如何在TypeScript中按名称从其他文件获取常量？

算力阿峰

2026-7-28

动态获取常量的可行性问题

常量文件内容

constants-ltr.ts

export const MY_CONST_1_NAME = "foo";
export const MY_CONST_2_NAME = "bar";
export const MY_CONST_3_NAME = "too";
export const MY_CONST_4_NAME = "far";

constants-rtl.ts

export const MY_CONST_1_NAME = "oof";
export const MY_CONST_2_NAME = "rab";
export const MY_CONST_3_NAME = "oot";
export const MY_CONST_4_NAME = "raf";

疑问：能否通过如下方式动态获取对应常量？

import * as LTR from './constants-ltr';
import * as RTL from './constants-rtl';

class Foo {
    
    public isRTL:boolean = false;
    public reference:1|2|3|4 = 1;

    public make():string {
        let origin = this.isRTL ? RTL:LTR;
        return origin[`MY_CONST_${this.reference}_NAME`];
    }
}