🎉 Initial commit

mod.js

@@ -0,0 +1,44 @@
+/**
+ * @param   {String|{string: String, start: Number, deleteCount: Number|undefined, item: String|undefined}} arg
+ * @param   {Number} [start]
+ * @param   {Number} [deleteCount]
+ * @param   {String} [item]
+ * @returns {String}
+ */
+const stringSplice = (
+    arg,
+    start,
+    deleteCount,
+    item
+) => {
+    const
+        _string = (typeof arg === 'string' ? arg : arg.string).split(''),
+        _start = arg.start || start,
+        _deleteCount = arg.deleteCount || deleteCount,
+        _item = arg.item || item;
+    _string.splice(_start, _deleteCount, _item);
+    return _string.join('');
+};
+
+/**
+ * @param   {String} string
+ * @param   {{start: Number, deleteCount: Number|undefined, item: String|undefined}[]} items
+ * @returns {String}
+ */
+const stringSpliceMulti = (string, items) => {
+    let n = 0;
+    for(
+        const { start, deleteCount, item }
+        of items.sort((a, b) => a.start - b.start)
+    ){
+        string = stringSplice(string, start + n, deleteCount, item);
+        n += item?.length || 0;
+        n -= deleteCount  || 0;
+    }
+    return string;
+};
+
+export {
+    stringSplice,
+    stringSpliceMulti
+};

package.json

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+{
+  "name": "strsplice",
+  "version": "0.1.0",
+  "main": "mod.js",
+  "repository": "ssh://kaki@git.kaki87.net:3021/KaKi87/strsplice.git",
+  "author": "KaKi87 <KaKi87@pm.me>",
+  "license": "MIT",
+  "type": "module"
+}