diff --git a/public/react/src/common/TextUtil.js b/public/react/src/common/TextUtil.js
new file mode 100644
index 00000000..f5dca6e5
--- /dev/null
+++ b/public/react/src/common/TextUtil.js
@@ -0,0 +1,36 @@
+import { bytesToSize } from 'educoder';
+export function isImageExtension(fileName) {
+    return fileName ? !!(fileName.match(/.(jpg|jpeg|png|gif)$/i)) : false
+}
+
+export function markdownToHTML(oldContent, selector) {
+    window.$('#md_div').html('')
+    // markdown to html
+    var markdwonParser = window.editormd.markdownToHTML("md_div", {
+        markdown: oldContent,
+        emoji: true,
+        htmlDecode: "style,script,iframe",  // you can filter tags decode
+        taskList: true,
+        tex: true,  // 默认不解析
+        flowChart: true,  // 默认不解析
+        sequenceDiagram: true // 默认不解析
+    });
+    const content = window.$('#md_div').html()
+    if (selector) {
+        window.$(selector).html(content)
+    }
+    return content
+}
+
+export function appendFileSizeToUploadFile(item) {
+    return `${item.title}${uploadNameSizeSeperator}${item.filesize}`
+}
+export function appendFileSizeToUploadFileAll(fileList) {
+    return fileList.map(item => {
+        if (item.name.indexOf(uploadNameSizeSeperator) == -1) {
+          return Object.assign({}, item, {name: `${item.name}${uploadNameSizeSeperator}${bytesToSize(item.size)}`})
+        } 
+        return item
+    }) 
+}
+export const uploadNameSizeSeperator = '　　'
\ No newline at end of file
diff --git a/public/react/src/common/educoder.js b/public/react/src/common/educoder.js
index e25ecb9d..7a5e5bc1 100644
--- a/public/react/src/common/educoder.js
+++ b/public/react/src/common/educoder.js
@@ -13,6 +13,8 @@ export { updatePageParams as updatePageParams } from                './RouterUti
 
 export { bytesToSize as bytesToSize } from                './UnitUtil';
 
+export { markdownToHTML, uploadNameSizeSeperator, appendFileSizeToUploadFile, appendFileSizeToUploadFileAll, isImageExtension } from 	'./TextUtil'
+
 export { handleDateString, getNextHalfHourOfMoment,formatDuring } from 	'./DateUtil'
 
 export { isDev as isDev } from 					'./Env'