Package chart evidence without certification claims
See this course’s project requirements
A local SVG bar chart generated from fictional library-use rows, with checked numeric scale, visible labels, matching data table and a text summary.
Keep your working files in your own notebook or software. Save a private description, checklist, and work link in My Proof.
What to include
- State the chart question, validated row contract, and limits of the fictional dataset.
- Produce a checked common-scale geometry table with value, height, and top coordinate.
- Create namespaced SVG shapes and labels from one validated source and inspect their rendered agreement.
- Provide and reconcile the chart name, fuller text summary, and structured data table.
- Retain a baseline/change matrix proving every represented value stays synchronized.
- Deliver the chart with independent arithmetic and separate data, rendered, and assistive test statuses.
Review and revise
Use these criteria to check your work and choose what to improve.
- The implementation or declared simulation follows the supplied contract and retains inspectable original inputs.
- Normal, boundary and rejected cases are recorded with expected versus observed results.
- The changed case has a correct explanation and does not rely on hidden state.
- The project includes source, outputs, instructions and honest tool, privacy and verification limits.
Want more background?
The idea in everyday life
Files chart.html, chart-data.mjs and test-chart.mjs use North 8, South 12, West 0 fictional visits. Serve locally with python3 -m http.server 8765 --bind 127.0.0.1; open chart.html.
Data assertions check geometry and totals; rendered checks inspect visibility and correspondence; assistive-technology behavior needs actual tool evidence.
Package chart evidence without certification claims — original worked practice
Data assertions check geometry and totals; rendered checks inspect visibility and correspondence; assistive-technology behavior needs actual tool evidence.
Files chart.html, chart-data.mjs and test-chart.mjs use North 8, South 12, West 0 fictional visits. Serve locally with python3 -m http.server 8765 --bind 127.0.0.1; open chart.html.
1. Step 1
Run node test-chart.mjs and retain its nine-check output.
You should see: 9 chart data checks passed.
Data assertions check geometry and totals; rendered checks inspect visibility and correspondence; assistive-technology behavior needs actual tool evidence.
2. Step 2
Inspect chart, labels, summary, and table at wide and narrow widths in the browser.
You should see: Actual rendered comparisons are recorded.
Data assertions check geometry and totals; rendered checks inspect visibility and correspondence; assistive-technology behavior needs actual tool evidence.
3. Step 3
If an available reader is used, record tool, navigation method, and spoken information; otherwise mark that check unverified.
You should see: Assistive execution is separated from source structure.
Data assertions check geometry and totals; rendered checks inspect visibility and correspondence; assistive-technology behavior needs actual tool evidence.
4. Step 4
Deliver the source, independent arithmetic, changed-case evidence, and exact limitations.
You should see: An accessible-chart practice packet without certification claims.
Data assertions check geometry and totals; rendered checks inspect visibility and correspondence; assistive-technology behavior needs actual tool evidence.
What to finish
Deliver the chart with independent arithmetic and separate data, rendered, and assistive test statuses.
Watch for this
Calling data-function assertions an accessibility certification or completed reader test.
How can I tell I understand it?
Demonstrate the rule: Data assertions check geometry and totals; rendered checks inspect visibility and correspondence; assistive-technology behavior needs actual tool evidence. Use the supplied variant to distinguish a changed result from a broken implementation.
Quick knowledge check
Answer all 3 questions. Get at least 2 right and the lesson completes automatically.
You’ll get an explanation for each answer. Signed in? Your results save to your account.
Pass the check. We’ll save the progress.
Answer all 3 questions above and get at least 2 right. You can review the explanations and try again.
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Sources and further reading
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Source & access notes · checked 2026-10-01
Relevant documented module/API behavior inspected during expansion authoring; actual execution evidence is recorded separately. No grant eligibility is established.
Access: Official page retrieved with the web reader on 2026-10-01. Documentation reading does not certify execution in every native tool or browser.
Reuse: Original local practice files, fictional data, worked examples and questions. Concepts paraphrased and linked; source exercises are not copied.
Source & access notes · checked 2026-10-01
Relevant documented module/API behavior inspected during expansion authoring; actual execution evidence is recorded separately. No grant eligibility is established.
Access: Official page retrieved with the web reader on 2026-10-01. Documentation reading does not certify execution in every native tool or browser.
Reuse: Original local practice files, fictional data, worked examples and questions. Concepts paraphrased and linked; source exercises are not copied.
Source & access notes · checked 2026-10-01
Relevant documented module/API behavior inspected during expansion authoring; actual execution evidence is recorded separately. No grant eligibility is established.
Access: Official page retrieved with the web reader on 2026-10-01. Documentation reading does not certify execution in every native tool or browser.
Reuse: Original local practice files, fictional data, worked examples and questions. Concepts paraphrased and linked; source exercises are not copied.
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