Stuck with the "Expected an assignment or function: no-unused expressions"

Question

I'm really going crazy here and hoping someone can help me with this problem. I have the following code inside my model:

this.text = json.text ? json.text : ''

This sends the following warning in my inspector

Expected an assignment or function call and instead saw an expression no-unused-expressions

So I tried the following:

let text;
if(json.text) text = json.text
else text = ''
this.text = text

But this, strangely enough, still returns the same warning.

Can someone give me an explanation as to why this warning presents itself and what I should do to fix this? I would like to have a warning free web app.

Update: I cleaned up my code to make it more understandable for those who're not in the project. These are the two components that react with each other. For each item I get from my query, I go to the fromJSON method in my model. I push the returned value inside my results array and return that array.

Model.js

import BaseModel from './BaseModel'

export default class Model extends BaseModel {
    constructor(){
        super()
        this.nis
        this.postal
        this.text
        this.type
    }

    fromJSON(json) {
        this.nis = json.nisCode ? json.nisCode : ''
        this.postal = json.postal ? json.postal : ''
        this.text = json.text ? json.text : ''
        this.type = json.type ? json.type : ''
    }
}

Service.js

import { BaseService } from './BaseService';
import Model from '../models/Model';
import Translation from '../components/_translations/Meta';

// To get content in correct language
const lang = new Translation().getContent('lang')

export default class Service extends Service {
    async search(keyword, type = 'keyword', query) {
        // Get the results data using the Axios instance
        return this.axiosInstanceOsn.get(query).then(
            value => {
                // First and foremost, check if the call was successful
                if (value.status === 200){

                    const data = value.data
                    let results = []
                    data.forEach(element => {
                        let as = new Model()
                        as.fromJSON(element)
                        results.push(as)
                    })
                    return results
                }
            }
        )
    }
}

Answer 1

Try this

import BaseModel from './BaseModel'

export default class Model extends BaseModel {
constructor(){
    super()
    this.nis = this.nis || ''
    this.postal = this.postal || ''
    this.text = this.test || ''
    this.type = this.type || ''
}