解决chrome39兼容

src/polyfills.ts

@@ -13,6 +13,62 @@
  *
  * Learn more in https://angular.io/guide/browser-support
  */
+// Array.prototype.includes()兼容问题，2021年7月21日-seimin
+if (!Array.prototype.includes) {
+  Object.defineProperty(Array.prototype, "includes", {
+    value: function (valueToFind, fromIndex) {
+      if (this == null) {
+        throw new TypeError('"this" is null or not defined');
+      }
+
+      // 1. Let O be ? ToObject(this value).
+      var o = Object(this);
+
+      // 2. Let len be ? ToLength(? Get(O, "length")).
+      var len = o.length >>> 0;
+
+      // 3. If len is 0, return false.
+      if (len === 0) {
+        return false;
+      }
+
+      // 4. Let n be ? ToInteger(fromIndex).
+      //    (If fromIndex is undefined, this step produces the value 0.)
+      var n = fromIndex | 0;
+
+      // 5. If n ≥ 0, then
+      //  a. Let k be n.
+      // 6. Else n < 0,
+      //  a. Let k be len + n.
+      //  b. If k < 0, let k be 0.
+      var k = Math.max(n >= 0 ? n : len - Math.abs(n), 0);
+
+      function sameValueZero(x, y) {
+        return (
+          x === y ||
+          (typeof x === "number" &&
+            typeof y === "number" &&
+            isNaN(x) &&
+            isNaN(y))
+        );
+      }
+
+      // 7. Repeat, while k < len
+      while (k < len) {
+        // a. Let elementK be the result of ? Get(O, ! ToString(k)).
+        // b. If SameValueZero(valueToFind, elementK) is true, return true.
+        if (sameValueZero(o[k], valueToFind)) {
+          return true;
+        }
+        // c. Increase k by 1.
+        k++;
+      }
+
+      // 8. Return false
+      return false;
+    },
+  });
+}
 // (function () {
 //     Object.setPrototypeOf = Object.setPrototypeOf || ({ __proto__: [] } instanceof Array ? setProtoOf : mixinProperties);
 
@@ -179,9 +235,7 @@
  * APPLICATION IMPORTS
  */
 
-
-import 'zone.js/dist/zone';  // Included with Angular CLI.
-
+import "zone.js/dist/zone"; // Included with Angular CLI.
 
 // import 'babel-polyfill';