postcss,(plugins): nanocss, postcss-preset-env

1 files changed, 50 insertions, 0 deletions

diff --git a/node_modules/csso/lib/replace/property/background.js b/node_modules/csso/lib/replace/property/background.js
new file mode 100644
index 00000000..847a8cff
--- /dev/null
+++ b/node_modules/csso/lib/replace/property/background.js
@@ -0,0 +1,50 @@
+import { List } from 'css-tree';
+
+export default function compressBackground(node) {
+    function flush() {
+        if (!buffer.length) {
+            buffer.unshift(
+                {
+                    type: 'Number',
+                    loc: null,
+                    value: '0'
+                },
+                {
+                    type: 'Number',
+                    loc: null,
+                    value: '0'
+                }
+            );
+        }
+
+        newValue.push.apply(newValue, buffer);
+
+        buffer = [];
+    }
+
+    let newValue = [];
+    let buffer = [];
+
+    node.children.forEach((node) => {
+        if (node.type === 'Operator' && node.value === ',') {
+            flush();
+            newValue.push(node);
+            return;
+        }
+
+        // remove defaults
+        if (node.type === 'Identifier') {
+            if (node.name === 'transparent' ||
+                node.name === 'none' ||
+                node.name === 'repeat' ||
+                node.name === 'scroll') {
+                return;
+            }
+        }
+
+        buffer.push(node);
+    });
+
+    flush();
+    node.children = new List().fromArray(newValue);
+};