JavaScript 环境

promise.catch(function(){...});

<ConPress={()=>this.setState({pressed:true})}/>

let greeting ='hi';

Math.max(...array);

classCextendsReact.Component{render(){return<View/>;}}

const key ='abc';const obj ={[key]:10};

const answer =42;

const{isActive, style}=this.props;

for(var num of[1,2,3]){...};

letnumber= x => x;

const b =0b11;const o =0o7;const u ='Hello\u{000A}\u{0009}!';

importReact,{Component}from'react';

const obj ={method(){return10;}};

const name ='vjeux';const obj ={name};

functiontest(x ='hello',{a, b},...args){}

function(type,...args){};

const o ={a, b, c};

const a =/o+/y;

const who ='world';const str =`Hello ${who}`;

conststring='foo💩bar';const match =string.match(/foo(.)bar/u);

let x =10**2;

asyncfunctiondoStuffAsync(){const foo =awaitdoOtherStuffAsync();};

functionf(a, b, c,){};

const extended ={...obj, a:10};

try{throw0;}catch{doSomethingWhichDoesNotCareAboutTheValueThrown();}

constpackage=awaitimport('package');package.function()

const foo = object.foo??'default';

const name = obj.user?.name;

classBork{static a ='foo';static b; x ='bar'; y;}

export v from'mod';

template(`const %%importName%% = require(%%source%%);`);

functionfoo(x:?number):string{};

exportdefault42;

<Viewstyle={{color:'red'}}/>

Object.assign(a, b);

const bar =createReactClass({});

functionfoo(x:{hello:true, target:'react native!'}):string{};