Meter is used to represent an available quantity or allotment of a measurable unit.
Overview
Meter should be used when displaying the amount of a resource remaining, or yet to be used. It can represent the quantity of resource consumed as a value, in relation to min and max limits, and optionally display low and high quantity thresholds to a user.
Meter can also be used to display a count or quantity anytime max is a known value. For instance, Meter is an appropriate way of displaying the number of days in a year that precipitation has been recorded.
Usage
- Display the remaining number of credits or other resource available
- Display the amount of storage used on a hard drive
- Communicate significant quantity thresholds that could impact a user's experience
- Display a count or quantity accrued towards a
max
Sample
Best Practices
While visually similar to Progress, Meter has distinct capabilities and intended use cases.
value can be set. The value is always a percentage between zero and one hundred. Progress should be used to represent system-initiated tasks or processes.min values of less than zero and may have max values of greater or less than one hundred. The value may fluctuate and, when fillType is "range", may convey meaning to the user through use of low and high properties.Recommendations
It is recommended to use low and/or high when they represent quantities of significance. For instance, if the value exceeds high, it may be useful to display corresponding messaging in a Notice, or send an email to the user with further communication.
Fill types
Use the appropriate fill. The default, "range", is useful for providing context about the importance of the current value, for example if a user is approaching the limit of their available storage. Use "single" when there is no inherent benefit or detriment to the current value.
fillType of "range" when the quantity or allotment could become scarce and negatively impact a user.fillType of "single" when the current quantity or allotment is strictly informative and has no positive or negative bearing on the user.low or high if there is no significance to the range.fillType of "range" when conveying a quantity that has no positive or negative bearing on the user.Label types
The value and range properties can be configured as "units" or "percent". The former can be useful when displaying explicit quantities to a user. The latter is often used to simplify complex or lengthy numbers. It can be valid to use a combination of values, for example setting range as "percent" and the value as "units".
When using value or range as "units", it may be useful to use the unit property to provide additional context to a user.
valueLabelType or valueLabelType of "units", when knowing the explicit number may benefit a user.valueLabelType or valueLabelType of "percent" when the numbers are long, or the exact numeric value is not important to a user.unitType.unitType."percent" for valueLabelType when the exact numeric value may be of importance to a user.