I am encountering syntax errors with the @Page decorator and constructor () while working on the Ionic 2 template project

Recently, I created an Ionic 2 beta app, but encountered syntax errors when opening it in Visual Studio (VS) 2015. The errors were present inside all the .js files for the @Page decorator and the contructor () { }. As a newcomer to Ionic 2, pinpointing whether the error stemmed from TypeScript, Ionic, Angular, or just VS being finicky was a challenge.

To illustrate, consider this screenshot of the tabs.js file...

https://i.sstatic.net/Kzii2.png

I'm seeking insights into why these syntax errors are cropping up and any guidance on how to address them. Any assistance would be greatly appreciated!

visual-studiotypescriptionic-frameworkangularionic2

Answer №1

This answer has been updated with a more detailed explanation

Upon researching online, it became evident that the issue at hand is not so much a code-breaking problem as it is an inconvenience for developers who see these errors on their screens.

The root of the problem:

Certain characters are considered invalid for .js files in Visual Studio (and possibly other IDEs). Angular 2 and Ionic 2 reserve specific characters, like @, for special purposes. For example, using @Page informs Ionic to generate a new navigation component compatible with NavController.

A potential solution:

Ionic provides the option to create applications in JavaScript or TypeScript. If opting for JavaScript, one must tolerate these visual errors as the application will still function as intended (at least to my knowledge).

Alternatively,

One can opt for TypeScript. TypeScript allows the use of these characters, eliminating the errors. The downside is learning TypeScript, which I personally view as beneficial. To initiate a TypeScript project, simply append --ts to the CLI command, such as ionic start testApp --v2 --ts

I'm leaving this information here in case others encounter similar issues and find it helpful.

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