这个代码会起作用。

res.send({ result : { pollution : response.data.data.current.pollution } })

这是模拟rest API调用的演示代码

const express = require("express")
const axios = require('axios')
const cors = require("cors")

const app = express()
app.use(cors())

const API_URL = 'http://localhost:3001/users'

app.get("/whole-data", async (req, res) => {
    const response = await axios.get(`${API_URL}`)
    return res.send(response.data)
});

app.get("/air-quality", async (req, res) => {
    const response = await axios.get(`${API_URL}`)
    return res.send({ result : { pollution : response.data.data.current.pollution } })
});

app.listen(3000, () => { console.log("Listening on :3000") })

仅污染

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