承诺执行函数返回未定义

Question

当承诺解析时，我正在尝试在承诺中返回一个值，然后将返回的值传递给我的状态。但是，无论我尝试什么，我的函数的返回值...未定义。

我的函数是从 npm 包导入的，该包在此处包含其文档： https://www.npmjs.com/package/synonyms

它旨在返回给定单词的同义词。

也许我构建承诺本身的方式存在一些非常明显的问题，导致一些糟糕的异步时间？

我尝试只返回函数而不传递它来解决，但这引发了一个错误

searchForSynonymsAndDef = (param) =>{
if(this.state.scholarMode==true){
console.log("INSIDE SYNONYMS")
var synonyms = require("synonyms");
let p = new Promise((resolve,reject,param)=>{
var result=resolve(synonyms(param,"n"))
}).then((result)=>{
console.log("result is:",result)
})
.then((result)=>{
this.setState({textToReadAloud: "here are some synonyms for "
+param +"...firstly.....nouns...."+result})
console.log("here are some synonyms for "+param +"...firstly.....nouns...."+result)
})
}else{
console.log("sorry scholar mode is off")
}
}

我希望"结果"是基于传入参数的同义词，但不幸的是结果总是=未定义的:(

Answer 1

你不需要传递参数来承诺。只需从承诺中删除参数，它应该可以工作。

searchForSynonymsAndDef = (param) =>{
if(this.state.scholarMode==true){
console.log("INSIDE SYNONYMS")
var synonyms = require("synonyms");
let p = new Promise((resolve,reject)=>{
var result=resolve(synonyms(param,"n"))
}).then((result)=>{
console.log("result is:",result)
})
.then((result)=>{
this.setState({textToReadAloud: "here are some synonyms for "
+param +"...firstly.....nouns...."+result})
console.log("here are some synonyms for "+param +"...firstly.....nouns...."+result)
})
}else{
console.log("sorry scholar mode is off")
}
}

Answer 2

searchForSynonymsAndDef = (param) =>{
if(this.state.scholarMode==true){
console.log("INSIDE SYNONYMS")
var synonyms = require("synonyms");
let p = new Promise((resolve,reject,param)=>{
resolve(synonyms(param,"n"));
});
return p;
}else{
console.log("sorry scholar mode is off")
}
}