Method parseImportDeclaration

src/parser.ts:3424–3473

()

    }

    parseImportDeclaration(): Node.ImportDeclaration {
        if (this.context.inFunctionBody) {
            this.throwError(Messages.IllegalImportDeclaration);
        }

        const node = this.createNode();
        this.expectKeyword('import');

        let src: Node.Literal;
        let specifiers: Node.ImportDeclarationSpecifier[] = [];
        if (this.lookahead.type === Token.StringLiteral) {
            // import 'foo';
            src = this.parseModuleSpecifier();
        } else {
            if (this.match('{')) {
                // import {bar}
                specifiers = specifiers.concat(this.parseNamedImports());
            } else if (this.match('*')) {
                // import * as foo
                specifiers.push(this.parseImportNamespaceSpecifier());
            } else if (this.isIdentifierName(this.lookahead) && !this.matchKeyword('default')) {
                // import foo
                specifiers.push(this.parseImportDefaultSpecifier());
                if (this.match(',')) {
                    this.nextToken();
                    if (this.match('*')) {
                        // import foo, * as foo
                        specifiers.push(this.parseImportNamespaceSpecifier());
                    } else if (this.match('{')) {
                        // import foo, {bar}
                        specifiers = specifiers.concat(this.parseNamedImports());
                    } else {
                        this.throwUnexpectedToken(this.lookahead);
                    }
                }
            } else {
                this.throwUnexpectedToken(this.nextToken());
            }

            if (!this.matchContextualKeyword('from')) {
                const message = this.lookahead.value ? Messages.UnexpectedToken : Messages.MissingFromClause;
                this.throwError(message, this.lookahead.value);
            }
            this.nextToken();
            src = this.parseModuleSpecifier();
        }
        this.consumeSemicolon();

        return this.finalize(node, new Node.ImportDeclaration(specifiers, src));
    }

    // https://tc39.github.io/ecma262/#sec-exports