如何重新链接库使用要求？ （节点）

Question

For example I have file 1

[{"a1":1}]

And file 2

var obj1 = JSON.parse(fs.readFileSync("./файл 1.JSON" , "UTF-8"));
module.exports.obj1 = obj1

I start program ...

for(i=0; ; i++) {
  console.log(require('./файл 2').a1);
  let bb = JSON.parse(fs.readFileSync("./файл 1.JSON" , "UTF-8"));
  console.log(bb.a1);
  (there pause for slowed)
}

And at that time I correct file 1 . Then I will see it in fs , but don't see in require . Now the question: how to make, so that require show the new value?

Answer 1

When node executes your program and executes a require statement, it loads any modules. It then caches those modules so that subsequent requests for the same module give the same code. So in your example, on the first time through the loop, file 2 is going to be initialized with whatever value it reads from the JSON file and it won't be re-initialized.

Modules are intended to be static bundles of code and using require to include the same module multiple times is supposed to return the same module. For dynamic values like your JSON file, use fs functions to access the values at the time they're needed.