draft

node_modules/cssstyle/lib/properties/backgroundAttachment.js

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+'use strict';
+
+var parsers = require('../parsers');
+
+var isValid = module.exports.isValid = function isValid(v) {
+    return parsers.valueType(v) === parsers.TYPES.KEYWORD &&
+        (v.toLowerCase() === 'scroll' || v.toLowerCase() === 'fixed' || v.toLowerCase() === 'inherit');
+};
+
+module.exports.definition = {
+    set: function (v) {
+        if (!isValid(v)) {
+            return;
+        }
+        this._setProperty('background-attachment', v);
+    },
+    get: function () {
+        return this.getPropertyValue('background-attachment');
+    },
+    enumerable: true,
+    configurable: true
+};