[Vuejs]-Nodejs concatenating numbers as a string

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 })