Questions tagged [ts-check]
10 questions
10
votes
3 answers
Type assert an element in a JS file with @ts-check
I have a JS file with a // @ts-check directive, using JSDoc comments to denote types.
The problem is that the elements fail type checks when retrieved from the document.
So we have in HTML:
...
When I get this element in JS the…
Keith
- 150,284
- 78
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5
votes
1 answer
How to use @ts-check in VS Code across multiple files with non-module-based website?
I'm trying to create a really simple website with:
A few JavaScript files that are directly included in the index.html
No modules / import statements
No bundling system or direct compilation step
No requirement for a server to be run (so index.html…
Joseph Humfrey
- 2,974
- 2
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3
votes
1 answer
How to use @template in function JSDoc to create coherence between param and return type?
I use @ts-check and ts linter on an ecmascript projet (I cannot use typescript but want its formalism).
All is going well except for one thing: I want to use JSDoc generics declaration so that return type is tied-to/inferred-from a parameter…
TrogloGeek
- 111
- 5
2
votes
1 answer
VS Code @ts-check in JavaScript file not checking all things - nonexistent property not erroring
// @ts-check
const obj = {
str: `a string`,
};
console.log(obj.nonexistant); // no error (it should be erroring)
let num = 0; // type number
num = obj.str; // has error (good)
Why is the first issue not showing the red underline error/problem…
700 Software
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2
votes
1 answer
How to tell JSDoc that a method returns an object containing a class type?
I have a Node.js function to create an Express server.
I've added //@ts-check to the file so that VSCode lints and type-checks everything.
What is the correct way to document this createServer function?
I want to show that it returns a Promise…
d-_-b
- 21,536
- 40
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1
vote
0 answers
Using @type for declare type of class method in JavaScript
When I use @type to declare type of class method in JavaScript with d.ts (see Type Checking JavaScript Files), the parameter types are determined incorrectly, if I use the short form of the method entry. If I use a form with function, everything…
Игорь Новожилов
- 61
- 3
0
votes
0 answers
Make "ts-check" and "jsdoc" know about types defined in an IIFE
"Exporting" a type from an old style js module.
How can I achieve ts-check and jsdoc compatibility when working with an old-style JavaScript module that selectively exports classes through this.ClassName = ClassName as shown below? We have a project…
T Ledt
- 1
- 2
0
votes
2 answers
//@ts-check and DOM element properties gives an error
I've got some simple browser-side JS code, and thought I'd try using @ts-check to pick out any fluff. Some valid bugs were found, and I've added js-doc parameter type information as well. I don't want a transpile step so this needs to be vanilla…
Roddy
- 66,617
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0
votes
0 answers
javascript variable cannot been redeclared but cannot been accesed, too
I'm a newcomer in Javascript. I have two files with js code.
file a.js contains
const words = ["Alpha", "Bita", "Gama"];
console.log(words);
file b.js contains
//@ts-check
const words = ["Alpha", "Bita", "Gama"];
console.log(words);
Both a.js and…
Lefteris
- 11
- 3
0
votes
0 answers
ES6 inherited function returns wrong type when invoked on subclass
When a function is inherited by a subclass, I want the return type to be as if the function were defined directly on the subclass.
To be clear, the code works fine at run-time. But I want to take advantage of static type-checking. I'm getting red…
phatpaul
- 166
- 7