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JavaScript Document own method: querySelector()

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The querySelector() method (when applied to the document object of the JavaScript DOM) returns first (child) element that matches specified CSSSelector.

 

It has the following syntax with the following parameters. It returns the object representing the first element that matches the specified CSSSelector, or null if no matches are found. If the selector(s) is invalid then it throws a SYNTAX_ERR exception.

 

document.querySelector(CSSSelectors)

 

Parameter

Required / Optional

Description

CSSSelectors

Required

String specifying one or more CSSSelectors. For multiple selectors, separate each one with a comma.

 


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