diff --git a/src/index.ts b/src/index.ts
index a1eefea..b1082d8 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -1,11 +1,31 @@
-export default function (nodeClass: string) {
-  const nodes = document.querySelectorAll(`.${nodeClass}`)
+export default function (selectedNode: string, spacing: number = 10) {
+  let spacingCharacter = ''
+  switch (spacing) {
+    case 3:
+      spacingCharacter = '\u2004'
+      break
+    case 4:
+      spacingCharacter = '\u2005'
+      break
+    case 5:
+      spacingCharacter = '\u2009'
+      break
+    case 6:
+      spacingCharacter = '\u2006'
+      break
+    case 10:
+      spacingCharacter = '\u200A'
+      break
+    default:
+      spacingCharacter = '\u2006'
+  }
+  const nodes = document.querySelectorAll(`${selectedNode}`)
   for (let i in nodes) {
-    processText(nodes[i])
+    processText(nodes[i], spacingCharacter)
   }
 }
 
-function processText(node: Node): void {
+function processText(node: Node, spacingCharacter: string): void {
   if (node.nodeType === Node.TEXT_NODE) {
     // detect the characters includes chinese and english, or japanese (kanji or kana) and english
     const reg = /[\u4e00-\u9fa5\u3040-\u30FF][a-zA-Z]|\w[\u4e00-\u9fa5\u3040-\u30FF]|\w[a-zA-Z]/
@@ -20,18 +40,16 @@ function processText(node: Node): void {
         const english_and_number = /[a-zA-Z0-9]/
         // if the char is chinese or japanese (kanji or kana)
         if (cnchar_and_kanji.test(textArr[i]) || kana.test(textArr[i])) {
-          console.log(`textArr[i]: ${textArr[i]}`)
           // if next char is english
           if (/[a-zA-Z]/.test(textArr[i + 1])) {
-            console.log(`textArr[i + 1]: ${textArr[i + 1]}`)
             // 1/8 em space
-            newText += textArr[i] + '\u2009'
+            newText += textArr[i] + spacingCharacter
           } else {
             newText += textArr[i]
           }
         } else if (english_and_number.test(textArr[i])) {
           if (cnchar_and_kanji.test(textArr[i + 1]) || kana.test(textArr[i + 1])) {
-            newText += textArr[i] + '\u2009'
+            newText += textArr[i] + spacingCharacter
           } else {
             newText += textArr[i]
           }
@@ -44,7 +62,6 @@ function processText(node: Node): void {
     }
   } else {
     if (!node.nodeName) return
-    console.log(node.nodeName)
-    for (let i = 0; i < node.childNodes.length; i++) processText(node.childNodes[i])
+    for (let i = 0; i < node.childNodes.length; i++) processText(node.childNodes[i], spacingCharacter)
   }
 }