[FIX] function-component-definition: replace var by const

Signed-off-by: Xavier Le Cunff <xavier@MacBook-Pro-de-Xavier.local>

docs/rules/function-component-definition.md

@@ -12,12 +12,12 @@ Examples of **incorrect** code for this rule:
 
 ```jsx
 // function expression for named component
-var Component = function (props) {
+const Component = function (props) {
   return <div>{props.content}</div>;
 };
 
 // arrow function for named component
-var Component = (props) => {
+const Component = (props) => {
   return <div>{props.content}</div>;
 };
 
@@ -49,11 +49,11 @@ Examples of **incorrect** code for this rule:
 ```jsx
 // only function declarations for named components
 // [2, { "namedComponents": "function-declaration" }]
-var Component = function (props) {
+const Component = function (props) {
   return <div />;
 };
 
-var Component = (props) => {
+const Component = (props) => {
   return <div />;
 };
 
@@ -63,7 +63,7 @@ function Component (props) {
   return <div />;
 };
 
-var Component = (props) => {
+const Component = (props) => {
   return <div />;
 };
 
@@ -73,7 +73,7 @@ function Component (props) {
   return <div />;
 };
 
-var Component = function (props) {
+const Component = function (props) {
   return <div />;
 };
 
@@ -107,13 +107,13 @@ function Component (props) {
 
 // only function expressions for named components
 // [2, { "namedComponents": "function-expression" }]
-var Component = function (props) {
+const Component = function (props) {
   return <div />;
 };
 
 // only arrow functions for named components
 // [2, { "namedComponents": "arrow-function" }]
-var Component = (props) => {
+const Component = (props) => {
   return <div />;
 };
 
@@ -170,11 +170,11 @@ The following patterns can **not** be autofixed in TypeScript:
 ```tsx
 // function expressions and arrow functions that have type annotations cannot be autofixed to function declarations
 // [2, { "namedComponents": "function-declaration" }]
-var Component: React.FC<Props> = function (props) {
+const Component: React.FC<Props> = function (props) {
   return <div />;
 };
 
-var Component: React.FC<Props> = (props) => {
+const Component: React.FC<Props> = (props) => {
   return <div />;
 };
 
@@ -184,7 +184,7 @@ function Component<T>(props: Props<T>) {
   return <div />;
 };
 
-var Component = function <T>(props: Props<T>) {
+const Component = function <T>(props: Props<T>) {
   return <div />;
 };
 
@@ -203,13 +203,13 @@ The following patterns can be autofixed in TypeScript:
 ```tsx
 // autofix to function expression with type annotation
 // [2, { "namedComponents": "function-expression" }]
-var Component: React.FC<Props> = (props) => {
+const Component: React.FC<Props> = (props) => {
   return <div />;
 };
 
 // autofix to arrow function with type annotation
 // [2, { "namedComponents": "function-expression" }]
-var Component: React.FC<Props> = function (props) {
+const Component: React.FC<Props> = function (props) {
   return <div />;
 };
 
@@ -219,7 +219,7 @@ function Component<T extends {}>(props: Props<T>) {
   return <div />;
 }
 
-var Component = function <T extends {}>(props: Props<T>) {
+const Component = function <T extends {}>(props: Props<T>) {
   return <div />;
 };
 
@@ -229,7 +229,7 @@ function Component<T1, T2>(props: Props<T1, T2>) {
   return <div />;
 }
 
-var Component = function <T1, T2>(props: Props<T2>) {
+const Component = function <T1, T2>(props: Props<T2>) {
   return <div />;
 };
 

lib/rules/function-component-definition.js

@@ -21,8 +21,8 @@ function buildFunction(template, parts) {
 
 const NAMED_FUNCTION_TEMPLATES = {
   'function-declaration': 'function {name}{typeParams}({params}){returnType} {body}',
-  'arrow-function': 'var {name}{typeAnnotation} = {typeParams}({params}){returnType} => {body}',
-  'function-expression': 'var {name}{typeAnnotation} = function{typeParams}({params}){returnType} {body}',
+  'arrow-function': 'const {name}{typeAnnotation} = {typeParams}({params}){returnType} => {body}',
+  'function-expression': 'const {name}{typeAnnotation} = function{typeParams}({params}){returnType} {body}',
 };
 
 const UNNAMED_FUNCTION_TEMPLATES = {