[Webkit-unassigned] [Bug 139750] Web Inspector: <body> shows unexpected UserAgent margin styles (one non-implicit, others implicit)

Wed Dec 17 15:19:46 PST 2014

https://bugs.webkit.org/show_bug.cgi?id=139750

--- Comment #2 from Joseph Pecoraro <joepeck at webkit.org> ---
Looks like an issue with the backend reply for CSS.getMatchedStylesForNode dealing with shorthanded entries. For "margin: 8px" it sends some of the long-hands as implicit.

frontend: {
    "method": "CSS.getMatchedStylesForNode",
    "params": {
        "nodeId": 8,
        "includePseudo": true,
        "includeInherited": true
    },
    "id": 52
}

backend: {
    "result": {
        "matchedCSSRules": [{
            "rule": {
                "selectorList": {
                    "selectors": [{
                        "text": "body",
                        "specificity": [0, 0, 1]
                    }],
                    "text": "body"
                },
                "sourceLine": 0,
                "origin": "user-agent",
                "style": {
                    "cssProperties": [{
                        "name": "display",
                        "value": "block"
                    }, {
                        "name": "margin-top",
                        "value": "8px"
                    }, {
                        "name": "margin-right",
                        "value": "8px",
                        "implicit": true
                    }, {
                        "name": "margin-bottom",
                        "value": "8px",
                        "implicit": true
                    }, {
                        "name": "margin-left",
                        "value": "8px",
                        "implicit": true
                    }],
                    "shorthandEntries": [{
                        "name": "margin",
                        "value": "8px"
                    }],
                    "styleId": {
                        "styleSheetId": "4",
                        "ordinal": 2
                    },
                    "width": "",
                    "height": ""
                }
            },
            "matchingSelectors": [0]
        }],
        ...
    },
    "id": 52
}

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