Currently, I am delving into the world of TypeScript and below you can find the code that I have been working on:
const addNumbers = (a: number, b: number) => {
return a + b
}var addNumbers = function (a, b) {
return a + b;
};The index.ts file suddenly started showing an error.
Cannot redeclare block-scoped variable 'addNumbers'.ts(2451) index.js(1, 5): 'addNumbers' was also declared here.
I am utilizing Visual Studio Code for this development. Why is this error occurring?
Your error indicates that you have defined your function twice. Renaming it to a different name should resolve the issue.
My solution was to simply add export = {} at the beginning of the file.
The issue arose because TypeScript treats a file without import or export statements as a script, giving it global scope. This caused conflicts with functions in my TypeScript code overlapping with those in the generated .js file. It's interesting that the TypeScript compiler sees the function from the source .ts file as a redeclaration after compiling.
However, by including export = {} at the top of the file with no import or export statement, TypeScript recognizes it as a module and enforces block scoping.
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