Bug 200776

Summary:

IntersectionObserverEntry#intersectionRatio can be larger than 1

Product:

WebKit

Reporter:

Tim Guan-tin Chien [:timdream] <timdream>

Component:

Layout and Rendering

Assignee:

Ali Juma <ajuma>

Status:

RESOLVED FIXED

Severity:

Normal

CC:

ajuma, bfulgham, cdumez, commit-queue, dbates, esprehn+autocc, ews-watchlist, kangil.han, simon.fraser, timdream, webkit-bug-importer, zalan

Priority:

Keywords:

InRadar

Version:

Safari Technology Preview

Hardware:

Unspecified

OS:

Unspecified

Attachments:

Description	Flags
test case	none
Patch	none

Tim Guan-tin Chien [:timdream]

Reported 2019-08-15 11:18:14 PDT

Created attachment 376398 [details] test case STR: Load the minimal test case. the callback will put the intersectionRatio on the page. Expected: The intersectionRatio should be exactly 1 in this case because the element is entirely in the viewport. Actual: It's 1.0270270109176636. The spec states it should be a number between 0 and 1. https://w3c.github.io/IntersectionObserver/#dom-intersectionobserverentry-intersectionratio This is also reproducible on Chrome but not Firefox.

Attachments
test case (657 bytes, text/html) 2019-08-15 11:18 PDT, Tim Guan-tin Chien [:timdream]	no flags	Details
Patch (5.71 KB, patch) 2019-09-13 08:54 PDT, Ali Juma	no flags	Details Formatted Diff Diff
View All Add attachment proposed patch, testcase, etc.