NodeJS在模塊導出內需要一個函數嗎？

Question

我創建了一個函數來注冊帶有把手的新部分。 我不想將所有內容都塞在同一個文件中，所以我正在使用模塊導出來導出函數。

home.js-用於呈現視圖

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-注冊車把部分的功能

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);
    };
};

每當我調用“ renderHtml（）”時，都會引發錯誤，指出該函數未定義。 我該如何進行？

Answer 1

您從未返回過renderHtml方法。 嘗試這個：

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;
};