querySelector method Null safety

Element? querySelector (
  1. String selectors
)
override

Finds the first descendant element of this document fragment that matches the specified group of selectors.

selectors should be a string using CSS selector syntax.

var element1 = fragment.querySelector('.className');
var element2 = fragment.querySelector('#id');

For details about CSS selector syntax, see the CSS selector specification.

Implementation

Element? querySelector(String selectors) native;