JSDoc type assertions not working

[dimensi]

• VSCode Version: 1.19.2
• OS Version: Arch

Steps to Reproduce:

1. add // @ts-check
2. write jsdoc type assertion
3. alt + hover on variable

Does this issue occur when all extensions are disabled?: No

[usernamehw]

Duplicate of microsoft/TypeScript#18212 ?

In a nutshell, it is designed that way - you should add parentheses around your expression:

this.el = /** @type {HTMLImageElement} */ (el);
this.el

[dimensi]

Oh, now working. I can't find in docs about jsdoc type assertions, only in update release note https://code.visualstudio.com/updates/v1_16#_jsdoc-type-assertions. I look on code 100 times and first time notice parentheses

[mjbvz]

Closing as question / dup