feat: add basic spread implementation

Author: streamich

addon/spread.js

@@ -0,0 +1,23 @@
+'use strict';
+
+exports.addon = function (renderer) {
+    if (process.env.NODE_ENV !== 'production') {
+        require('./__dev__/warnOnMissingDependencies')('spread', renderer, ['put']);
+    }
+
+    renderer.spread = function (css, block) {
+        block = block || renderer.hash(css);
+        block = renderer.pfx + block;
+        renderer.put('.' + block + ',[data-' + block + ']', css);
+
+        var spread = {
+            toString: function () {
+                return ' ' + block;
+            }
+        };
+
+        spread['data-' + block] = '';
+
+        return spread;
+    };
+};