css/properties/text-rendering.json

{
  "css": {
    "properties": {
      "text-rendering": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/text-rendering",
          "spec_url": "https://svgwg.org/svg2-draft/painting.html#TextRenderingProperty",
          "support": {
            "chrome": {
              "version_added": "4",
              "notes": [
                "This property is only supported on Windows and Linux.",
                "Initial versions had bugs on Windows and Linux that broke <a href='https://crbug.com/114719'>font substitution</a>, <a href='https://crbug.com/51973'>small-caps</a>, <a href='https://crbug.com/55458'>letter-spacing</a> or caused <a href='https://crbug.com/149548'>text to overlap</a>."
              ]
            },
            "chrome_android": "mirror",
            "edge": "mirror",
            "firefox": {
              "version_added": "1",
              "notes": [
                "This property is only supported on Windows and Linux.",
                "The <code>optimizeSpeed</code> option has no effect on Firefox 4 because the standard code for text rendering is already fast and there is not a faster code path at this time. See <a href='https://bugzil.la/595688'>bug 595688</a> for details."
              ]
            },
            "firefox_android": {
              "version_added": "46"
            },
            "ie": {
              "version_added": false
            },
            "oculus": "mirror",
            "opera": {
              "version_added": "15"
            },
            "opera_android": {
              "version_added": "14"
            },
            "safari": {
              "version_added": "5"
            },
            "safari_ios": "mirror",
            "samsunginternet_android": {
              "version_added": "1.0",
              "notes": "This property is only supported on Windows and Linux. Samsung Internet is not on Windows or Linux."
            },
            "webview_android": {
              "version_added": "3",
              "notes": "From version 3 to 4.3, there is a serious bug where <code>text-rendering: optimizeLegibility</code> causes custom web fonts to not render. This was fixed in version 4.4."
            }
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        },
        "auto": {
          "__compat": {
            "description": "<code>auto</code>",
            "support": {
              "chrome": {
                "version_added": "4",
                "notes": "Chrome treats <code>auto</code> as <code>optimizeSpeed</code>."
              },
              "chrome_android": "mirror",
              "edge": "mirror",
              "firefox": {
                "version_added": "1",
                "notes": "If the font size is 20 pixels or higher, Firefox treats <code>auto</code> as <code>optimizeLegibility</code>. For smaller text, Firefox treats <code>auto</code> as <code>optimizeSpeed</code>. The 20-pixel threshold can be changed with the <code>browser.display.auto_quality_min_font_size</code> preference."
              },
              "firefox_android": {
                "version_added": "46",
                "notes": "If the font size is 20 pixels or higher, Firefox treats <code>auto</code> as <code>optimizeLegibility</code>. For smaller text, Firefox treats <code>auto</code> as <code>optimizeSpeed</code>. The 20-pixel threshold can be changed with the <code>browser.display.auto_quality_min_font_size</code> preference."
              },
              "ie": {
                "version_added": false
              },
              "oculus": "mirror",
              "opera": "mirror",
              "opera_android": "mirror",
              "safari": {
                "version_added": "5",
                "notes": "Safari treats <code>auto</code> as <code>optimizeSpeed</code>. See <a href='https://webkit.org/b/41363'>WebKit bug 41363</a>."
              },
              "safari_ios": "mirror",
              "samsunginternet_android": "mirror",
              "webview_android": {
                "version_added": "≤37",
                "notes": "WebView treats <code>auto</code> as <code>optimizeSpeed</code>."
              }
            },
            "status": {
              "experimental": false,
              "standard_track": false,
              "deprecated": false
            }
          }
        },
        "geometricPrecision": {
          "__compat": {
            "description": "<code>geometricPrecision</code>",
            "support": {
              "chrome": {
                "version_added": "13",
                "notes": "Supports true geometric precision without rounding up or down to the nearest supported font size in the operating system."
              },
              "chrome_android": "mirror",
              "edge": "mirror",
              "firefox": {
                "version_added": "1",
                "notes": "Firefox treats <code>geometricPrecision</code> the same as <code>optimizeLegibility</code>."
              },
              "firefox_android": {
                "version_added": "46",
                "notes": "Firefox treats <code>geometricPrecision</code> the same as <code>optimizeLegibility</code>."
              },
              "ie": {
                "version_added": false
              },
              "oculus": "mirror",
              "opera": "mirror",
              "opera_android": "mirror",
              "safari": {
                "version_added": "6"
              },
              "safari_ios": "mirror",
              "samsunginternet_android": "mirror",
              "webview_android": {
                "version_added": "37",
                "notes": "Supports true geometric precision without rounding up or down to the nearest supported font size in the operating system."
              }
            },
            "status": {
              "experimental": false,
              "standard_track": false,
              "deprecated": false
            }
          }
        }
      }
    }
  }
}