<meter>: The HTML Meter element - HTML: HyperText Markup Language 编辑

The HTML <meter> element represents either a scalar value within a known range or a fractional value.

The source for this interactive example is stored in a GitHub repository. If you'd like to contribute to the interactive examples project, please clone https://github.com/mdn/interactive-examples and send us a pull request.

Attributes

This element includes the global attributes.

value

The current numeric value. This must be between the minimum and maximum values (min attribute and max attribute) if they are specified. If unspecified or malformed, the value is 0. If specified, but not within the range given by the min attribute and max attribute, the value is equal to the nearest end of the range. Note: Unless the value attribute is between 0 and 1 (inclusive), the min and max attributes should define the range so that the value attribute's value is within it.

min

The lower numeric bound of the measured range. This must be less than the maximum value (max attribute), if specified. If unspecified, the minimum value is 0.

max

The upper numeric bound of the measured range. This must be greater than the minimum value (min attribute), if specified. If unspecified, the maximum value is 1.

low

The upper numeric bound of the low end of the measured range. This must be greater than the minimum value (min attribute), and it also must be less than the high value and maximum value (high attribute and max attribute, respectively), if any are specified. If unspecified, or if less than the minimum value, the low value is equal to the minimum value.

high

The lower numeric bound of the high end of the measured range. This must be less than the maximum value (max attribute), and it also must be greater than the low value and minimum value (low attribute and min attribute, respectively), if any are specified. If unspecified, or if greater than the maximum value, the high value is equal to the maximum value.

optimum

This attribute indicates the optimal numeric value. It must be within the range (as defined by the min attribute and max attribute). When used with the low attribute and high attribute, it gives an indication where along the range is considered preferable. For example, if it is between the min attribute and the low attribute, then the lower range is considered preferred. The browser may color the meter's bar differently depending on whether the value is less than or equal to the optimum value.

form

The <form> element to associate the <meter> element with (its form owner). The value of this attribute must be the id of a <form> in the same document. If this attribute is not set, the <meter> is associated with its ancestor <form> element, if any. This attribute is only used if the <meter> element is being used as a form-associated element, such as one displaying a range corresponding to an <input type="number">.

Examples

Simple example

HTML

<p>Heat the oven to <meter min="200" max="500"
  value="350">350 degrees</meter>.</p>

Result

On Google Chrome, the resulting meter looks like this:

High and Low range example

Note that in this example the min attribute is omitted. This is allowed, as it will default to 0.

HTML

<p>He got a <meter low="69" high="80" max="100"
  value="84">B</meter> on the exam.</p>

Result

On Google Chrome, the resulting meter looks like this:

Specifications

Browser compatibility

BCD tables only load in the browser

See also

• <progress>