Fix ESLint dev setup and errors

package.json

@@ -7,8 +7,7 @@
     "test": "npm run format && npm run lint && npm run test:unit",
     "test:unit": "jest",
     "format": "prettier --write --list-different './src/**/*.js'",
-    "lint": "eslint --fix './src/**/*.js'",
-    "precommit": "lint-staged"
+    "lint": "eslint './src/**/*.js'"
   },
   "main": "src/Animated.js",
   "types": "react-native-reanimated.d.ts",
@@ -39,21 +38,35 @@
   "homepage": "https://github.com/kmagiera/react-native-reanimated#readme",
   "dependencies": {},
   "devDependencies": {
+    "@react-native-community/eslint-config": "^0.0.5",
     "@types/react": "^16.9.0",
-    "@types/react-native": "^0.61.0",
+    "@types/react-native": "0.60.19",
+    "babel-eslint": "^10.0.3",
     "babel-jest": "^24.9.0",
-    "husky": "^0.14.3",
+    "eslint": "^6.5.1",
+    "eslint-config-prettier": "^6.4.0",
+    "eslint-config-standard": "^14.1.0",
+    "eslint-plugin-import": "^2.18.2",
+    "eslint-plugin-node": "^10.0.0",
+    "eslint-plugin-promise": "^4.2.1",
+    "eslint-plugin-standard": "^4.0.1",
+    "husky": "^3.0.9",
     "jest": "^24.9.0",
-    "lint-staged": "^8.0.0-beta.1",
+    "lint-staged": "^9.4.2",
     "prettier": "^1.13.7",
     "react": "^16.9.0",
     "react-native": "^0.61.0",
     "react-test-renderer": "16.9.0"
   },
   "lint-staged": {
     "*.js": [
-      "prettier --write",
+      "eslint",
       "git add"
     ]
+  },
+  "husky": {
+    "hooks": {
+      "pre-commit": "lint-staged"
+    }
   }
 }

src/Animated.test.js

@@ -25,12 +25,15 @@ describe('Reanimated backward compatible API', () => {
         this.transX = new Value(0);
         this.anim = animation.node(this.transX, animation.config);
       }
+
       start(method) {
         this.anim.start(method);
       }
+
       stop(res) {
         this.anim.__stopImmediately_testOnly(res);
       }
+
       render() {
         return (
           <Animated.View style={{ transform: [{ translateX: this.transX }] }} />
@@ -118,12 +121,15 @@ describe('Reanimated backward compatible API', () => {
         this.anim = timing(this.transX, config);
         this.anim2 = timing(this.transX, config);
       }
+
       start1(method) {
         this.anim.start(method);
       }
+
       start2(method) {
         this.anim2.start(method);
       }
+
       render() {
         return (
           <Animated.View style={{ transform: [{ translateX: this.transX }] }} />

src/Transitioning.js

@@ -44,6 +44,7 @@ class In extends React.Component {
   componentDidMount() {
     this.props.context.push(configFromProps('in', this.props));
   }
+
   render() {
     return this.props.children || null;
   }
@@ -53,6 +54,7 @@ class Change extends React.Component {
   componentDidMount() {
     this.props.context.push(configFromProps('change', this.props));
   }
+
   render() {
     return this.props.children || null;
   }
@@ -62,6 +64,7 @@ class Out extends React.Component {
   componentDidMount() {
     this.props.context.push(configFromProps('out', this.props));
   }
+
   render() {
     return this.props.children || null;
   }
@@ -74,6 +77,7 @@ class Together extends React.Component {
     config.transitions = this.transitions;
     this.props.context.push(config);
   }
+
   render() {
     return (
       <TransitioningContext.Provider value={this.transitions}>
@@ -91,6 +95,7 @@ class Sequence extends React.Component {
     config.transitions = this.transitions;
     this.props.context.push(config);
   }
+
   render() {
     return (
       <TransitioningContext.Provider value={this.transitions}>

src/animations/DecayAnimation.js

@@ -36,6 +36,7 @@ class DecayAnimation extends Animation {
   stop() {
     // not implemented yet
   }
+
   static getDefaultState() {
     return {
       position: new AnimatedValue(0),

src/animations/SpringAnimation.js

@@ -109,6 +109,7 @@ export default class SpringAnimation extends Animation {
   stop() {
     // this._finished && this._finished.setValue(1);
   }
+
   static getDefaultState() {
     return {
       position: new AnimatedValue(0),

src/animations/SpringUtils.js

@@ -105,9 +105,9 @@ function fromBouncinessAndSpeedNodes(bounciness, speed, rest) {
 
   let b = normalize(divide(bounciness, 1.7), 0, 20);
   b = projectNormal(b, 0, 0.8);
-  let s = normalize(divide(speed, 1.7), 0, 20);
-  let bouncyTension = projectNormal(s, 0.5, 200);
-  let bouncyFriction = quadraticOutInterpolation(
+  const s = normalize(divide(speed, 1.7), 0, 20);
+  const bouncyTension = projectNormal(s, 0.5, 200);
+  const bouncyFriction = quadraticOutInterpolation(
     b,
     b3Nobounce(bouncyTension),
     0.01

src/animations/TimingAnimation.js

@@ -48,6 +48,7 @@ export default class TimingAnimation extends Animation {
   stop() {
     // this._finished && this._finished.setValue(1);
   }
+
   static getDefaultState() {
     return {
       position: new AnimatedValue(0),

src/animations/backwardCompatibleAnimWrapper.js

@@ -8,7 +8,7 @@ import {
   startClock,
   stopClock,
 } from '../base';
-import { default as Clock } from '../core/AnimatedClock';
+import { clock as Clock } from '../core/AnimatedClock';
 import { evaluateOnce } from '../derived/evaluateOnce';
 
 function createOldAnimationObject(node, AnimationClass, value, config) {

src/core/AnimatedFunction.js

@@ -28,6 +28,7 @@ export function createAnimatedFunction(cb) {
   for (let i = 0; i < params.length; i++) {
     params[i] = createAnimatedParam();
   }
+  // eslint-disable-next-line standard/no-callback-literal
   const what = cb(...params);
   const func = new AnimatedFunction(what, ...params);
   return (...args) => {

src/core/InternalAnimatedValue.js

@@ -11,7 +11,7 @@ function sanitizeValue(value) {
 const CONSTANT_VALUES = new Map();
 
 function initializeConstantValues() {
-  if (CONSTANT_VALUES.size != 0) {
+  if (CONSTANT_VALUES.size !== 0) {
     return;
   }
   [0, -1, 1, -2, 2].forEach(v =>

src/core/createEventObjectProxyPolyfill.js

@@ -34,7 +34,7 @@ export default function createEventObjectProxyPolyfill() {
     contentInset: { right: {}, top: {}, left: {}, bottom: {} },
   };
   const traverse = obj => {
-    for (let key in obj) {
+    for (const key in obj) {
       obj[key].__isProxy = true;
       traverse(obj[key]);
     }