Nodejs concatinating numbers as a string

This function is triggered on button click

    nextPage() {
      this.tweets = []
      this.$route.query.page += 1
      this.getTweets()
    },

what its doing is, reseting array of tweets to zero, incrementing existing query(page) by 1 and calling getTweets function

getTweets(newCurrent) {
      this.tweets = []
      const API_URL = `${this.$server}/api/twitter/tweets`

      const params = {
        token: getUserToken(),
        // THIS IS WHERE I AM PASSING QUERY
        page: this.$route.query.page,
        newCurrentPage: newCurrent,
      }
      axios.post(API_URL, null, { params }).then(res => {
        this.currentPage = res.data.page
        this.numberOfPages = res.data.numberOfPages

        res.data.tweets.forEach(tweet => {
          const tweetData = {
            id: tweet.id,
            tweet_text: tweet.tweet_text,
            twitter_name: tweet.twitter_name,
            twitter_username: tweet.twitter_username,
            added_at: moment(String(tweet.added_at)).format('MM/DD/YYYY hh:mm'),
          }
          this.tweets.push(tweetData)
        })
      })
    }

and then finally in nodejs. Here i am getting typeof number but currentPage is still concatinated, if i were on page 20 and i click next, currentPage will be 201. How to avoid this?

        var currentPage = parseInt(req.query.page)
        console.log(typeof currentPage)
        console.log(currentPage)
        
        // check if there is newCurrentPage
        if(newCurrentPage != undefined) {
            skip = (newCurrentPage - 1) * pageSize
            currentPage = newCurrentPage
        } else {
            // check if page is valid
            if(currentPage < 1) {
                currentPage = 1
            } else if(currentPage > numberOfPages) {
                currentPage = numberOfPages - 1
            }
            
            // offset
            skip = (currentPage - 1) * pageSize
        }

>Solution :

Query parameters in vue-router are always treated as string. Because it can be page=1 like it could be page=foo, there is no way to know.

So ?page=1 will be this.$route.query.page === "1"

To fix this, you’ll have to parse the parameter first:

const newPage = parseInt(this.$route.query.page, 10) + 1

Side note, assigning a new value to $router.query.page doesn’t work. You have to push a new route for it to update:

const newPage = parseInt(this.$route.query.page, 10) + 1
this.$router.push({ query: newPage })