diff --git a/package.json b/package.json
index fb52421..6363fc7 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "wkit",
-  "version": "1.10.8",
+  "version": "1.10.9",
   "type": "module",
   "description": "A library for building fast, lightweight web components.",
   "main": "dist/index.js",
diff --git a/src/html.js b/src/html.js
index 55cd9b0..32cb201 100644
--- a/src/html.js
+++ b/src/html.js
@@ -247,12 +247,12 @@ class Template {
 
 class TemplateInstance {
   constructor(template, parent) {
-    this._parts = []
-    this._$template = template
-    this._$parent = parent
+    this.$parts = []
+    this.$template = template
+    this.$parent = parent
   }
   get parentNode() {
-    return this._$parent.parentNode
+    return this.$parent.parentNode
   }
 
   #checkRef(node, walker, options) {
@@ -268,7 +268,7 @@ class TemplateInstance {
     let {
       el: { content },
       parts
-    } = this._$template
+    } = this.$template
 
     let fragment = document.importNode(content, true)
     let nodeIndex = 0
@@ -306,7 +306,7 @@ class TemplateInstance {
           } else if (templatePart.type === ELEMENT_PART) {
             part = new ElementPart(node, this, options)
           }
-          this._parts.push(part)
+          this.$parts.push(part)
           templatePart = parts[++partIndex]
         }
         if (
@@ -327,7 +327,7 @@ class TemplateInstance {
   }
   _update(values) {
     let i = 0
-    for (let part of this._parts) {
+    for (let part of this.$parts) {
       if (part !== void 0) {
         if (part.strings !== void 0) {
           part.$setValue(values, i)
@@ -345,26 +345,21 @@ class ChildPart {
   constructor(startNode, endNode, parent, options) {
     this.type = CHILD_PART
     this._$committedValue = NOTHING
-    this._$startNode = startNode
-    this._$endNode = endNode
-    this._$parent = parent
+    this.startNode = startNode
+    this.endNode = endNode
+    this.$parent = parent
     this.options = options
   }
 
   get parentNode() {
-    let parentNode = this._$startNode.parentNode
-    let parent = this._$parent
+    let parentNode = this.startNode.parentNode
+    let parent = this.$parent
     if (parent !== void 0 && parentNode.nodeType === 11) {
       parentNode = parent.parentNode
     }
     return parentNode
   }
-  get startNode() {
-    return this._$startNode
-  }
-  get endNode() {
-    return this._$endNode
-  }
+
   $setValue(value) {
     if (isPrimitive(value)) {
       if (value === NOTHING || value == null || value === '') {
@@ -385,8 +380,8 @@ class ChildPart {
       this._commitText(value)
     }
   }
-  _insert(node, target = this._$endNode) {
-    return this._$startNode.parentNode.insertBefore(node, target)
+  _insert(node, target = this.endNode) {
+    return this.startNode.parentNode.insertBefore(node, target)
   }
   _commitNode(value) {
     if (this._$committedValue !== value) {
@@ -399,7 +394,7 @@ class ChildPart {
       this._$committedValue !== NOTHING &&
       isPrimitive(this._$committedValue)
     ) {
-      let node = this._$startNode.nextSibling
+      let node = this.startNode.nextSibling
 
       node.data = value
     } else {
@@ -415,7 +410,7 @@ class ChildPart {
         : (type.el === void 0 && (type.el = Template.createElement(type.h)),
           type)
 
-    if (this._$committedValue?._$template === template) {
+    if (this._$committedValue?.$template === template) {
       this._$committedValue._update(values)
     } else {
       let instance = new TemplateInstance(template, this)
@@ -461,13 +456,13 @@ class ChildPart {
       partIndex++
     }
     if (partIndex < itemParts.length) {
-      this.#clear(itemPart && itemPart._$endNode.nextSibling, partIndex)
+      this.#clear(itemPart && itemPart.endNode.nextSibling, partIndex)
       itemParts.length = partIndex
     }
   }
 
-  #clear(start = this._$startNode.nextSibling, from) {
-    while (start && start !== this._$endNode) {
+  #clear(start = this.startNode.nextSibling, from) {
+    while (start && start !== this.endNode) {
       let node = start.nextSibling
       start.remove()
       start = node
@@ -482,7 +477,7 @@ class AttributePart {
     this.element = element
     this.name = name
     this.decorates = decorates
-    this._$parent = parent
+    this.$parent = parent
     this.options = options
     if (strings.length > 2 || strings[0] !== '' || strings[1] !== '') {
       this._$committedValue = new Array(strings.length - 1).fill(new String())
@@ -668,7 +663,7 @@ class ElementPart {
   constructor(element, parent, options) {
     this.element = element
     this.type = ELEMENT_PART
-    this._$parent = parent
+    this.$parent = parent
     this.options = options
   }
 
diff --git a/src/index.js b/src/index.js
index af2c50a..3316c42 100644
--- a/src/index.js
+++ b/src/index.js
@@ -21,7 +21,14 @@ import { render, html, svg, raw } from './html.js'
 import { animate, MODES } from './anim.js'
 import { nextTick, fire, bind, unbind, hyphen, camelize } from './utils.js'
 
-export { $, $$, offset, outsideClick, clearOutsideClick } from './utils.js'
+export {
+  $,
+  $$,
+  range,
+  offset,
+  outsideClick,
+  clearOutsideClick
+} from './utils.js'
 export { html, raw, css, svg, bind, unbind, nextTick, fire, hyphen, camelize }
 
 // 简单的类名解析
diff --git a/src/utils.js b/src/utils.js
index 3dae653..17b507b 100644
--- a/src/utils.js
+++ b/src/utils.js
@@ -43,6 +43,32 @@ export const nextTick = (function () {
   }
 })()
 
+export function range(...args) {
+  let start = 0,
+    end = 0,
+    step = 1,
+    out = []
+  switch (args.length) {
+    case 1:
+      end = args[0]
+      break
+    case 2:
+    case 3:
+      ;[start, end, step = 1] = args
+      step = Math.abs(step) || 1
+      break
+  }
+
+  if (start > end) {
+    ;[start, end] = [end, start]
+  }
+
+  for (let i = start; i < end; i += step) {
+    out.push(i)
+  }
+  return out
+}
+
 //驼峰转换为连字符线风格
 export function hyphen(target) {
   return target.replace(/([a-z\d])([A-Z]+)/g, '$1-$2').toLowerCase()