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node_modules/stylelint/lib/rules/function-url-data-uris/README.md

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+# function-url-data-uris
+
+Require or disallow data URIs for urls.
+
+```css
+a { background-image: url('data:image/gif;base64,R0lGODlh='); }
+/**                        ↑ 
+ *                  This data URI */
+```
+
+This rule ignores variables inside `url` function (`$sass`, `@less`, `--custom-property`).
+
+## Options
+
+`string`: `"always"|"never"`
+
+### `"always"`
+
+There *must always* be data URIs in url.
+
+The following patterns are considered warnings:
+
+```css
+a { 
+  background-image: url(image.gif) 
+} 
+```
+
+```css
+@font-face { 
+  font-family: 'foo'; 
+  src: url(foo.ttf); 
+}
+```
+
+The following patterns are *not* considered warnings:
+
+```css
+a {
+  background-image: url('data:image/gif;base64,R0lGODlhAQABAIAAAAUEBAAAACwAAAAAAQABAAACAkQBADs=')
+}
+```
+
+```css
+@font-face { 
+  font-family: 'foo'; 
+  src: url(data:font/ttf;base64,R0lGODlhAQABAIAAAAUEBAAAACwAAAAAAQABAAACAkQBADs=); 
+}
+```
+
+### `"never"`
+
+There *must never* be data URIs in url.
+
+The following patterns are considered warnings:
+
+```css
+a {
+  background-image: url('data:image/gif;base64,R0lGODlhAQABAIAAAAUEBAAAACwAAAAAAQABAAACAkQBADs=')
+}
+```
+
+```css
+@font-face { 
+  font-family: 'foo'; 
+  src: url(data:font/ttf;base64,R0lGODlhAQABAIAAAAUEBAAAACwAAAAAAQABAAACAkQBADs=); 
+}
+```
+
+The following patterns are *not* considered warnings:
+
+```css
+a {
+  background-image: url(image.gif) 
+}
+```
+
+```css
+@font-face { 
+  font-family: 'foo'; 
+  src: url(foo.ttf); 
+}
+```