draft

node_modules/cssstyle/lib/properties/borderSpacing.js

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+'use strict';
+
+var parsers = require('../parsers');
+
+// <length> <length>? | inherit
+// if one, it applies to both horizontal and verical spacing
+// if two, the first applies to the horizontal and the second applies to vertical spacing
+
+var parse = function parse(v) {
+    if (v === '' || v === null) {
+        return undefined;
+    }
+    if (v.toLowerCase() === 'inherit') {
+        return v;
+    }
+    var parts = v.split(/\s+/);
+    if (parts.length !== 1 && parts.length !== 2) {
+        return undefined;
+    }
+    parts.forEach(function (part) {
+        if (parsers.valueType(part) !== parsers.TYPES.LENGTH) {
+            return undefined;
+        }
+    });
+
+    return v;
+};
+
+module.exports.isValid = function isValid(v) {
+    return parse(v) !== undefined;
+};
+
+module.exports.definition = {
+    set: function (v) {
+        this._setProperty('border-spacing', parse(v));
+    },
+    get: function () {
+        return this.getPropertyValue('border-spacing');
+    },
+    enumerable: true,
+    configurable: true
+};