Reactタイピング

(const {username, address, favorite} = userInfo;)

const {username, address, favorite} = userInfo;

(const profile = {...userInfo, age};)

const profile = {...userInfo, age};

(const UserArea = (props) => {return <h1>Hello, {props.username}</h1>};)

const UserArea = (props) => {return <h1>Hello, {props.username}</h1>};

(const obj = {foo: 1, [keyName]: 2, baz: baz};)

const obj = {foo: 1, [keyName]: 2, baz: baz};

(console.log(obj);)

console.log(obj);

(const [n, m] = [1, 2];)

const [n, m] = [1, 2];

(const onj = {organization: 'unrect', age: 1}; const {organization, age} = onj;)

const onj = {organization: 'unrect', age: 1}; const {organization, age} = onj;

(const onj = {organization: 'unrect', age: 1}; const {organization: group, age} = onj;)

const onj = {organization: 'unrect', age: 1}; const {organization: group, age} = onj;

(const arr1 = [1, 2, 3]; const arr2 = [...arr1, 4, 5, 6];)

const arr1 = [1, 2, 3]; const arr2 = [...arr1, 4, 5, 6];

(const obj2 = JSON.parse(JSON.stringify(obj));)

const obj2 = JSON.parse(JSON.stringify(obj));

(const organaization = "" || "UnReact";)

const organaization = "" || "UnReact";

(const organaization = 'Uniqlo' && 'Softbank' && 'Toyota' && 'UnReact';)

const organaization = 'Uniqlo' && 'Softbank' && 'Toyota' && 'UnReact';

(const organaization = null ?? "UnReact";)

const organaization = null ?? "UnReact";

(const language = undefined ?? "React";)

const language = undefined ?? "React";

(console.log(n?.employee?.age);)

console.log(n?.employee?.age);

(fetch(url).then(res => res.json()))

fetch(url).then(res => res.json())