WP_Dependencies::query() WordPress Method
The query() method of WP_Dependencies allows for a query to be run against the dependency values. This is useful for finding out which dependencies are required for a particular component. The query can be either a string or an array.
WP_Dependencies::query( string $handle, string $status = 'registered' ) #
Query the list for an item.
Parameters
- $handle
- (string)(Required)Name of the item. Should be unique. 
- $status
- (string)(Optional) Status of the item to query. - Default value: 'registered' 
Return
(bool|_WP_Dependency) Found, or object Item data.
Source
File: wp-includes/class.wp-dependencies.php
	public function query( $handle, $status = 'registered' ) {
		switch ( $status ) {
			case 'registered':
			case 'scripts': // Back compat.
				if ( isset( $this->registered[ $handle ] ) ) {
					return $this->registered[ $handle ];
				}
				return false;
			case 'enqueued':
			case 'queue': // Back compat.
				if ( in_array( $handle, $this->queue, true ) ) {
					return true;
				}
				return $this->recurse_deps( $this->queue, $handle );
			case 'to_do':
			case 'to_print': // Back compat.
				return in_array( $handle, $this->to_do, true );
			case 'done':
			case 'printed': // Back compat.
				return in_array( $handle, $this->done, true );
		}
		return false;
	}
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Changelog
| Version | Description | 
|---|---|
| 2.6.0 | Moved from WP_Scripts. | 
| 2.1.0 | Introduced. |