Encountering Canvas errors while utilizing TypeScript in the most recent version of VS Code

Currently, I'm working on TypeScript Canvas code for my application and encountering an error message that says:

The type 'CanvasRenderingContext2D' does not have the property 'wrapText'.ts(2339)

This error is triggered by this line of code:

CanvasRenderingContext2D.prototype.wrapText = function(text, x, y, maxWidth, lineHeight)

I am considering including a declaration in the lib.dom.d.ts file located within the node_modules extensions section of VS Code. Is there any other way to resolve this issue? I find it peculiar that it was omitted. Currently using the April 2021 version of VS Code after upgrading recently.

typescriptdomvisual-studio-codecanvas

Answer №1

There is no evidence to support the idea that there must be an existing wrapText definition on the context, and even if it did exist, it may not be writable.

It seems that this monkey-patching pattern is introducing a completely new property that wasn't previously present.

To me, this appears to align with TypeScript's typical behavior of checking for excess properties, ensuring that unexpected properties cannot be assigned to predefined types instances.

asserts that there is no existing implementation and follows a similar approach (in JavaScript where excess property checks are not performed, thus avoiding errors).

You can still make this optional property valid on a CanvasRenderingContext2D locally in your project without modifying any node_modules or VSCode metadata by utilizing Global Augmentation... https://www.typescriptlang.org/docs/handbook/declaration-merging.html#global-augmentation

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