Whether jquery gets focus

Jquery method of obtaining focus: Determine whether the object obtains focus by judging whether [$(object).is(":focus")] is equal to true, where the [:focus] selector is used to select the object that obtains focus. Element, the [is()] method is used to check whether the selected element matches the selector.

The operating environment of this tutorial: Windows 7 system, jquery version 1.10.2. This method is suitable for all brands of computers.

How jquery gets focus:

In jquery, you can judge whether $(object).is(":focus") is equal to true to determine whether the object has focus.

When the object has focus, $(object).is(":focus") will return true, otherwise it will return false.

Example:

var isFocus=$("#tRow").is(":focus");  
if(true==isFocus){  
    alert("focus");  
}else{  
    alert("blur");  
}

Description:

• is() method is used to check whether the selected element matches the selector.

• :focus The selector is used to select the element that receives focus.

Tip: Elements that receive keyboard events or other user input allow the :focus selector.

Related free learning recommendations: javascript (video)

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