from '../utils/html';
@@ -17,7 +17,7 @@ const validTagName = /^\!?[a-zA-Z]{1,}:?[a-zA-Z0-9\-]*/;
 const SELF = ':Self';
 
 const metaTags = {
-	':Window': true
+	':Window': true,
 };
 
 const specials = new Map([
@@ -25,16 +25,16 @@ const specials = new Map([
 		'script',
 		{
 			read: readScript,
-			property: 'js'
-		}
+			property: 'js',
+		},
 	],
 	[
 		'style',
 		{
 			read: readStyle,
-			property: 'css'
-		}
-	]
+			property: 'css',
+		},
+	],
 ]);
 
 // based on http://developers.whatwg.org/syntax.html#syntax-tag-omission
@@ -48,7 +48,7 @@ const disallowedContents = new Map([
 			'address article aside blockquote div dl fieldset footer form h1 h2 h3 h4 h5 h6 header hgroup hr main menu nav ol p pre section table ul'.split(
 				' '
 			)
-		)
+		),
 	],
 	['rt', new Set(['rt', 'rp'])],
 	['rp', new Set(['rt', 'rp'])],
@@ -59,7 +59,7 @@ const disallowedContents = new Map([
 	['tfoot', new Set(['tbody'])],
 	['tr', new Set(['tr', 'tbody'])],
 	['td', new Set(['td', 'th', 'tr'])],
-	['th', new Set(['td', 'th', 'tr'])]
+	['th', new Set(['td', 'th', 'tr'])],
 ]);
 
 function stripWhitespace(element) {
@@ -92,7 +92,7 @@ export default function tag(parser: Parser) {
 			start,
 			end: parser.index,
 			type: 'Comment',
-			data
+			data,
 		});
 
 		return null;
@@ -198,7 +198,7 @@ export default function tag(parser: Parser) {
 		type: 'Element',
 		name,
 		attributes,
-		children: []
+		children: [],
 	};
 
 	parser.current().children.push(element);
@@ -291,7 +291,7 @@ function readAttribute(parser: Parser, uniqueNames) {
 			start,
 			end: parser.index,
 			type: 'Ref',
-			name: name.slice(4)
+			name: name.slice(4),
 		};
 	}
 
@@ -320,7 +320,7 @@ function readAttribute(parser: Parser, uniqueNames) {
 		end: parser.index,
 		type: 'Attribute',
 		name,
-		value
+		value,
 	};
 }
 
@@ -351,9 +351,9 @@ function getShorthandValue(start: number, name: string) {
 				type: 'Identifier',
 				start,
 				end,
-				name
-			}
-		}
+				name,
+			},
+		},
 	];
 }
 
@@ -362,7 +362,7 @@ function readSequence(parser: Parser, done: () => boolean) {
 		start: parser.index,
 		end: null,
 		type: 'Text',
-		data: ''
+		data: '',
 	};
 
 	const chunks = [];
@@ -397,14 +397,14 @@ function readSequence(parser: Parser, done: () => boolean) {
 				start: index,
 				end: parser.index,
 				type: 'MustacheTag',
-				expression
+				expression,
 			});
 
 			currentChunk = {
 				start: parser.index,
 				end: null,
 				type: 'Text',
-				data: ''
+				data: '',
 			};
 		} else {
 			currentChunk.data += parser.template[parser.index++];
diff --git a/src/parse/state/text.ts b/src/parse/state/text.ts
index a59e00e15f..0f85040c21 100644
--- a/src/parse/state/text.ts
+++ b/src/parse/state/text.ts
@@ -18,7 +18,7 @@ export default function text(parser: Parser) {
 		start,
 		end: parser.index,
 		type: 'Text',
-		data: decodeCharacterReferences(data)
+		data: decodeCharacterReferences(data),
 	});
 
 	return null;
diff --git a/src/parse/utils/entities.ts b/src/parse/utils/entities.ts
index 7b43ced2c1..91689c5f30 100644
--- a/src/parse/utils/entities.ts
+++ b/src/parse/utils/entities.ts
@@ -2030,5 +2030,5 @@ export default {
 	sc: 8827,
 	wp: 8472,
 	wr: 8768,
-	xi: 958
+	xi: 958,
 };
diff --git a/src/parse/utils/html.ts b/src/parse/utils/html.ts
index 3b26f3bc73..dd4296a8d0 100644
--- a/src/parse/utils/html.ts
+++ b/src/parse/utils/html.ts
@@ -32,7 +32,7 @@ const windows1252 = [
 	339,
 	157,
 	382,
-	376
+	376,
 ];
 const entityPattern = new RegExp(
 	`&(#?(?:x[\\w\\d]+|\\d+|${Object.keys(htmlEntities).join('|')}));?`,
diff --git a/src/utils/annotateWithScopes.ts b/src/utils/annotateWithScopes.ts
index 323523188e..ab6e83d6b1 100644
--- a/src/utils/annotateWithScopes.ts
+++ b/src/utils/annotateWithScopes.ts
@@ -32,7 +32,7 @@ export default function annotateWithScopes(expression: Node) {
 			if (node._scope) {
 				scope = scope.parent;
 			}
-		}
+		},
 	});
 
 	return scope;
@@ -99,5 +99,5 @@ const extractors = {
 
 	AssignmentPattern(names: string[], param: Node) {
 		extractors[param.left.type](names, param.left);
-	}
+	},
 };
diff --git a/src/utils/globalWhitelist.ts b/src/utils/globalWhitelist.ts
index 9a684a4552..1c248bda1f 100644
--- a/src/utils/globalWhitelist.ts
+++ b/src/utils/globalWhitelist.ts
@@ -22,5 +22,5 @@ export default new Set([
 	'RegExp',
 	'Set',
 	'String',
-	'undefined'
+	'undefined',
 ]);
diff --git a/src/utils/namespaces.ts b/src/utils/namespaces.ts
index 975f01a4d1..dc5cee2752 100644
--- a/src/utils/namespaces.ts
+++ b/src/utils/namespaces.ts
@@ -17,7 +17,7 @@ export const validNamespaces = [
 	svg,
 	xlink,
 	xml,
-	xmlns
+	xmlns,
 ];
 
 export default { html, mathml, svg, xlink, xml, xmlns };
diff --git a/src/utils/removeNode.ts b/src/utils/removeNode.ts
index 3d237399a6..bce5984a98 100644
--- a/src/utils/removeNode.ts
+++ b/src/utils/removeNode.ts
@@ -2,12 +2,12 @@ import { Node } from '../interfaces';
 
 const keys = {
 	ObjectExpression: 'properties',
-	Program: 'body'
+	Program: 'body',
 };
 
 const offsets = {
 	ObjectExpression: [1, -1],
-	Program: [0, 0]
+	Program: [0, 0],
 };
 
 export function removeNode(code, parent: Node, node: Node) {
diff --git a/src/utils/reservedNames.ts b/src/utils/reservedNames.ts
index a5ecd09fbd..1e5b28740e 100644
--- a/src/utils/reservedNames.ts
+++ b/src/utils/reservedNames.ts
@@ -46,7 +46,7 @@ const reservedNames = new Set([
 	'void',
 	'while',
 	'with',
-	'yield'
+	'yield',
 ]);
 
 // prevent e.g. `{{#each states as state}}` breaking
diff --git a/src/validate/html/validateWindow.ts b/src/validate/html/validateWindow.ts
index 8889b849ff..7c78b7f37d 100644
--- a/src/validate/html/validateWindow.ts
+++ b/src/validate/html/validateWindow.ts
@@ -11,7 +11,7 @@ const validBindings = [
 	'outerWidth',
 	'outerHeight',
 	'scrollX',
-	'scrollY'
+	'scrollY',
 ];
 
 export default function validateWindow(validator: Validator, node: Node) {
diff --git a/src/validate/index.ts b/src/validate/index.ts
index 07338c9327..5e9dba604c 100644
--- a/src/validate/index.ts
+++ b/src/validate/index.ts
@@ -64,7 +64,7 @@ export class Validator {
 			loc: { line: line + 1, column },
 			pos,
 			filename: this.filename,
-			toString: () => `${message} (${line + 1}:${column})\n${frame}`
+			toString: () => `${message} (${line + 1}:${column})\n${frame}`,
 		});
 	}
 }
@@ -87,14 +87,14 @@ export default function validate(
 			onwarn({
 				message,
 				filename,
-				toString: () => message
+				toString: () => message,
 			});
 		}
 
 		const validator = new Validator(parsed, source, {
 			onwarn,
 			name,
-			filename
+			filename,
 		});
 
 		if (parsed.js) {
diff --git a/src/validate/js/propValidators/computed.ts b/src/validate/js/propValidators/computed.ts
index ec0156bd99..7456963e90 100644
--- a/src/validate/js/propValidators/computed.ts
+++ b/src/validate/js/propValidators/computed.ts
@@ -5,7 +5,7 @@ import { Node } from '../../../interfaces';
 
 const isFunctionExpression = new Set([
 	'FunctionExpression',
-	'ArrowFunctionExpression'
+	'ArrowFunctionExpression',
 ]);
 
 export default function computed(validator: Validator, prop: Node) {
diff --git a/src/validate/js/propValidators/helpers.ts b/src/validate/js/propValidators/helpers.ts
index 6dfc02013f..d5d51c99ea 100644
--- a/src/validate/js/propValidators/helpers.ts
+++ b/src/validate/js/propValidators/helpers.ts
@@ -57,7 +57,7 @@ export default function helpers(validator: Validator, prop: Node) {
 				if (/^Function/.test(node.type)) {
 					lexicalDepth -= 1;
 				}
-			}
+			},
 		});
 
 		if (prop.value.params.length === 0 && !usesArguments) {
diff --git a/src/validate/js/propValidators/index.ts b/src/validate/js/propValidators/index.ts
index e2e446407a..6d3b089d99 100644
--- a/src/validate/js/propValidators/index.ts
+++ b/src/validate/js/propValidators/index.ts
@@ -23,5 +23,5 @@ export default {
 	components,
 	events,
 	namespace,
-	transitions
+	transitions,
 };
diff --git a/src/validate/js/utils/usesThisOrArguments.ts b/src/validate/js/utils/usesThisOrArguments.ts
index a9c181a67d..958594a9eb 100644
--- a/src/validate/js/utils/usesThisOrArguments.ts
+++ b/src/validate/js/utils/usesThisOrArguments.ts
@@ -26,7 +26,7 @@ export default function usesThisOrArguments(node: Node) {
 			) {
 				result = true;
 			}
-		}
+		},
 	});
 
 	return result;
diff --git a/src/validate/utils/FuzzySet.ts b/src/validate/utils/FuzzySet.ts
index 2d7ae95d23..1973d3ff83 100644
--- a/src/validate/utils/FuzzySet.ts
+++ b/src/validate/utils/FuzzySet.ts
@@ -179,7 +179,7 @@ export default function FuzzySet(
 			matchScore = matches[matchIndex];
 			results.push([
 				matchScore / (vectorNormal * items[matchIndex][0]),
-				items[matchIndex][1]
+				items[matchIndex][1],
 			]);
 		}
 		function sortDescending(a, b) {
@@ -200,7 +200,7 @@ export default function FuzzySet(
 			for (let i = 0; i < endIndex; ++i) {
 				newResults.push([
 					_distance(results[i][1], normalizedValue),
-					results[i][1]
+					results[i][1],
 				]);
 			}
 			results = newResults;