如何设置条件以从 Javascript object 中删除属性？

Question

Im trying to remove the level_6 if counter,== maxCount. but it removes the level_6 on both "if" and "else".

let maxCount = 5;
let counter = 1;

this.combinations = {
  level_1: [ [0] ],
  level_2: [ [0] ],
  level_3: [ [0] ],
  level_4: [ [0] ],
  level_5: [ [0] ],
  level_6: [ [0] ]
};

app.post("/get-level", CSRFHeaderSecurity.Init, (req, res) => {
  let level = req.body.level;

  if (level === 1) {
    if (counter === maxCount) {
      counter = 1;
    } else {
      counter++;
    }
    storage.setItem("counter", counter).then(() => {
      console.log(counter);
    });
  }

  if (counter === maxCount) {
    res.send(
      JSON.stringify({
        level: this.combinations[`level_${level}`]
      })
    );
  } else {
    delete this.combinations.level_6;
    res.send(
      JSON.stringify({
        level: this.combinations[`level_${level}`]
      })
    );
  }
});

I expect to get 5 combinations/levels if the counter is equal to 5, but if the counter is not equal to 5 i want the combonations/levels to remain 6

Answer 1

Your logic has an issue. level_6 get's deleted on level_1 if the counter reached the value of maxCount . This code block is the culprit:

if (level === 1) {
if (counter === maxCount) {
  counter = 1;
} else {
  counter++;
}