learn-angular | Learn Angular 4 in Baby Steps | Code Editor library
kandi X-RAY | learn-angular Summary
kandi X-RAY | learn-angular Summary
We will learn Angular 4 by taking small incremental steps. But before we start with Angular 4 we will first have to learn TypeScript and Reactive Programming:. We will be using VSCode as our Editor, just open the project file in VSCode. Read the readme.md file in each project. Install VS Code Editor: For questions and discussion join:
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Top functions reviewed by kandi - BETA
- Initialize a new App component .
- Hero object .
- Class validator .
- Component component .
- Join path to root .
- Provides a new page directive .
- Represents a pair .
- Initialize an image .
- Pack a umd package .
- Pack package . json
learn-angular Key Features
learn-angular Examples and Code Snippets
Community Discussions
Trending Discussions on learn-angular
QUESTION
i am new to vuejs3
, i tried using json
with vuejs3
, i displayed the courses in view blog / index
, and when clicking on a course in an index
it redirect to details of that course clicks, in my case it gives me error: Uncaught (in promise) TypeError: Cannot read property 'title' of null
.
blog/index.vue
...ANSWER
Answered 2021-May-02 at 17:32The problem is with your blog/show.vue
file.
Notice how in your data, post
is set to null
.
When your component mounts, it attempts to read post.title
and post.content
but it fails because post
does not yet contain those properties.
The method to retrieve and set the post data is only run after the component has been mounted.
One way would be to not display the
tags until
post
data is no longer null
by using an attribute like v-if="post"
Alternatively, you can set some default values to your post by making it an object:
QUESTION
ANSWER
Answered 2020-May-13 at 09:03I see multiple issues here.
- Change the type definition from
Object
toany
. - Conventionally, dollar sign at the end of a variable is used to denote an observable. Here it doesn't denote an observable.
- Edit the code so that the asynchronous calls are streamlined. I am using RxJS
switchMap
to project the observable fromgetUser()
on receiving the parameters fromroute
. Try the following
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