CSS User Interface
CSS 用户界面
In this chapter you will learn about the following CSS user interface properties:
resizeoutline-offset
Browser Support
The numbers in the table specify the first browser version that fully supports the property.
| Property | |||||
|---|---|---|---|---|---|
| resize | 4.0 | 79.0 | 5.0 | 4.0 | 15.0 |
| outline-offset | 4.0 | 15.0 | 5.0 | 4.0 | 9.5 |
CSS Resizing
The resize property specifies if (and how) an element should be resizable by the user.
This div element is resizable by the user!
To resize: Click and drag the bottom right corner of this div element.
The following example lets the user resize only the width of a <div> element:
The following example lets the user resize only the height of a <div> element:
The following example lets the user resize both the height and width of a <div> element:
In many browsers, <textarea> is resizable by default. Here, we have used the resize property to disable the resizability:
CSS Outline Offset
The outline-offset property adds space between an outline and the edge or border of an element.
Note: Outline differs from borders! Unlike border, the outline is drawn outside the element's border, and may overlap other content. Also, the outline is NOT a part of the element's dimensions; the element's total width and height is not affected by the width of the outline.
The following example uses the outline-offset property to add space between the border and the outline:
例子
div.ex1 {
margin: 20px;
border: 1px solid black;
outline: 4px solid red;
outline-offset: 15px;
}
div.ex2 {
margin: 10px;
border: 1px solid black;
outline: 5px dashed blue;
outline-offset: 5px;
}
亲自尝试 »
CSS User Interface Properties
The following table lists all the user interface properties:
| Property | Description |
|---|---|
| outline-offset | Adds space between an outline and the edge or border of an element |
| resize | Specifies whether or not an element is resizable by the user |
