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progress-value-bounds

Enforce the inequalities required by HTML Living Standard §4.10.14 (the progress element):

  • value ≤ max when both attributes are present.
  • value ≤ 1 when only value is specified (the implicit maximum).

Authored-but-unparsable attribute values, an out-of-range max (≤ 0), and a negative value are deferred to invalid-attr and skipped here to avoid compounding diagnostics.

❌ Examples of incorrect code for this rule

<progress value="10" max="5">10 of 5</progress> <progress value="1.5">150%</progress>

✅ Examples of correct code for this rule

<progress value="0.5">50%</progress> <progress value="30" max="100">30%</progress>

Interface​

{
  "progress-value-bounds": boolean
}

Enforce HTML LS inequalities for the progress element (value ≤ max; value ≤ 1 when max is absent).

Default Severity​

error