{
    "tracks-alignment": [
        {
            "engines": [
                "gecko"
            ],
            "needsflag": [
                "gecko"
            ],
            "filename": "css/properties/align-tracks.json",
            "name": "align-tracks",
            "slug": "CSS/align-tracks",
            "mdn_url": "https://developer.mozilla.org/en-US/docs/Web/CSS/align-tracks",
            "summary": "The align-tracks CSS property sets the alignment in the masonry axis for grid containers that have masonry in their block axis.",
            "support": {
                "chrome": {
                    "version_added": false
                },
                "chrome_android": "mirror",
                "edge": "mirror",
                "firefox": {
                    "version_added": "77",
                    "flags": [
                        {
                            "type": "preference",
                            "name": "layout.css.grid-template-masonry-value.enabled",
                            "value_to_set": "true"
                        }
                    ]
                },
                "firefox_android": "mirror",
                "ie": {
                    "version_added": false
                },
                "oculus": "mirror",
                "opera": "mirror",
                "opera_android": "mirror",
                "safari": {
                    "version_added": false
                },
                "safari_ios": "mirror",
                "samsunginternet_android": "mirror",
                "webview_android": "mirror",
                "edge_blink": {
                    "version_added": false
                }
            },
            "title": "align-tracks"
        },
        {
            "engines": [
                "gecko"
            ],
            "needsflag": [
                "gecko"
            ],
            "filename": "css/properties/justify-tracks.json",
            "name": "justify-tracks",
            "slug": "CSS/justify-tracks",
            "mdn_url": "https://developer.mozilla.org/en-US/docs/Web/CSS/justify-tracks",
            "summary": "The justify-tracks CSS property sets the alignment in the masonry axis for grid containers that have masonry in their inline axis.",
            "support": {
                "chrome": {
                    "version_added": false
                },
                "chrome_android": "mirror",
                "edge": "mirror",
                "firefox": {
                    "version_added": "77",
                    "flags": [
                        {
                            "type": "preference",
                            "name": "layout.css.grid-template-masonry-value.enabled",
                            "value_to_set": "true"
                        }
                    ]
                },
                "firefox_android": "mirror",
                "ie": {
                    "version_added": false
                },
                "oculus": "mirror",
                "opera": "mirror",
                "opera_android": "mirror",
                "safari": {
                    "version_added": false
                },
                "safari_ios": "mirror",
                "samsunginternet_android": "mirror",
                "webview_android": "mirror",
                "edge_blink": {
                    "version_added": false
                }
            },
            "title": "justify-tracks"
        }
    ],
    "masonry-layout": [
        {
            "engines": [
                "blink",
                "gecko",
                "webkit"
            ],
            "filename": "css/properties/grid-template-columns.json",
            "name": "grid-template-columns",
            "slug": "CSS/grid-template-columns",
            "mdn_url": "https://developer.mozilla.org/en-US/docs/Web/CSS/grid-template-columns",
            "summary": "The grid-template-columns CSS property defines the line names and track sizing functions of the grid columns.",
            "support": {
                "chrome": {
                    "version_added": "57"
                },
                "chrome_android": "mirror",
                "edge": {
                    "version_added": "16"
                },
                "firefox": {
                    "version_added": "52"
                },
                "firefox_android": "mirror",
                "ie": {
                    "version_added": "10",
                    "alternative_name": "-ms-grid-columns"
                },
                "oculus": "mirror",
                "opera": "mirror",
                "opera_android": "mirror",
                "safari": {
                    "version_added": "10.1"
                },
                "safari_ios": "mirror",
                "samsunginternet_android": {
                    "version_added": "6.0"
                },
                "webview_android": "mirror",
                "edge_blink": {
                    "version_added": "79"
                }
            },
            "title": "grid-template-columns"
        },
        {
            "engines": [
                "gecko",
                "webkit"
            ],
            "needsflag": [
                "gecko"
            ],
            "filename": "css/properties/grid-template-rows.json",
            "name": "masonry",
            "slug": "CSS/CSS_Grid_Layout/Masonry_Layout",
            "mdn_url": "https://developer.mozilla.org/en-US/docs/Web/CSS/CSS_Grid_Layout/Masonry_Layout",
            "summary": "Level 3 of the CSS grid layout specification includes a masonry value for grid-template-columns and grid-template-rows. This guide details what masonry layout is and how to use it.",
            "support": {
                "chrome": {
                    "version_added": false
                },
                "chrome_android": "mirror",
                "edge": "mirror",
                "firefox": {
                    "version_added": "77",
                    "flags": [
                        {
                            "type": "preference",
                            "name": "layout.css.grid-template-masonry-value.enabled",
                            "value_to_set": "true"
                        }
                    ]
                },
                "firefox_android": "mirror",
                "ie": {
                    "version_added": false
                },
                "oculus": "mirror",
                "opera": "mirror",
                "opera_android": "mirror",
                "safari": {
                    "version_added": "preview"
                },
                "safari_ios": "mirror",
                "samsunginternet_android": "mirror",
                "webview_android": "mirror",
                "edge_blink": {
                    "version_added": false
                }
            },
            "title": "Masonry layout"
        },
        {
            "engines": [
                "blink",
                "gecko",
                "webkit"
            ],
            "filename": "css/properties/grid-template-rows.json",
            "name": "grid-template-rows",
            "slug": "CSS/grid-template-rows",
            "mdn_url": "https://developer.mozilla.org/en-US/docs/Web/CSS/grid-template-rows",
            "summary": "The grid-template-rows CSS property defines the line names and track sizing functions of the grid rows.",
            "support": {
                "chrome": {
                    "version_added": "57"
                },
                "chrome_android": "mirror",
                "edge": {
                    "version_added": "16"
                },
                "firefox": {
                    "version_added": "52"
                },
                "firefox_android": "mirror",
                "ie": {
                    "version_added": "10",
                    "alternative_name": "-ms-grid-rows"
                },
                "oculus": "mirror",
                "opera": "mirror",
                "opera_android": "mirror",
                "safari": {
                    "version_added": "10.1"
                },
                "safari_ios": "mirror",
                "samsunginternet_android": {
                    "version_added": "6.0"
                },
                "webview_android": "mirror",
                "edge_blink": {
                    "version_added": "79"
                }
            },
            "title": "grid-template-rows"
        }
    ],
    "masonry-auto-flow": [
        {
            "engines": [
                "webkit"
            ],
            "filename": "css/properties/masonry-auto-flow.json",
            "name": "masonry-auto-flow",
            "slug": "CSS/masonry-auto-flow",
            "mdn_url": "https://developer.mozilla.org/en-US/docs/Web/CSS/masonry-auto-flow",
            "summary": "The masonry-auto-flow CSS property modifies how items are placed when using masonry in CSS Grid Layout.",
            "support": {
                "chrome": {
                    "version_added": false
                },
                "chrome_android": "mirror",
                "edge": "mirror",
                "firefox": {
                    "version_added": false
                },
                "firefox_android": "mirror",
                "ie": {
                    "version_added": false
                },
                "oculus": "mirror",
                "opera": "mirror",
                "opera_android": "mirror",
                "safari": {
                    "version_added": "preview"
                },
                "safari_ios": "mirror",
                "samsunginternet_android": "mirror",
                "webview_android": "mirror",
                "edge_blink": {
                    "version_added": false
                }
            },
            "title": "masonry-auto-flow"
        }
    ]
}