[英]Can't access object property in javascript variable
我努力争取了一段时间。 这真是奇怪。 我想访问一个对象属性,但这总是抛出错误:
TypeError:无法读取未定义的属性模板
但是我的应用程序正常工作。 如果无法访问未定义的模板,则只有通知输出
//this is my object variabel var login = {}; login.data = { checkInput : formValidation, userSchema : User, template : 'pages/users/login', } // so I add new method which I call in different files login.header = async(req, res, next) => { /// in this section function I want to read property of template but it always return undefined try { // I have some code with read databases here //some data i want to render var data = {}; res.render(this.data.template,data); // I've been also trying another way. var template = login.data.template !== undefined ? 'page/users/login' : login.data.template; res.render(login.data.template, data); // both of above always return output, but can't read template of undefined } catch(e) { throw new Error(e); } }
我一直在尝试使用没有数组功能的属性进行访问
var login = {} login.data = { template : 'admin/pages/' body : {} }; login.getViews = function(req, res, next) { // it'l throw an error res.render(this.data.template, this.data.body); // than i try with another way, it works res.render(login.data.template, login.data.body); }
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