jquery is() method
Translation results：
is
英[ɪz] 美[ɪz]
vt.& vi. is (the third single form of be)
n .exist
jquery is() methodsyntax
Function:is() detects a set of matching elements based on a selector, element, or jQuery object, and returns true if at least one of these elements matches the given parameters.
Syntax:.is(selector)
Parameters:
| Parameter | Description |
| selector | String value, containing the selector expression of the matching element. |
Note:Unlike other filtering methods, .is() does not create a new jQuery object. Instead, it allows us to instrument the jQuery object without modifying its contents. This is often useful inside callbacks, such as event handlers.