how to use the closesync function from the fs-extra library in typescript

To use the closesync function from the fs-extra library in TypeScript, start by installing the library using npm:

npm install --save fs-extra
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Then, import the fs-extra module into your TypeScript code:

index.ts
import * as fs from 'fs-extra';
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Assuming you have a file descriptor for the file you want to close, the closesync function can be used like so:

index.ts
const fd: number = fs.openSync('path/to/file', 'r');
fs.closeSync(fd);
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In the code above, we first open a file using openSync, which returns a file descriptor. Then, we pass that file descriptor to closeSync to close the file.

Note that closeSync is a synchronous function and will block the thread until the file is closed. If you are working with long-running operations, you should consider using the asynchronous version of the function, close, which takes a callback function.