卡在 "Expected an assignment or function: no-unused expressions"

Question

我真的快疯了，希望有人能帮我解决这个问题。我的模型中有以下代码：

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

这会在我的检查器中发送以下警告

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

所以我尝试了以下方法：

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

但是，奇怪的是，这仍然是 return 相同的警告。

有人可以解释为什么会出现此警告以及我应该如何解决这个问题吗？我想要一个没有警告的网络应用程序。

更新：我清理了我的代码，让那些不在项目中的人更容易理解它。这是相互反应的两个成分。对于从查询中获得的每个项目，我转到模型中的 fromJSON 方法。我将 returned 值推入我的结果数组和 return 该数组。

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

已更新 2

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 !== undefined ? json.nisCode : '')
        this.postal = (json.postal !== undefined ? json.postal : '')
        this.text = (json.text !== undefined ? json.text : '')
        this.type = (json.type,!== undefined ? json.type : '')
    }
}

Answer 2

试试这个

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 || ''
}

卡在 "Expected an assignment or function: no-unused expressions"

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

javascript

reactjs

expression

assignment-operator