JS: Cannot read properties of null (reading 'parentNode')

[kkmuffme]

https://psalm.dev/r/845866d4c7

In:

fix_button.parentNode.removeChild(fix_button);

[psalm-github-bot]

I found these snippets:

https://psalm.dev/r/845866d4c7

<?php

/**
 * @psalm-type Base = array{hello: string}
 * @psalm-type Extended = string|int
 */
class Foo {

    /**
     * @param Base $arg
     * @return Base&array{num: float|int}
     */
    public function bar( $arg ) {
		$arg['num'] = rand( 0, 100 ) * rand( 0, 100 ) / rand( 0, 100 );
        return $arg;
    }
}

Psalm output (using commit 106b986):

No issues!