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Today, the editor will share with you the relevant knowledge points about how css3 removes the box clicked on input. The content is detailed and the logic is clear. I believe most people still know too much about this knowledge, so share this article for your reference. I hope you can get something after reading this article. Let's learn about it.

Method: 1, use the ": focus" selector to select the specified input element, the syntax is "input element: focus {css style code;}"; 2, in the css code of the selected input element, use the outline attribute to remove the outer box, the syntax is "outline:none;".

The operating environment of this tutorial: windows10 system, CSS3&&HTML5 version, Dell G3 computer.

How does css3 remove the box clicked by input?

1. You can first select the input element using the focus selector.

The focus selector is used to select elements that have focus.

The focus selector accepts keyboard events or other user input elements

2. Use the outline attribute to remove the box when you click.

Outline (outline) is a line drawn around the element, located on the periphery of the edge of the border, can play the role of highlighting the element.

The outline shorthand attribute sets all the outline properties in a declaration.

The properties that can be set are (in order): outline-color, outline-style, outline-width

When the property value is set to none, the element has no outer outline border

Examples are as follows:

123 .firstname: focus {outline:none;}

Click on the text input box form to see a yellow background:

First name:

Last name:

Note: the effect of focus on IE8,DOCTYPE must have been declared

Output result:

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