1 files changed, 65 insertions, 0 deletions
diff --git a/js/src/util/config.js b/js/src/util/config.js
new file mode 100644
index 000000000..a2b4bfba0
--- /dev/null
+++ b/js/src/util/config.js
@@ -0,0 +1,65 @@
+/**
+ * --------------------------------------------------------------------------
+ * Bootstrap util/config.js
+ * Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)
+ * --------------------------------------------------------------------------
+ */
+
+import Manipulator from '../dom/manipulator.js'
+import { isElement, toType } from './index.js'
+
+/**
+ * Class definition
+ */
+
+class Config {
+  // Getters
+  static get Default() {
+    return {}
+  }
+
+  static get DefaultType() {
+    return {}
+  }
+
+  static get NAME() {
+    throw new Error('You have to implement the static method "NAME", for each component!')
+  }
+
+  _getConfig(config) {
+    config = this._mergeConfigObj(config)
+    config = this._configAfterMerge(config)
+    this._typeCheckConfig(config)
+    return config
+  }
+
+  _configAfterMerge(config) {
+    return config
+  }
+
+  _mergeConfigObj(config, element) {
+    const jsonConfig = isElement(element) ? Manipulator.getDataAttribute(element, 'config') : {} // try to parse
+
+    return {
+      ...this.constructor.Default,
+      ...(typeof jsonConfig === 'object' ? jsonConfig : {}),
+      ...(isElement(element) ? Manipulator.getDataAttributes(element) : {}),
+      ...(typeof config === 'object' ? config : {})
+    }
+  }
+
+  _typeCheckConfig(config, configTypes = this.constructor.DefaultType) {
+    for (const [property, expectedTypes] of Object.entries(configTypes)) {
+      const value = config[property]
+      const valueType = isElement(value) ? 'element' : toType(value)
+
+      if (!new RegExp(expectedTypes).test(valueType)) {
+        throw new TypeError(
+          `${this.constructor.NAME.toUpperCase()}: Option "${property}" provided type "${valueType}" but expected type "${expectedTypes}".`
+        )
+      }
+    }
+  }
+}
+
+export default Config