const regex = /(?<=^|[\n;](?:[\t ]*(?:\w+ )?)?)export\s*(?<modifiers>(?:\s*declare|\s*abstract|\s*async)+)?\s*(?<declaration>class|const +enum|const|enum|function\*?|interface|let|namespace|type(?! *\{)|var)\s+(?<exports>(?:[$_\p{ID_Start}][$\u200C\u200D\p{ID_Continue}]*(?=[\s=:;/({])(?!.*?,))|(?:[\w\t\n\r .,:$'"=-]+)|(?:[{[][\w\t\n\r .,:$'"-]+[}\]]))(?:\s*=\s*[$_\p{ID_Start}][$\u200C\u200D\p{ID_Continue}]*)?/gu;
// Alternative syntax using RegExp constructor
// const regex = new RegExp('(?<=^|[\\n;](?:[\\t ]*(?:\\w+ )?)?)export\\s*(?<modifiers>(?:\\s*declare|\\s*abstract|\\s*async)+)?\\s*(?<declaration>class|const +enum|const|enum|function\\*?|interface|let|namespace|type(?! *\\{)|var)\\s+(?<exports>(?:[$_\\p{ID_Start}][$\\u200C\\u200D\\p{ID_Continue}]*(?=[\\s=:;\/({])(?!.*?,))|(?:[\\w\\t\\n\\r .,:$\'"=-]+)|(?:[{[][\\w\\t\\n\\r .,:$\'"-]+[}\\]]))(?:\\s*=\\s*[$_\\p{ID_Start}][$\\u200C\\u200D\\p{ID_Continue}]*)?', 'gu')
const str = `export const CJS_SYNTAX_REGEX: RegExp = /pattern/gm;export const IGNORE_PATTERNS: string[] = [];
export declare const RESOLVE_EXTENSIONS: string[]
export enum Snack{}
export const enum Snack {}
export interface User {}
export class House {}
export declare abstract class House extends Building {}
export abstract class House {}
export async function run() {}
export async function* run() {}
export function foo() {}
export function* foo() {}
export const \$foo = 42
export const \$foo= 42
export namespace Foo {}
export type Foo = 'foo'
export let name1, name2/*, … */; // also var
export const name1 = 1, name2 = 2/*, … */; // also var, let
export function functionName() { /* … */ }
export class ClassName { /* … */ }
export function* generatorFunctionName() { /* … */ }
export const { name1, name2: bar } = o;
export const [ name1, name2 ] = array;
declare module 'module-name' {
export declare abstract class Building {}
export declare class House extends Building {}
}
"export const \$foo = 42"
export default async function functionName() { /* … */ }
export default function functionName() { /* … */ }
export default function* generatorName() { /* … */ }
export default async function* generatorNameAsync() { /* … */ }
export default class ClassName { /* … */ }
export default abstract class ClassName { /* … */ }
export default function () { /* … */ }
export default async function () { /* … */ }
export default function* () { /* … */ }
export default async function* () { /* … */ }
export default class { /* … */ }
export default async () => {}
export default async arg => {}
export default () => {}
export default arg => {}
export default (arg) => {}
export default foo
export default foo;
export default 1 + 1;
// export const CJS_SYNTAX_REGEX
/**
* Resolvable file extensions.
*
* @example
* export const CJS_SYNTAX_REGEX
*/
export type Foo = 'foo'`;
// Reset `lastIndex` if this regex is defined globally
// regex.lastIndex = 0;
let m;
while ((m = regex.exec(str)) !== null) {
// This is necessary to avoid infinite loops with zero-width matches
if (m.index === regex.lastIndex) {
regex.lastIndex++;
}
// The result can be accessed through the `m`-variable.
m.forEach((match, groupIndex) => {
console.log(`Found match, group ${groupIndex}: ${match}`);
});
}
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for JavaScript, please visit: https://developer.mozilla.org/en/docs/Web/JavaScript/Guide/Regular_Expressions