app.node.tryGetContext

[greensmith]

Hello, I have been attempting to move a project to v2 and the aws-cdk-lib package.

unfortunately I've hit an issue almost immediately whereby node is no longer recognised as a property of cdk.App, this has the knock-on effect that I cannot use tryGetContext.

`#!/usr/bin/env node
import * as cdk from 'aws-cdk-lib/core';
import { MStack } from '../lib/stack';

const app = new cdk.App();
const branch = app.node.tryGetContext("branch");
const mStack = new MStack(app, 'MStack',{
branch: branch
})`

I know that the cdk-examples repository was recently updated to use v2 and they too contain tryGetContext, so, it should still work? I'm not sure what I am missing.

many thanks

[greensmith]

for anyone who might encounter the same issue, I created a new blank folder with a v2 sample app ( cdk init app --language=typescript) and there must be some conflicts in the original project as this new one works as expected.

I can only assume that the suggestion in the aws-cdk-lib readme that all we need to do is "declare aws-cdk-lib and constructs packages....then change imports" might not be quite enough, either that or I completely missed some other upgrade instructions somewhere...

[timoteialbu]

Thanks for asking this question! I just ran into this issue myself and I cannot start the project fresh. Any help from the dev team with this?

[cmorgia]

Hello @greensmith,
I noticed in the code snippet that you import as:
import * as cdk from 'aws-cdk-lib/core';

while I typically import without the core subfolder, as in:
import * as cdk from 'aws-cdk-lib';

Let me know if it helps 👍

[guledmahdi]

adding https://www.npmjs.com/package/constructs to my application resolved this.
npm i constructs

[github-actions[bot]]

Hello! Reopening this discussion to make it searchable.