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node_modules/stylelint/lib/rules/function-url-quotes/README.md

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+# function-url-quotes
+
+Require or disallow quotes for urls.
+
+```css
+a { background: url("x.jpg") }
+/**                 ↑     ↑
+ *             These quotes */
+```
+
+## Options
+
+`string`: `"always"|"never"`
+
+### `"always"`
+
+Urls *must always* be quoted.
+
+The following patterns are considered warnings:
+
+```css
+@import url(foo.css);
+```
+
+```css
+@document domain(http://www.w3.org/);
+```
+
+```css
+@font-face { font-family: 'foo'; src: url(foo.ttf); }
+```
+
+```css
+@-moz-document url-prefix() {}
+```
+
+The following patterns are *not* considered warnings:
+
+```css
+a { background: url('x.jpg'); }
+```
+
+```css
+@import url("foo.css");
+```
+
+```css
+@document domain('http://www.w3.org/');
+```
+
+```css
+@font-face { font-family: "foo"; src: url("foo.ttf"); }
+```
+
+```css
+@-moz-document url-prefix('') {}
+```
+
+### `"never"`
+
+Urls *must never* be quoted.
+
+The following patterns are considered warnings:
+
+```css
+a { background: url('x.jpg'); }
+```
+
+```css
+@import url("foo.css");
+```
+
+```css
+@font-face { font-family: "foo"; src: url('foo.ttf'); }
+```
+
+The following patterns are *not* considered warnings:
+
+```css
+a { background: url(x.jpg); }
+```
+
+```css
+@import url(foo.css);
+```
+
+```css
+@font-face { font-family: 'foo'; src: url(foo.ttf); }
+```
+
+## Optional secondary options
+
+### `except: ["empty"]`
+
+Reverse the primary option if the function has no arguments.
+
+For example, with `"always"`.
+
+The following pattern is *not* considered warnings:
+
+```css
+@-moz-document url-prefix() {}
+```