javascript: Property access on null or undefined

[ttttmr]

I refer to this document
https://codeql.github.com/codeql-query-help/javascript/js-property-access-on-non-object/

I hope to find these undefined

window.name // ok
window.abc // undefined
some // undefined

window.a=1
window.a // ok

let obj = {
  k1: 1,
}
obj.k1 // ok
obj.k2 // undefined
obj.toString // ok
obj.length // undefined

let arr = []
arr.toString // ok
arr.length // ok
arr.hello // undefined

document.body // ok
document.asd // undefined

location.pathname // ok
location.path // undefined

But I didn't find anything

Is there a generic query that finds all undefined

[aibaars]

The query you refer to is for finding places where a property is accessed of something that is known to be undefined and would lead to exceptions like TypeError: Cannot read properties of undefined. For example:

let x = undefined
x.foo // not ok

The examples you provide are places where something would evaluate to undefined. There is no standard query for that, although the existing query should contain some code to identify places that are known to be undefined, you might be able to re-use that part to build your own query.