Javascript NodeJ是否需要模块导出内部的函数？

我已经创建了一个函数来注册一个带有把手的新零件。我不想把所有内容都塞进同一个文件中，所以我使用模块导出来导出函数

home.js-用于渲染视图

var fs = require('fs');
var Handlebars = require('hbs');

// Directories, Files and other Variables
var viewsDir = __dirname + '/../views';

// Function Helpers
var renderHtml = require('./helpers/render_html')(fs, viewsDir);

exports.index = function(req, res) {

    renderHtml('main', 'head');
    renderHtml('main', 'body');

    res.render('layout', {
        blogTitle: "My Website",
        blogDescription: "Hello! This is a description :)"
    });
};

render_html.js-注册把手的函数

module.exports = function(fs, viewsDir) {
    var renderHtml = function(file, section) {
        var newSection, handlebarsTemplate;

        if (typeof section === undefined) {
            newSection = "htmlBody";
        } else if (section === "body") {
            newSection = "htmlHead";
        } else if (section === "head") {
            newSection = "htmlBody";
        }

        handlebarsTemplate = fs.readFileSync(viewsDir + '/' + file + '.html', 'utf8');
        Handlebars.registerPartial(newSection, handlebarsTemplate);
    };
};

---

每当我调用“renderHtml（）”时，它都会抛出一个错误，即函数未定义。如何继续？

您从未返回您的

renderHtml

方法。试试这个：

module.exports = function(fs, viewsDir) {
    var renderHtml = function(file, section) {
        var newSection, handlebarsTemplate;
        if (typeof section === undefined) {
            newSection = "htmlBody";
        } else if (section === "body") {
            newSection = "htmlHead";
        } else if (section === "head") {
            newSection = "htmlBody";
        }
        handlebarsTemplate = fs.readFileSync(viewsDir + '/' + file + '.html', 'utf8');
        Handlebars.registerPartial(newSection, handlebarsTemplate);
    };
    return renderHtml;
};