Move combineCallbacks to its own module (#3963)

Author: DmitrySharabin

src/plugins/line-highlight/prism-line-highlight.ts

@@ -1,5 +1,5 @@
 import { isActive } from '../../shared/dom-util';
-import { combineCallbacks } from '../../shared/hooks-util';
+import { combineCallbacks } from '../../util/combine-callbacks';
 import { lazy, noop } from '../../shared/util';
 import type { Prism } from '../../core';
 import type { PluginProto } from '../../types';

src/plugins/line-numbers/prism-line-numbers.ts

@@ -1,5 +1,5 @@
 import { getParentPre, isActive } from '../../shared/dom-util';
-import { combineCallbacks } from '../../shared/hooks-util';
+import { combineCallbacks } from '../../util/combine-callbacks';
 import { isNonNull, noop } from '../../shared/util';
 import type { PluginProto } from '../../types';
 

src/shared/hooks-util.ts

@@ -1,16 +1,6 @@
+import { combineCallbacks } from '../util/combine-callbacks';
 import type { HookCallback, HookEnvMap, Hooks } from '../core/hooks';
 
-/**
- * Returns a single function that calls all the given functions.
- */
-export function combineCallbacks (...callbacks: (() => void)[]): () => void {
-	return () => {
-		for (const callback of callbacks) {
-			callback();
-		}
-	};
-}
-
 /**
  * TODO: Add description
  */

src/util/combine-callbacks.ts

@@ -0,0 +1,10 @@
+/**
+ * Returns a single function that calls all the given functions.
+ */
+export function combineCallbacks (...callbacks: (() => void)[]): () => void {
+	return () => {
+		for (const callback of callbacks) {
+			callback();
+		}
+	};
+}