diff --git a/src/components/tool/unit_conversion/DataUnitConversion.vue b/src/components/tool/unit_conversion/DataUnitConversion.vue
index 8b3d574..849fbb9 100644
--- a/src/components/tool/unit_conversion/DataUnitConversion.vue
+++ b/src/components/tool/unit_conversion/DataUnitConversion.vue
@@ -1,53 +1,86 @@
-<script setup lang="ts">
-import { computed, ref } from 'vue'
+<script setup>
+import { computed, ref } from 'vue';
 import BigNumber from "bignumber.js";
 
-const unitToByte: { [name: string]: number } = {
-  "unit-k-byte": 1000,
-  "unit-m-byte": 1000 * 1000,
-  "unit-g-byte": 1000 * 1000 * 1000,
-  "unit-t-byte": 1000 * 1000 * 1000 * 1000,
-  "unit-ki-byte": 1024,
-  "unit-mi-byte": 1024 * 1024,
-  "unit-gi-byte": 1024 * 1024 * 1024,
-  "unit-ti-byte": 1024 * 1024 * 1024 * 1024,
-  "unit-byte": 1,
-  "unit-bit": 1 / 8,
-  "unit-k-bit": 1000 / 8,
-  "unit-m-bit": 1000000 / 8,
-  "unit-g-bit": 1000000000 / 8,
-  "unit-t-bit": 1000000000000 / 8,
-}
+/**
+ * @typedef {string} UnitNameStr
+ */
 
-let variable: { [name: keyof typeof unitToByte]: string } = {
-  "unit-k-byte": '',
-  "unit-m-byte": '',
-  "unit-g-byte": '',
-  "unit-t-byte": '',
-  "unit-ki-byte": '',
-  "unit-mi-byte": '',
-  "unit-gi-byte": '',
-  "unit-ti-byte": '',
-  "unit-byte": '',
-  "unit-bit": '',
-  "unit-k-bit": '',
-  "unit-m-bit": '',
-  "unit-g-bit": '',
-  "unit-t-bit": '',
-}
+/**
+ * @enum {UnitNameStr}
+ */
+const UnitName = Object.freeze({
+  KBYTE: "unit-k-byte",
+  MBYTE: "unit-m-byte",
+  GBYTE: "unit-g-byte",
+  TBYTE: "unit-t-byte",
+  KIBYTE: "unit-ki-byte",
+  MIBYTE: "unit-mi-byte",
+  GIBYTE: "unit-gi-byte",
+  TIBYTE: "unit-ti-byte",
+  BYTE: "unit-byte",
+  BIT: "unit-bit",
+  KBIT: "unit-k-bit",
+  MBIT: "unit-m-bit",
+  GBIT: "unit-g-bit",
+  TBIT: "unit-t-bit",
+})
 
-const size = ref(variable);
+/**
+ * @enum {number}
+ */
+const UnitNameToSize = Object.freeze({
+  [UnitName.KBYTE]: 1000,
+  [UnitName.MBYTE]: 1000 * 1000,
+  [UnitName.GBYTE]: 1000 * 1000 * 1000,
+  [UnitName.TBYTE]: 1000 * 1000 * 1000 * 1000,
+  [UnitName.KIBYTE]: 1024,
+  [UnitName.MIBYTE]: 1024 * 1024,
+  [UnitName.GIBYTE]: 1024 * 1024 * 1024,
+  [UnitName.TIBYTE]: 1024 * 1024 * 1024 * 1024,
+  [UnitName.BYTE]: 1,
+  [UnitName.BIT]: 1 / 8,
+  [UnitName.KBIT]: 1000 / 8,
+  [UnitName.MBIT]: 1000000 / 8,
+  [UnitName.GBIT]: 1000000000 / 8,
+  [UnitName.TBIT]: 1000000000000 / 8,
+});
 
-function sizeChanged(unitName: keyof typeof unitToByte):void {
-  let result: { [name in keyof typeof unitToByte]: string } = Object();
+const size = ref({
+  [UnitName.KBYTE]: '',
+  [UnitName.MBYTE]: '',
+  [UnitName.GBYTE]: '',
+  [UnitName.TBYTE]: '',
+  [UnitName.KIBYTE]: '',
+  [UnitName.MIBYTE]: '',
+  [UnitName.GIBYTE]: '',
+  [UnitName.TIBYTE]: '',
+  [UnitName.BYTE]: '',
+  [UnitName.BIT]: '',
+  [UnitName.KBIT]: '',
+  [UnitName.MBIT]: '',
+  [UnitName.GBIT]: '',
+  [UnitName.TBIT]: '',
+});
+
+/**
+ * Change ref variable when user inputs some characters.
+ * @param {UnitNameStr} unitName 
+ * @returns {void}
+ */
+function sizeChanged(unitName) {
+  /**
+   * @type {object.<UnitNameStr, string>}
+   */
+  let result = {};
   // assign 0 to current input if nothing is passed
   if (size.value[unitName].length === 0) result[unitName] = '0';
-  let inputedBytes: BigNumber = new BigNumber(unitToByte[unitName]).multipliedBy(size.value[unitName]);
-  for (const key in unitToByte) {
-    result[key] = inputedBytes.div(unitToByte[key]).toString();
+  let inputedBytes = new BigNumber(UnitNameToSize[unitName]).multipliedBy(size.value[unitName]);
+  for (const key in UnitNameToSize) {
+    result[key] = inputedBytes.div(UnitNameToSize[key]).toString();
   }
   result[unitName] = size.value[unitName];
-  for (const key in unitToByte) {
+  for (const key in UnitNameToSize) {
     if (result[key] !== 'NaN') {
       size.value[key] = result[key];
     } else if (result[key] === 'NaN') {
@@ -57,7 +90,7 @@ function sizeChanged(unitName: keyof typeof unitToByte):void {
 }
 
 const isMultipleOf4KiB = computed(() => {
-  let userInput: BigNumber = new BigNumber(size.value["unit-ki-byte"])
+  let userInput = new BigNumber(size.value[UnitName.KIBYTE]);
   if (userInput.toNumber() === 0) return false;
   return userInput.mod(4).toNumber() === 0 ? true : false;
 })
@@ -68,80 +101,82 @@ const isMultipleOf4KiB = computed(() => {
   <div class="unit-conversion-computation-area 1000-in-byte">
     <p>1000 进制并以 Byte 计: </p>
     <div class="unit-conversion-computation-node">
-      <input class="size-text" id="unit-k-byte" type="text" v-model="size['unit-k-byte']"
-        @input="sizeChanged('unit-k-byte')">
+      <input class="size-text" :id="UnitName.KBYTE" type="text" v-model="size[UnitName.KBYTE]"
+        @input="sizeChanged(UnitName.KBYTE)">
       <span class="unit-name">KB</span>
     </div>
     <div class="unit-conversion-computation-node">
-      <input class="size-text" id="unit-m-byte" type="text" v-model="size['unit-m-byte']"
-        @input="sizeChanged('unit-m-byte')">
+      <input class="size-text" :id="UnitName.MBYTE" type="text" v-model="size[UnitName.MBYTE]"
+        @input="sizeChanged(UnitName.MBYTE)">
       <span class="unit-name">MB</span>
     </div>
     <div class="unit-conversion-computation-node">
-      <input class="size-text" id="unit-g-byte" type="text" v-model="size['unit-g-byte']"
-        @input="sizeChanged('unit-g-byte')">
+      <input class="size-text" :id="UnitName.GBYTE" type="text" v-model="size[UnitName.GBYTE]"
+        @input="sizeChanged(UnitName.GBYTE)">
       <span class="unit-name">GB</span>
     </div>
     <div class="unit-conversion-computation-node">
-      <input class="size-text" id="unit-t-byte" type="text" v-model="size['unit-t-byte']"
-        @input="sizeChanged('unit-t-byte')">
+      <input class="size-text" :id="UnitName.TBYTE" type="text" v-model="size[UnitName.TBYTE]"
+        @input="sizeChanged(UnitName.TBYTE)">
       <span class="unit-name">TB</span>
     </div>
   </div>
   <div class="unit-conversion-computation-area 1024-in-byte">
     <p>1024 进制并以 Byte 计</p>
     <div class="unit-conversion-computation-node">
-      <input class="size-text" id="unit-ki-byte" type="text" v-model="size['unit-ki-byte']"
-        @input="sizeChanged('unit-ki-byte')">
+      <input class="size-text" :id="UnitName.KIBYTE" type="text" v-model="size[UnitName.KIBYTE]"
+        @input="sizeChanged(UnitName.KIBYTE)">
       <span class="unit-name">KiB</span>
     </div>
     <div class="unit-conversion-computation-node">
-      <input class="size-text" id="unit-mi-byte" type="text" v-model="size['unit-mi-byte']"
-        @input="sizeChanged('unit-mi-byte')">
+      <input class="size-text" :id="UnitName.MIBYTE" type="text" v-model="size[UnitName.MIBYTE]"
+        @input="sizeChanged(UnitName.MIBYTE)">
       <span class="unit-name">MiB</span>
     </div>
     <div class="unit-conversion-computation-node">
-      <input class="size-text" id="unit-gi-byte" type="text" v-model="size['unit-gi-byte']"
-        @input="sizeChanged('unit-gi-byte')">
+      <input class="size-text" :id="UnitName.GIBYTE" type="text" v-model="size[UnitName.GIBYTE]"
+        @input="sizeChanged(UnitName.GIBYTE)">
       <span class="unit-name">GiB</span>
     </div>
     <div class="unit-conversion-computation-node">
-      <input class="size-text" id="unit-ti-byte" type="text" v-model="size['unit-ti-byte']"
-        @input="sizeChanged('unit-ti-byte')">
+      <input class="size-text" :id="UnitName.TIBYTE" type="text" v-model="size[UnitName.TIBYTE]"
+        @input="sizeChanged(UnitName.TIBYTE)">
       <span class="unit-name">TiB</span>
     </div>
   </div>
   <div class="unit-conversion-computation-area byte-bit">
     <p>以 Byte (B) / bit (b) 计:</p>
     <div class="unit-conversion-computation-node">
-      <input class="size-text" id="unit-byte" type="text" v-model="size['unit-byte']" @input="sizeChanged('unit-byte')">
+      <input class="size-text" :id="UnitName.BYTE" type="text" v-model="size[UnitName.BYTE]"
+        @input="sizeChanged(UnitName.BYTE)">
       <span class="unit-name">B</span>
     </div>
     <div class="unit-conversion-computation-node">
-      <input class="size-text" id="unit-bit" type="text" v-model="size['unit-bit']" @input="sizeChanged('unit-bit')">
+      <input class="size-text" :id="UnitName.BIT" type="text" v-model="size[UnitName.BIT]"
+        @input="sizeChanged(UnitName.BIT)">
       <span class="unit-name">b</span>
     </div>
   </div>
   <div class="unit-conversion-computation-area 1000-in-bit">
     <p>1000 进制并以 bit 计:</p>
     <div class="unit-conversion-computation-node">
-      <input class="size-text" id="unit-k-bit" type="text" v-model="size['unit-k-bit']"
-        @input="sizeChanged('unit-k-bit')">
+      <input class="size-text" :id="UnitName.KBIT" type="text" v-model="size[UnitName.KBIT]"
+        @input="sizeChanged(UnitName.KBIT)">
       <span class="unit-name">Kb</span>
     </div>
     <div class="unit-conversion-computation-node">
-      <input class="size-text" id="unit-m-bit" type="text" v-model="size['unit-m-bit']"
-        @input="sizeChanged('unit-m-bit')">
+      <input class="size-text" :id="UnitName.MBIT" type="text" v-model="size[UnitName.MBIT]"
+        @input="sizeChanged(UnitName.MBIT)">
       <span class="unit-name">Mb</span>
     </div>
     <div class="unit-conversion-computation-node">
-      <input class="size-text" id="unit-g-bit" type="text" v-model="size['unit-g-bit']"
-        @input="sizeChanged('unit-g-bit')">
+      <input class="size-text" :id="UnitName.GBIT" type="text" v-model="size[UnitName.GBIT]"
+        @input="sizeChanged(UnitName.GBIT)">
       <span class="unit-name">Gb</span>
     </div>
     <div class="unit-conversion-computation-node">
-      <input class="size-text" id="unit-t-bit" type="text" v-model="size['unit-t-bit']"
-        @input="sizeChanged('unit-t-bit')">
+      <input class="size-text" :id="UnitName.TBIT" type="text" v-model="size[UnitName.TBIT]"
+        @input="sizeChanged(UnitName.TBIT)">
       <span class="unit-name">Tb</span>
     </div>
   </div>