使用Inquirer v8.2.4时出现.then is not a function错误求助

你的问题出在两个关键API用法错误上，和Inquirer版本无关：

错误1：createPromptModule用法错误 #

Inquirer v8中，createPromptModule()方法不接受questions参数，它的作用是创建一个自定义的prompt函数。正确流程是先调用createPromptModule()得到prompt函数，再用这个函数传入questions，才会返回可调用.then()的Promise。

错误2：文件写入方法错误 #

你在writeToFile里误用了FontFaceSet.writeToFile，这是不存在的方法，应该使用已引入的fs模块的fs.writeFile。

修正后的完整代码 #

const inquirer = require("inquirer");
const fs = require("fs");
const generateMarkdown = require("./util/generateMarkdown.js");

const questions = [
    {
        type: "input",
        message: "What is your Github username?",
        name: "Username",
    },
    {
        type: "input",
        message: "What is your Email adress?",
        name: "email" 
    },
    {
        type: "input",
        message: "What is your projects name?",
        name: "project",
    },
    {
        type: "input",
        message: "Description of your project:",
        name: "description",
    },
    {
        type: "checkbox",
        message: "What license does your project require? (SPACEBAR to checkmark and ENTER to confirm)",
        name: "license",
        choices: ['MIT', 'APACHE 2.0', 'GPL 3.0', 'BSD 3', 'N/A'],
    },
    {
        type: "input",
        message: "What command should run dependencies?",
        name: "install",
    },
    {
        type: "input",
        message: "what command should be used to run tests?",
        name: "test",
    },
    {
        type: "input",
        message: "What does the user need to know about this repo?",
        name: "use",
    },
    {
        type: "input",
        message: "How does the user contribute to this repo?",
        name: "contribute",
    },
];

function writeToFile(fileName, data) {
    // 修正：使用fs.writeFile替代不存在的FontFaceSet.writeToFile
    fs.writeFile(fileName, data, function (err) {
        if (err) throw err;
        console.log("File Created");
    })
}

function init() {
    // 修正：先创建prompt模块函数，再传入questions调用
    const prompt = inquirer.createPromptModule();
    prompt(questions).then((data) => {
        const readmeFile = generateMarkdown(data);
        writeToFile("generatedReadMe.md", readmeFile);
    })
}

init();

简化写法（可选） #

如果不需要自定义prompt模块，直接用inquirer.prompt(questions)更简洁，效果完全一致：

function init() {
    inquirer.prompt(questions).then((data) => {
        const readmeFile = generateMarkdown(data);
        writeToFile("generatedReadMe.md", readmeFile);
    })
}

内容的提问来源于stack exchange，提问作者Zac0088