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For Bootstrap 5.3, put the progress-bar role, accessible name, and value on the outer .progress element; use the inner .progress-bar for the visible fill and label. This is the current documented structure and differs from the older Bootstrap 5.2 markup.
Bootstrap 5.3 progress bar: the basic pattern
Use the wrapper as the semantic progress indicator and set the inner bar’s width to match its current value. This example follows Bootstrap 5.3’s progress component documentation:
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<div class="progress" role="progressbar" aria-label="Upload progress" aria-valuenow="25" aria-valuemin="0" aria-valuemax="100">
<div class="progress-bar" style="width: 25%">25%</div>
</div>Change both the ARIA value and the visual width when progress changes. The wrapper exposes the name and numeric range to assistive technology; the nested bar supplies the visual treatment. The percentage shown in the bar is optional.
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Which Bootstrap version does your markup target?
Bootstrap 5.3 introduced new progress-bar markup. Bootstrap says the previous structure is deprecated and “will continue to work until v6.” In the older pattern documented for Bootstrap 5.2, the inner .progress-bar carries the progressbar role and ARIA values. Keep snippets version-labeled rather than combining the two structures.
#1 Best Overall
| Bootstrap version | Element carrying progress semantics | Visual fill |
|---|---|---|
| 5.3 | Outer .progress wrapper |
Nested .progress-bar |
| 5.2 | Inner .progress-bar |
.progress-bar |
For the exact earlier example, consult Bootstrap 5.2’s progress documentation. The migration note and current examples are in the Bootstrap 5.3 documentation.
Make the value understandable without relying on color
- Give each progress indicator an accessible name with
aria-label,aria-labelledby, or another appropriate labeling method. - Expose the current value and its range. Bootstrap’s examples set
aria-valuenow,aria-valuemin, andaria-valuemax. WAI-ARIA guidance says explicit minimum and maximum values are only needed when the minimum is not 0 or the maximum is not 100; including all three, as Bootstrap does, is a clear pattern. - Do not use color as the only way to convey status. Choose text and colors with suitable contrast against both the track and the fill.
These range-property details are explained in the WAI-ARIA Authoring Practices Guide.
Adapt the appearance without changing the meaning
Bootstrap documents width and height sizing, labels, contextual background colors, striped and animated backgrounds, and stacked bars. Treat these as presentation choices: keep the accessible name and value aligned with the progress being shown.
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Set the fill width with an inline style, a utility class, or custom CSS. Bootstrap also supports height customization. A text label inside the fill can be clipped when the bar is short or lack enough contrast. If it will not remain legible, put the label outside the bar and ensure it still identifies the progress or status clearly.
Rank #3
Use contextual color, stripes, or animation
Background color and striped or animated treatments can distinguish visual states, but they do not replace a text label or the ARIA value. Preserve sufficient contrast between any label, the fill, and the track.
Build a stacked bar
For a stacked pattern, Bootstrap uses .progress-stacked around individual .progress elements; set the widths on those segments. Give the overall indicator and its segments clear meaning in the surrounding interface so users are not asked to infer status from color alone.
Announce progress that changes during a task
Updating an element’s ARIA value makes the current value available, but does not by itself guarantee that assistive technology will announce every change. For an operation that runs and updates over time, W3C’s ARIA25 technique demonstrates using a live region to convey changing status. Keep the live update useful rather than announcing unnecessary detail at every increment.
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Start with the official Bootstrap 5.3 examples for current markup, sizing, colors, stripes, animation, and stacked bars. For an additional tutorial and examples, Material Design for Bootstrap’s progress tutorial uses the phrase “free examples & tutorial” in its title. Check the version and markup before copying a snippet into your project.
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