meter ... ⁄meter
HTML5 meter element
The meter element allows you to represent the result of a scalar measurement within a known range (a gauge). »video
- scalar: a quantity (mass, volume, temperature, density, length, speed, distance...) specified ONLY by its magnitude (size) with no direction; it's magnitude (size) returns 1 value ONLY
- scalar measurement: the measurement of something (a quantity) that can be expressed as a single value: 1 value ONLY (a number and one or more units attached to the number: e.g 2cm, 8pounds, 8people, 9days, 10h, 1s, 12min, 4km/h etc.)
Example
The x candidate was re-elected for a second term of five years with 45 votes out of 60.
where:
- the range is: 0 → 60,
- the scalar measurement returned 1 value: 45votes (number:45, attached unit:votes),
- using element we will represent the result of 45 votes within the range (=the 60 votes) 45 out of 60 OR we can represent straight the fractional value of 0.75 = 45/60 »video
About meter
- is an optional element
- multiple meter elements allowed per HTML5 document
Display & support meter
- display in browser »video
- display type: inline-block
6Parents, children meter
- meter nested within elements »meter parents
- elements nested within meter »meter children
»examples
Attributes meter
- required: value,
- optional: min, low, optimum, high, max, global attributes, event attributes
Observation:
- min, max attributes are optional; when not specified they have default values; when specified, their value is given by the specified value
- title global attribute may have a different semantic on the meter element allowing you to specify the unit measure as its value »video
Recommendation
Warning
To mark up the completion rate ⁄ degree of progress of an "in progress" task through a progress bar, use progress element and not meter.
Syntax meter
| 1 | <> ... </> »video |
Attributes and Values meter (comma separated)
| < | attribute | = | "attribute_value(s)" | > | Video | Examples |
|---|---|---|---|---|---|---|
| 1. specific attributes | ||||||
| 1. | high | = | valid floating-point number | »video | < value="5" high="9" max="9"> ... <⁄> | |
| 2. | low | = | valid floating-point number | »video | < value="5" min="1" low="2" max="9"> ... <⁄> | |
| 3. | max | = | 1, valid floating-point number | »video | < value="2" max="9"> ... <⁄> | |
| 4. | min | = | 0, valid floating-point number | »video | < min="2" value="3" max="9"> ... <⁄> | |
| 5. | optimum | = | valid floating-point number | »video | < value="3" optimum="3" max="9"> ... <⁄> | |
| 6. | value | = | valid floating-point number | »video | < min="3" value="6" max="9"> ... <⁄> | |
| All Specific Attributes | ||||||
| 2. global attributes | ||||||
| 1. | accesskey | = | keyboard key | »img | < accesskey="h"> ... </> | |
| 2. | class | = | class name | »html »img | < class="class_name"> ... </> | |
| 3. | contenteditable | = | "", , true, false | »html | < contenteditable="true"> ... </> | |
| 4. | contextmenu | = | menu id value | »html | < contextmenu="menu_id_value"> ... </> | |
| 5. | data-* | = | value | - | < data-http-error="404"> ... </> | |
| 6. | dir | = | ltr, rtl, auto | »html | < dir="ltr"> ... </> | |
| 7. | draggable | = | true, , false | »img | < draggable="false"> ... </> | |
| 8. | dropzone | = | copy, move, link, string:, file: | - | < dropzone="copy"> ... </> | |
| 9. | hidden | = | "", , hidden | »html »img | < hidden="hidden"> ... </> | |
| 10. | id | = | id name | »html »img | < id="unique_id_name"> ... </> | |
| 11. | itemid | = | URL | - | - | |
| 12. | itemprop | = | string | »link »a | - | |
| 13. | itemref | = | string | - | - | |
| 14. | itemscope | = | "", , itemscope | - | - | |
| 15. | itemtype | = | absolute URL | - | - | |
| 16. | lang | = | language code | »html »head»title »img | < lang="en"> ... </> | |
| 17. | spellcheck | = | "", , true, false | »html | < spellcheck="true"> ... </> | |
| 18. | style | = | CSS property:value | »html »img | < style="color:red"> ... </> | |
| 19. | tabindex | = | integer | »img | < tabindex="3"> ... </> | |
| 20. | title | = | text | »html »link»style »abbr»dfn »img »meter | < title="html page"> ... </> | |
| 21. | translate | = | "", yes, no | »html »img | < translate="yes"> ... </> | |
| All Global Attributes | ||||||
| 3. global event attributes | ||||||
| 1. | onclick | = | script | » list | <element onclick="script" > ... | |
| 2. | ondblclick | = | script | » list | <element ondblclick="script" > ... | |
| All Event Attributes | ||||||
Video demonstration meter element
HTML5 meter element: gauge representation
| min | video details |
|---|---|
| 00:00 | video tutorial: meter element |
| 00:05 | meter element allows you to represent the result of a scalar measurement within a known range (aka a gauge) |
| 00:10 | Taking this example: The x candidate was re-elected with a majority of 45 votes out of 60. |
| 00:14 | the range is: 0..60 (0 to 60) |
| 00:18 | the result of the scalar measurement is: 45 votes where: '45' represents the number and 'votes' represents the unit measure attached to the number |
| 00:24 | '45 out of 60' or '0.75' can be represented through meter element like this: |
| 00:43 | '45 out of 60' displays in green on the gray segment |
| 00:50 | or we can represent straight the value of 0.75 (no need to add the max attribute because its default value="1") |
| 00:57 | another example |
| 01:00 | we can use the meter element to represent the Browser usage |
| 01:21 | for each Browser, we are adding the value that will be represented on the meter |
| 01:31 | the green segments indicate the browser usage |
| 01:38 | other examples - colors/segments: the value (0.2) can be represented on the meter in: - green, - yellow or - red, depending on the optimal segment - if the value it's in it - outside but next to it, or - 1 segment away from it |
For more information about the element, please see the specs: W3C ⁄ WHATWG