WKUserScript

@interface WKUserScript : NSObject 

/* @abstract The script source code. */
@property (nonatomic, readonly, copy) NSString *source;

/* @abstract When the script should be injected. */
@property (nonatomic, readonly) WKUserScriptInjectionTime injectionTime;

/* @abstract Whether the script should be injected into all frames or just the main frame. */
@property (nonatomic, readonly, getter=isForMainFrameOnly) BOOL forMainFrameOnly;

/*! @abstract Returns an initialized user script that can be added to a @link WKUserContentController @/link.
 @param source The script source.
 @param injectionTime When the script should be injected.
 @param forMainFrameOnly Whether the script should be injected into all frames or just the main frame.
 */
- (instancetype)initWithSource:(NSString *)source injectionTime:(WKUserScriptInjectionTime)injectionTime forMainFrameOnly:(BOOL)forMainFrameOnly;

@end