问题可能是由于在代码中重复声明标识符所致。要解决此问题,可以通过检查整个代码库,找到重复声明的标识符并将其重命名。另外,也可以使用ES6模块,以便减少标识符的冲突。
代码示例:
// 错误示例
const foo = 'hello';
const foo = 'world'; // Identifier 'foo' has already been declared
// 正确示例
const hello = 'hello';
const world = 'world';
// 错误示例
import { foo } from './bar';
import { foo } from './baz'; // Identifier 'foo' has already been declared
// 正确示例
import { foo as barFoo } from './bar';
import { foo as bazFoo } from './baz';
// 错误示例
import { foo } from './bar.js';
export const foo = 123; // Identifier 'foo' has already been declared
// 正确示例
import { foo } from './bar.js';
export const bar = 123;