


Background positioning origin background-origin is a newly added attribute related to the background in CSS3, which mainly changes the starting origin position of the background. CSS3 background positioning origin background-origin has three attribute values: border, padding and content. The following will introduce the background positioning origin of CSS3, background-origin, around the three attribute values.
1. The syntax of background-origin
1. The syntax of background-origin
background-origin: padding-box || border-box || content-box
2. Attribute value of background-origin
(1) padding-box: This value is the default value of background-origin, which determines the starting position of background-position. Display the background image starting from the outer edge of the padding (the inner edge of the border);
(2) border-box: This value determines the starting position of the background-position. Display the background image starting from the outer edge of the border;
(3) content-box: This value determines the starting position of the background-position to display the background image starting from the outer edge of the content (the inner edge of the padding);
2. Compatibility of background-origin
1. Compatibility of background-origin
2. Compatibility of background-origin Writing
/*Gecko*/
-moz-background-origin: padding-box || border-box || content-box; /*Webkit*/ -webkit-background-origin: padding-box || border-box || content-box; /*Presto*/ -o-background-origin: padding-box || border-box || content-box; /*W3c Standard*/ background-origin: padding-box || border-box || content-box;
3. Example of background-origin (in Google Browse (Preview effect)
1. padding-box effect
CSS code:
div {width:200px;height:200px;background:url("http://www.leemagnum.com/img/logo.jpg") no-repeat;border:20px solid rgba(0,0,0 ,0.3);padding:20px;
-webkit-background-origin: padding-box; /*This is the default position*/ }
HTML code:
Preview effect :
2. Border-box effect
CSS code:
div {width:200px;height:200px;background:url("http://www.leemagnum.com/img/logo.jpg") no-repeat;border:20px solid rgba(0,0 ,0,0.3);padding:20px;
-webkit-background-origin: border-box; }
HTML code:
3. Content-box effect
CSS code:
div {width:200px ;height:200px;background:url("http://www.leemagnum.com/img/logo.jpg") no-repeat;border:20px solid rgba(0,0,0,0.3);padding:20px; -webkit-background-origin: content-box; }
HTML code:
Preview effect:
CSS3 background positioning origin background- This is where origin is introduced to you, I hope it can be helpful to you. For more content about CSS3, please pay attention to the CSS3 updates of Menglong Station. Thank you for your long-term support of Menglong Station.

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