如何设置对象值等于变量内的对象值

如何解决如何设置对象值等于变量内的对象值

router.get("/images",function(req,res) {
  // Sends all available images
  let sendFiles = [];
  let files = fs.readdirsync(imagePath);
  files.forEach(file => {
    if (file.includes("jpg") ||
        file.includes("jpeg") ||
        file.includes("JPEG") ||
        file.includes("png") ||
        file.includes("PNG")) {
      sendFiles.push(file)
    }
  });
  res.send({files: sendFiles});
});

在这个块中：

var myConfig = {
  elementID: "Test",cookieName: "myTest",cookieExpiresAfterDays: 1,cookieDomain: ".localhost:3000/",privacyPolicy: "",services: [
    {
      name: "GoogleAnalytics",default: !0,required: !0,onlyOnce: !0,},],translations: {
    GoogleAnalytics: {
      description: `<p>CookieDomain: ${cookieDomain}</p>`,title: "Google Analytics",}
};

我需要设置 translations: { GoogleAnalytics: { description: `<p>CookieDomain: ${cookieDomain}</p>`,} 但它返回一个错误

未捕获的引用错误：cookieDomain 未定义

当我尝试 cookieDomain: cookieDomain 时，它会打印 undefined。

如何访问正确的值？

解决方法

这里有两种解决方案

在初始化cookieDomain对象之前在同一个文件中定义myConfig变量
将 cookieDomain 值作为参数传递，因此 myConfig 对象将是

var myConfig = {
  elementID: "Test",cookieName: "myTest",cookieExpiresAfterDays: 1,cookieDomain: ".localhost:3000/",privacyPolicy: "",services: [
    {
      name: "GoogleAnalytics",default: !0,required: !0,onlyOnce: !0,},],translations: ({cookieDomain}) => {
    GoogleAnalytics: {
      description: `<p>CookieDomain: ${cookieDomain}</p>`,title: "Google Analytics",}
};

然后你需要调用 translations 块

myConfig.translations({cookieDomain: 'some value here'});

在这种情况下，您可以使用从 myConfig 变量读取的 getter：

var myConfig = {
  elementID: "Test",translations: {
    GoogleAnalytics: {
      get description(){
        return `<p>CookieDomain: ${myConfig.cookieDomain}</p>`
      },}
};

如果 myConfig 的值可能发生变化，您可以使用嵌套的惰性 getter：

var myConfig = {
  elementID: "Test",//We must use a getter here,so the outer object is available through `this`
  get translations() {
    delete this.translations
    const outerObj = this
    return this.translations = {
      GoogleAnalytics: {
        get description(){
          return `<p>CookieDomain: ${outerObj.cookieDomain}</p>`
        },}
  }
};