Fix navigation with proper fraction#1128
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MrRogerHuang wants to merge 10 commits intofuturepress:masterfrom
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Fix navigation with proper fraction#1128MrRogerHuang wants to merge 10 commits intofuturepress:masterfrom
MrRogerHuang wants to merge 10 commits intofuturepress:masterfrom
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…ction with different writing modes.
hiive
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Apr 6, 2026
…urepress#1128, futurepress#1308, futurepress#1336, futurepress#1300 - futurepress#1129: Fix locationOf crash on empty ranges — use parentElement fallback - futurepress#1128: Fix fractional scrollLeft causing stuck navigation — Math.floor - futurepress#1308: Fix float rounding in vertical bottom detection (2199.99 vs 2200) - futurepress#1336: Fix can't turn pages after resize — ViewMap cleanup, always destroy - futurepress#1300: Remove outdated WebKit range workaround for hash links
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These two lines could have numbers between 0 and 1 (proper fractions) during navigations:
epub.js/src/managers/default/index.js
Line 451 in a1e77b7
epub.js/src/managers/default/index.js
Line 562 in a1e77b7
Even if an ePub section (e.g. a cover page or a table of content page) has only one page, a proper fraction causes prev() or next() can't correct go to the previous or next section, because these condition tests are true:
epub.js/src/managers/default/index.js
Line 451 in a1e77b7
epub.js/src/managers/default/index.js
Line 562 in a1e77b7
A browser inspector confirms the problem (this.container.scrollLeft has a value 0.8000...):
In user perspective, user has to execute prev() or next() twice to correctly go to the previous or next section!
This pull request fixes only two navigation cases (depending on section layouts), not all navigation cases, because my tested ePub files can only triggers these two cases.