The onfocus event is the opposite of the onblur event.

The onfocus event is similar to the onfocusin event. The main difference is that the onfocus event does not bubble.

Select all contents of textbox when it receives focus (JavaScript or jQuery) - Stack Overflow

Therefore, if you want to find out whether an element or its child gets the focus, you could use the onfocusin event. However, you can achieve this by using the optional useCapture parameter of the addEventListener method for the onfocus event. The addEventListener method is not supported in Internet Explorer 8 and earlier versions. Tabs Dropdowns Accordions Convert Weights Animated Buttons Side Navigation Top Navigation JS Animations Modal Boxes Progress Bars Parallax Login Form HTML Includes Google Maps Loaders Tooltips Slideshow Filter List Sort List.

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javascript - how to auto select an input field and the text in it on page load - Stack Overflow

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Example Execute a JavaScript when an input field gets focus: In JavaScript, using the addEventListener method: Example Using "onfocus" together with the "onblur" event: LEARN MORE Tabs Dropdowns Accordions Convert Weights Animated Buttons Side Navigation Top Navigation JS Animations Modal Boxes Progress Bars Parallax Login Form HTML Includes Google Maps Loaders Tooltips Slideshow Filter List Sort List.

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