main repo

node_modules/use-callback-ref/dist/es5/useRef.js

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+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.useCallbackRef = void 0;
+var react_1 = require("react");
+/**
+ * creates a MutableRef with ref change callback
+ * @param initialValue - initial ref value
+ * @param {Function} callback - a callback to run when value changes
+ *
+ * @example
+ * const ref = useCallbackRef(0, (newValue, oldValue) => console.log(oldValue, '->', newValue);
+ * ref.current = 1;
+ * // prints 0 -> 1
+ *
+ * @see https://reactjs.org/docs/hooks-reference.html#useref
+ * @see https://github.com/theKashey/use-callback-ref#usecallbackref---to-replace-reactuseref
+ * @returns {MutableRefObject}
+ */
+function useCallbackRef(initialValue, callback) {
+    var ref = (0, react_1.useState)(function () { return ({
+        // value
+        value: initialValue,
+        // last callback
+        callback: callback,
+        // "memoized" public interface
+        facade: {
+            get current() {
+                return ref.value;
+            },
+            set current(value) {
+                var last = ref.value;
+                if (last !== value) {
+                    ref.value = value;
+                    ref.callback(value, last);
+                }
+            },
+        },
+    }); })[0];
+    // update callback
+    ref.callback = callback;
+    return ref.facade;
+}
+exports.useCallbackRef = useCallbackRef;