resize property determines how an element can be resized by the user, if at all.
You can specify whether the user can resize the element horizontally, vertically, both, or not at all.
resize property is not to be confused with the
overflow property, which allows you to specify what should happen when an element's contents are too large to fit inside the box. In this case you can specify that the box should grow scrollbars, hide the content, or that the content should not be clipped (i.e. that it should appear outside the box). However, that is not the same as the
resize property, which allows the user to resize the box.
resize property does not apply to blocks where the
overflow property is set to
visible. Given that this is the default value for that property, you will need to make sure that
overflow is set to something other than
visible (such as
- The user can't resize the element. The browser/user agent provides no mechanism to allow the user to do this.
- The user can resize both the height and width of the element.
- The user can resize the width of the element.
- The user can resize the height of the element.
In addition, all CSS properties also accept the following CSS-wide keyword values as the sole component of their property value:
- Represents the value specified as the property's initial value.
- Represents the computed value of the property on the element's parent.
- This value acts as either
initial, depending on whether the property is inherited or not. In other words, it sets all properties to their parent value if they are inheritable or to their initial value if not inheritable.
Basic Property Information
- Initial Value
- Applies To
- All elements where the
overflowproperty is not set to
Working Example within an HTML Document
resizeproperty is defined in CSS Basic User Interface Module Level 3 (CSS3 UI) (W3C Candidate Recommendation, 7 July 2015).
The following table provided by Caniuse.com shows the level of browser support for this feature.
For maximum browser compatibility many web developers add browser-specific properties by using extensions such as
-webkit- for Safari, Google Chrome, and Opera (newer versions),
-ms- for Internet Explorer,
-moz- for Firefox,
-o- for older versions of Opera etc. As with any CSS property, if a browser doesn't support a proprietary extension, it will simply ignore it.
This practice is not recommended by the W3C, however in many cases, the only way you can test a property is to include the CSS extension that is compatible with your browser.
The major browser manufacturers generally strive to adhere to the W3C specifications, and when they support a non-prefixed property, they typically remove the prefixed version. Also, W3C advises vendors to remove their prefixes for properties that reach Candidate Recommendation status.
Many developers use Autoprefixer, which is a postprocessor for CSS. Autoprefixer automatically adds vendor prefixes to your CSS so that you don't need to. It also removes old, unnecessary prefixes from your CSS.
You can also use Autoprefixer with preprocessors such as Less and Sass.