--- /dev/null
+"use strict";
+
+const declarationValueIndex = require("../../utils/declarationValueIndex");
+const findAnimationName = require("../../utils/findAnimationName");
+const keywordSets = require("../../reference/keywordSets");
+const report = require("../../utils/report");
+const ruleMessages = require("../../utils/ruleMessages");
+const validateOptions = require("../../utils/validateOptions");
+
+const ruleName = "no-unknown-animations";
+
+const messages = ruleMessages(ruleName, {
+ rejected: animationName =>
+ `Unexpected unknown animation name "${animationName}"`
+});
+
+const rule = function(actual) {
+ return (root, result) => {
+ const validOptions = validateOptions(result, ruleName, { actual });
+ if (!validOptions) {
+ return;
+ }
+
+ const declaredAnimations = new Set();
+ root.walkAtRules(/(-(moz|webkit)-)?keyframes/i, atRule => {
+ declaredAnimations.add(atRule.params);
+ });
+
+ root.walkDecls(decl => {
+ if (
+ decl.prop.toLowerCase() === "animation" ||
+ decl.prop.toLowerCase() === "animation-name"
+ ) {
+ const animationNames = findAnimationName(decl.value);
+
+ if (animationNames.length === 0) {
+ return;
+ }
+
+ animationNames.forEach(animationNameNode => {
+ if (
+ keywordSets.animationNameKeywords.has(
+ animationNameNode.value.toLowerCase()
+ )
+ ) {
+ return;
+ }
+ if (declaredAnimations.has(animationNameNode.value)) {
+ return;
+ }
+
+ report({
+ result,
+ ruleName,
+ message: messages.rejected(animationNameNode.value),
+ node: decl,
+ index: declarationValueIndex(decl) + animationNameNode.sourceIndex
+ });
+ });
+ }
+ });
+ };
+};
+
+rule.ruleName = ruleName;
+rule.messages = messages;
+module.exports = rule;