Merge branch 'master' of github.com:ampproject/animations

compile/remove-empty-space.js

@@ -0,0 +1,48 @@
+/**
+ * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS-IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+const MagicString = require('magic-string');
+const walk = require('acorn-walk');
+
+export function removeEmptySpace() {
+  return {
+    name: 'remove-empty-space',
+    transform(code) {
+      const source = new MagicString(code);
+      const program = this.parse(code, { ranges: true });
+
+      walk.simple(program, {
+        TemplateLiteral(node) {
+          const [start, end] = node.range;
+          let literalValue = code.substring(start, end);
+          literalValue = literalValue
+            .replace(/\) \{/g, '){')
+            .replace(/, /g, ',')
+            .replace(/ = /g, '=')
+            .replace(/\t/g, '')
+            .replace(/[ ]{2,}/g, '')
+            .replace(/\n/g, '');
+          source.overwrite(start, end, literalValue);
+        },
+      });
+
+      return {
+        code: source.toString(),
+        map: source.generateMap(),
+      };
+    },
+  };
+}