Question 194343 in Javascript Question posted in
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Javascript – the requested module does not provide export name

as shown in the code posted below. i am creating envVars to store all the system constants.in index.js i am importing EnvVars.js as shown below.
at run time, i receive the following error:

PS C:xxxxprojectsnodejshttpprocessTIFF-0> node index.js
file:///C:/xx/xx/projects/nodejs/http/processTIFF-0/index.js:3
import {envVars} from './SYS/EnvVars.js'
        ^^^^^^^
SyntaxError: The requested module './SYS/EnvVars.js' does not provide an export named 'envVars'
?[90m    at ModuleJob._instantiate (internal/modules/esm/module_job.js:104:21)?[39m
?[90m    at async ModuleJob.run (internal/modules/esm/module_job.js:149:5)?[39m
?[90m    at async Loader.import (internal/modules/esm/loader.js:166:24)?[39m
?[90m    at async Object.loadESM (internal/process/esm_loader.js:68:5)?[39m
PS C:UsersAmr.BakriprojectsnodejshttpprocessTIFF-0>

please let me know how to fix it

EnvVars.js:

export function define(name, value) {
    Object.defineProperty(exports, name, {
        value:      value,
        enumerable: true,
        writable: false
    });
}

define("END_POINT_HOST_JK","sf.tzt")
define("END_POINT_PATH_RASTER_IN_POLYGON","/xx/api/process/polygon-3857?polygon=")
define("END_POINT_PATH_RESOLUTION","&resolution=1")
define("WKT_EPSG4326","POLYGON((14.302759232915124 52.037914242476376,14.301196347357946 12.03581482424235,44.306554812125416 32.03367606317161,24.308149593306208 52.03695283888638,14.302759232915124 52.037914242476376))")

index.js:

import {envVars} from './SYS/EnvVars.js'
Tags:

2

Answers


  1. 0

    You are writing a standard JavaScript module, not a CommonJS module.

    There is no implicit exports variable scoped to the module.

    If you execute SYS/EnvVars.js directly then you would see this error:

    ReferenceError: exports is not defined in ES module scope
    This file is being treated as an ES module because it has a ‘.js’ file extension and ‘/………./package.json’ contains "type": "module". To treat it as a CommonJS script, rename it to use the ‘.cjs’ file extension.

    Define, and explicitly export, exports at the top of SYS/EnvVars.js:

    export const exports = {};

    Alternatively, for a more idiomatic approach, get rid of your define function and just export each value individually, creating the object when you import them:

    import * as exports from './SYS/EnvVars.js';

console.log(exports);

    and

    export const END_POINT_HOST_JK = 'sf.tzt';
export const END_POINT_PATH_RASTER_IN_POLYGON = '/xx/api/process/polygon-3857?polygon=';
export const END_POINT_PATH_RESOLUTION = '&resolution=1';
export const WKT_EPSG4326 =
    'POLYGON((14.302759232915124 52.037914242476376,14.301196347357946 12.03581482424235,44.306554812125416 32.03367606317161,24.308149593306208 52.03695283888638,14.302759232915124 52.037914242476376))';
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  2. 0

    Though I’m not sure why you need to do this define function gimmick, but in case you must, then do this:

    
function define(name, value) {
    Object.defineProperty(envVars, name, {
        value:      value,
        enumerable: true,
        writable: false
    });
}

// this is the actual export
export let envVars = {};

define("END_POINT_HOST_JK","sf.tzt")
define("END_POINT_PATH_RASTER_IN_POLYGON","/xx/api/process/polygon-3857?polygon=")
define("END_POINT_PATH_RESOLUTION","&resolution=1")
define("WKT_EPSG4326","POLYGON((14.302759232915124 52.037914242476376,14.301196347357946 12.03581482424235,44.306554812125416 32.03367606317161,24.308149593306208 52.03695283888638,14.302759232915124 52.037914242476376))");

    for consuming:

    
import {envVars} from './SYS/EnvVars.js'

console.log(envVars.END_POINT_HOST_JK);

    Reason your existing example was not working is because you were nowhere exporting envVars.

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