Typescript: [ts] Duplicate function implementation

[dpindusa]

Steps to Reproduce:
1) Create 1.ts file (Code as mentioned below)
2) Create 2.ts file (Code as mentioned below)
3) Create tsconfig.json using tsc -init. (This step is not mandatory)
4) Observer red underline under the function name

VS Code Version: 1.24.0
TypeScript Version: 2.3.4
OS Version: Windows 8.1 Enterprise

Search Terms: TypeScript Visual Studio Code [ts] Duplicate function implementation

Code

//1.ts File
function test(){
    console.log("File 1 Error");
}

//2.ts File
function test(){
    console.log("File 2 Error");
}

Expected behavior:

Actual behavior:

Related Issues: #10804

[RyanCavanaugh]

These functions are in the global scope and only one of them can exist at a time.

[brikou]

In order to prevent functions to be in global scope, you can add export {}; on top (or just export this function):

// 1.ts
export {};

function test(){
    console.log("File 1 Error");
}

// 2.ts
export {};

function test(){
    console.log("File 2 Error");
}

see https://stackoverflow.com/questions/40900791/cannot-redeclare-block-scoped-variable-in-unrelated-files

[xgqfrms]

@brikou Thanks a lot!

1. global scope
2. export {}; ES module, local module scope

[pengtaoa]

good