--- /dev/null
+"use strict";
+
+const _ = require("lodash");
+const isCustomProperty = require("../../utils/isCustomProperty");
+const isStandardSyntaxDeclaration = require("../../utils/isStandardSyntaxDeclaration");
+const isStandardSyntaxProperty = require("../../utils/isStandardSyntaxProperty");
+const optionsMatches = require("../../utils/optionsMatches");
+const postcss = require("postcss");
+const properties = require("known-css-properties").all;
+const report = require("../../utils/report");
+const ruleMessages = require("../../utils/ruleMessages");
+const validateOptions = require("../../utils/validateOptions");
+
+const ruleName = "property-no-unknown";
+
+const messages = ruleMessages(ruleName, {
+ rejected: property => `Unexpected unknown property "${property}"`
+});
+
+const rule = function(actual, options) {
+ return (root, result) => {
+ const validOptions = validateOptions(
+ result,
+ ruleName,
+ { actual },
+ {
+ actual: options,
+ possible: {
+ ignoreProperties: [_.isString],
+ checkPrefixed: _.isBoolean
+ },
+ optional: true
+ }
+ );
+
+ if (!validOptions) {
+ return;
+ }
+
+ const shouldCheckPrefixed = _.get(options, "checkPrefixed");
+
+ root.walkDecls(decl => {
+ const prop = decl.prop;
+
+ if (!isStandardSyntaxProperty(prop)) {
+ return;
+ }
+ if (!isStandardSyntaxDeclaration(decl)) {
+ return;
+ }
+ if (isCustomProperty(prop)) {
+ return;
+ }
+
+ if (!shouldCheckPrefixed && postcss.vendor.prefix(prop)) {
+ return;
+ }
+
+ if (optionsMatches(options, "ignoreProperties", prop)) {
+ return;
+ }
+
+ if (properties.indexOf(prop.toLowerCase()) !== -1) {
+ return;
+ }
+
+ report({
+ message: messages.rejected(prop),
+ node: decl,
+ result,
+ ruleName
+ });
+ });
+ };
+};
+
+rule.ruleName = ruleName;
+rule.messages = messages;
+module.exports = rule;