1 files changed, 55 insertions, 0 deletions
diff --git a/node_modules/webpack-chain/src/ChainedSet.js b/node_modules/webpack-chain/src/ChainedSet.js
new file mode 100644
index 00000000..ea469daa
--- /dev/null
+++ b/node_modules/webpack-chain/src/ChainedSet.js
@@ -0,0 +1,55 @@
+const Chainable = require('./Chainable');
+
+module.exports = class extends Chainable {
+  constructor(parent) {
+    super(parent);
+    this.store = new Set();
+  }
+
+  add(value) {
+    this.store.add(value);
+    return this;
+  }
+
+  prepend(value) {
+    this.store = new Set([value, ...this.store]);
+    return this;
+  }
+
+  clear() {
+    this.store.clear();
+    return this;
+  }
+
+  delete(value) {
+    this.store.delete(value);
+    return this;
+  }
+
+  values() {
+    return [...this.store];
+  }
+
+  has(value) {
+    return this.store.has(value);
+  }
+
+  merge(arr) {
+    this.store = new Set([...this.store, ...arr]);
+    return this;
+  }
+
+  when(
+    condition,
+    whenTruthy = Function.prototype,
+    whenFalsy = Function.prototype
+  ) {
+    if (condition) {
+      whenTruthy(this);
+    } else {
+      whenFalsy(this);
+    }
+
+    return this;
+  }
+};