diff --git a/src/editor/index.js b/src/editor/index.js
index 045a68a..66345ec 100644
--- a/src/editor/index.js
+++ b/src/editor/index.js
@@ -511,6 +511,10 @@ class Editor extends Component {
     let txt = ev.clipboardData.getData('text/plain')
     let items = ev.clipboardData.items
 
+    if (this.readOnly || this.disabled) {
+      return
+    }
+
     // 先文件判断, 避免右键单击复制图片时, 当成html处理
     if (items && items.length) {
       let blob = null
diff --git a/src/markd/core.js b/src/markd/core.js
index f70bdc3..4cb4b42 100644
--- a/src/markd/core.js
+++ b/src/markd/core.js
@@ -594,7 +594,7 @@ class Tool {
 
           // 引用结束
           if (isBlockquote) {
-            if (emptyLineLength > 1) {
+            if (emptyLineLength > 0) {
               isBlockquote = false
               emptyLineLength = 0
               while (blockquoteLevel > 0) {
diff --git a/src/markd/index.js b/src/markd/index.js
index cbe5930..74c7fc5 100644
--- a/src/markd/index.js
+++ b/src/markd/index.js
@@ -10,6 +10,8 @@ import md2html from './core.js'
 import '../code/index.js'
 import '../form/checkbox.js'
 
+export default md2html
+
 class Markd extends Component {
   static props = {
     code: { type: String, default: '', attribute: false }
diff --git a/src/meditor/addon.js b/src/meditor/addon.js
index b9b89d7..babfe65 100644
--- a/src/meditor/addon.js
+++ b/src/meditor/addon.js
@@ -124,18 +124,15 @@ export default {
   },
 
   fullscreen(elem) {
-    //
-    this.props.fullscreen = !this.props.fullscreen
-    if (this.props.fullscreen) {
-      this.setAttribute('fullscreen', '')
-    } else {
-      this.removeAttribute('fullscreen')
-    }
-    elem.classList.toggle('active', this.props.fullscreen)
+    this.classList.toggle('fullscreen')
+    elem.classList.toggle('active')
   },
   preview(elem) {
-    this.state.preview = !this.state.preview
-    this.__VIEW__.classList.toggle('active', this.state.preview)
-    elem.classList.toggle('active', this.state.preview)
+    this.previewEnabled = !this.previewEnabled
+    this.$refs.view.classList.toggle('active')
+    elem.classList.toggle('active')
+    if (this.previewEnabled) {
+      this.$refs.view.code = this.value
+    }
   }
 }
diff --git a/src/meditor/helper.js b/src/meditor/helper.js
index b2c33c7..d133522 100644
--- a/src/meditor/helper.js
+++ b/src/meditor/helper.js
@@ -16,17 +16,17 @@ const ELEMS = {
 
     href = (href && href[1]) || null
     title = (title && title[1]) || null
-    tar = (tar && tar[1]) || '_self'
+    tar = tar && tar[1]
 
     if (!href) {
       return inner || href
     }
 
-    href = href.replace('viod(0)', '')
-    attrs = `target=${tar}`
+    href = href.replace('viod(0)', '').replaceAll('&', '&')
+    attrs = tar ? `target=${tar}` : ''
     attrs += title ? `;title=${title}` : ''
 
-    return `[${inner || href}](${href} "${attrs}")`
+    return `[${inner || href}](${href}${attrs ? ` "${attrs}"` : ''})`
   },
   em: function (str, attr, inner) {
     return (inner && '_' + inner + '_') || ''
@@ -134,10 +134,10 @@ export function renderToolbar(list = [], dict = {}, showText = false) {
     let title = showText ? '' : dict[it]
     let text = showText ? dict[it] || '' : ''
 
-    return html`<section data-act=${it} title=${title}>
+    return html`<span data-act=${it} title=${title}>
       <svg class="icon" viewBox="0 0 1024 1024"><path d=${ICONS[it]} /></svg>
       ${text}
-    </section>`
+    </span>`
   })
 }
 
@@ -151,11 +151,19 @@ export function html2md(str) {
 
   str = str
     .replace(/\t/g, '  ')
-    .replace(/<meta [^>]*>/, '')
+    .replace(/<\/?(meta|link|script)[^>]*?>/g, '')
+    .replace(/<!--[\w\W]*?-->/g, '')
+    .replace(/<xml[^>]*?>[\w\W]*?<\/xml>/g, '')
+    .replace(/<style>[\w\W]*?<\/style>/g, '')
     .replace(attrExp('class', 'g'), '')
     .replace(attrExp('style', 'g'), '')
+    .replace(/<a[^>]*? href\s?=\s?["']?([^"']*)["']?[^>]*?>/g, '<a href="$1">')
+    .replace(
+      /<img[^>]*? src\s?=\s?["']?([^"']*)["']?[^>]*?>/g,
+      '<img src="$1">'
+    )
     .replace(/<(?!a |img )(\w+) [^>]*>/g, '<$1>')
-    .replace(/<svg[^>]*>.*?<\/svg>/g, '{invalid image}')
+    .replace(/<svg[^>]*>.*?<\/svg>/g, '{svg not support}')
 
   // log(str)
   for (let i in ELEMS) {
diff --git a/src/meditor/index.js b/src/meditor/index.js
index fe0b455..4ad1250 100644
--- a/src/meditor/index.js
+++ b/src/meditor/index.js
@@ -18,10 +18,13 @@ import {
   clearOutsideClick
 } from 'wkit'
 
-import { renderToolbar, DEFAULT_TOOLS } from './helper.js'
+import { renderToolbar, DEFAULT_TOOLS, html2md } from './helper.js'
+import Addon from './addon.js'
+import markd from '../markd/index.js'
 
 import '../form/input.js'
 import '../form/button.js'
+import '../code/index.js'
 
 const COLORS = [
   '#f3f5fb',
@@ -113,7 +116,7 @@ class MEditor extends Component {
         line-height: 24px;
         border-bottom: 1px solid var(--color-grey-1);
 
-        section {
+        span {
           position: relative;
           overflow: hidden;
           display: flex;
@@ -415,7 +418,12 @@ class MEditor extends Component {
 
   set value(val) {
     if (this.$refs.editor) {
+      if (this.$refs.editor.value === val) {
+        return
+      }
       this.$refs.editor.value = val
+      this.#updatePreview()
+      this.$emit('input')
     } else {
       nextTick(_ => (this.value = val))
     }
@@ -429,6 +437,8 @@ class MEditor extends Component {
 
   #select = null
 
+  previewEnabled = false
+
   __init__() {
     //
     let { outer, inner, thumb } = this.$refs
@@ -476,7 +486,7 @@ class MEditor extends Component {
   }
 
   // 处理图片
-  #handleImage(ev, file) {
+  #handleFile(ev, file, t = '!') {
     if (ev && ev.type === 'change') {
       file = ev.target.files[0]
       ev.target.value = ''
@@ -486,14 +496,7 @@ class MEditor extends Component {
         file,
         send: link => {
           this.$refs.editor.focus()
-          this.restoreSelection()
-          this.exec(ACTTION.image, link)
-          this.saveSelection()
-
-          //  修正插入的图片,宽度不得超出容器
-          this.$refs.editor.querySelectorAll('img').forEach(_ => {
-            _.style.maxWidth = '100%'
-          })
+          this.insert(`${t}[${file.name}](${link})`)
         }
       }
     })
@@ -504,52 +507,50 @@ class MEditor extends Component {
     let txt = ev.clipboardData.getData('text/plain')
     let items = ev.clipboardData.items
 
+    if (this.readOnly || this.disabled) {
+      return
+    }
+
     // 先文件判断, 避免右键单击复制图片时, 当成html处理
     if (items && items.length) {
-      let blob = null
+      let file = null
+
       for (let it of items) {
-        if (it.type.indexOf('image') > -1) {
-          blob = it.getAsFile()
+        file = it.getAsFile()
+        if (file) {
+          break
         }
       }
 
-      if (blob) {
-        return this.#handleImage(null, blob)
+      if (file) {
+        return this.#handleFile(
+          null,
+          file,
+          file.type.includes('image') ? '!' : ''
+        )
       }
     }
 
     if (html) {
-      html = html
-        .replace(/\t/g, '  ')
-        .replace(/<\/?(meta|link|script)[^>]*?>/g, '')
-        .replace(/<!--[\w\W]*?-->/g, '')
-        .replace(
-          /<a[^>]*? href\s?=\s?["']?([^"']*)["']?[^>]*?>/g,
-          '<a href="$1">'
-        )
-        .replace(
-          /<img[^>]*? src\s?=\s?["']?([^"']*)["']?[^>]*?>/g,
-          '<img src="$1">'
-        )
-        .replace(/<(?!a|img)([\w\-]+)[^>]*>/g, '<$1>')
-        .replace(/<xml[^>]*?>[\w\W]*?<\/xml>/g, '')
-        .replace(/<style>[\w\W]*?<\/style>/g, '')
-
-      return this.exec('insertHtml', html)
+      this.insert(html2md(html))
+    } else if (txt) {
+      this.insert(txt)
     }
+  }
 
-    if (txt) {
-      return this.exec('insertText', txt)
+  #updatePreview() {
+    if (this.previewEnabled) {
+      this.$refs.view.code = this.value
     }
   }
 
   #toolbarClick(ev) {
-    var target = ev.target
+    var elem = ev.target
     var act
 
     this.restoreSelection()
 
-    if (ev.target === ev.currentTarget) {
+    if (elem === ev.currentTarget) {
       return
     }
 
@@ -557,41 +558,15 @@ class MEditor extends Component {
       return
     }
 
-    while (target.tagName !== 'SPAN') {
-      target = target.parentNode
+    while (elem.tagName !== 'SPAN') {
+      elem = elem.parentNode
     }
 
-    act = target.dataset.act
+    act = elem.dataset.act
 
-    this.#hideLayers()
+    // this.#hideLayers()
 
-    switch (act) {
-      case 'font':
-      case 'color':
-      case 'link':
-      case 'table':
-        this.$refs[act].classList.add('fadein')
-        break
-
-      case 'image':
-        // 这里不作任何处理
-        break
-
-      case 'copy':
-        navigator.clipboard.writeText(this.value)
-        break
-
-      case 'fullscreen':
-        this.classList.toggle('fullscreen')
-        break
-
-      default:
-        this.$refs.editor.focus()
-        this.restoreSelection()
-        this.exec(ACTTION[act])
-        this.saveSelection()
-        break
-    }
+    Addon[act].call(this, elem)
   }
 
   #chnageFontSize(ev) {
@@ -688,9 +663,248 @@ class MEditor extends Component {
       gs.addRange(this.#select)
     }
   }
-  // 执行命令
-  exec(cmd, val = '') {
-    document.execCommand(cmd, false, val)
+
+  /**
+   * 往文本框中插入内容
+   * @param {String} val  [要插入的文本]
+   * @param {Boolean} isSelect  [插入之后是否要选中文本]
+   * @param {Boolean} offset  [选中文本时的偏移量]
+   */
+  insert(val = '', isSelect = false, offset = 0) {
+    let $el = this.$refs.editor
+    let start = $el.selectionStart
+    let end = $el.selectionEnd
+    let scrollTop = $el.scrollTop
+
+    if (start || start === 0) {
+      $el.value = $el.value.slice(0, start) + val + $el.value.slice(end)
+
+      this.select(
+        (isSelect ? start : start + val.length) + offset,
+        start + val.length - offset
+      )
+      $el.scrollTop = scrollTop
+      $el.focus()
+    } else {
+      $el.value += val
+      $el.focus()
+    }
+    this.#updatePreview()
+    this.$emit('input')
+  }
+
+  /**
+   * [selection 获取选中的文本]
+   * @param  {[type]} forceHoleLine [是否强制光标所在的整行文本]
+   */
+  selection(forceHoleLine = false) {
+    let $el = this.$refs.editor
+    let start = $el.selectionStart
+    let end = $el.selectionEnd
+
+    if (end) {
+      //强制选择整行
+      if (forceHoleLine) {
+        start = $el.value.slice(0, start).lastIndexOf('\n')
+
+        let tmpEnd = $el.value.slice(end).indexOf('\n')
+        tmpEnd = tmpEnd < 0 ? $el.value.slice(end).length : tmpEnd
+
+        start += 1 // 把\n加上
+        end += tmpEnd
+
+        $el.selectionStart = start
+        $el.selectionEnd = end
+      }
+    } else {
+      //强制选择整行
+      if (forceHoleLine) {
+        end = $el.value.indexOf('\n')
+        end = end < 0 ? $el.value.length : end
+        $el.selectionEnd = end
+      }
+    }
+    $el.focus()
+    return $el.value.slice(start, end)
+  }
+
+  select(start = 0, end = 0) {
+    let $el = this.$refs.editor
+    $el.selectionStart = start
+    $el.selectionEnd = end
+  }
+
+  // 设置光标
+  cursor(pos) {
+    this.select(pos, pos)
+  }
+
+  #cursorMove(step) {
+    let $el = this.$refs.editor
+    let pos = (step < 0 ? $el.selectionStart : $el.selectionEnd) || 0
+    pos += step
+
+    if (step === 0) {
+      return
+    }
+
+    if (pos < 0) {
+      pos = 0
+    }
+    this.cursor(pos)
+  }
+
+  // 获取光标处的字符
+  #getCursorText(n) {
+    let $el = this.$refs.editor
+    let start = $el.selectionStart
+    let pos = $el.selectionEnd
+
+    if (n < 0) {
+      pos = start - 1
+    }
+    return this.value[pos] || ''
+  }
+
+  #handleKeydown(ev) {
+    let $el = this.$refs.editor
+    let wrapTxt = this.selection() || ''
+    let selected = wrapTxt.length > 0
+    let newTxt = ''
+
+    if (this.readOnly || this.disabled) {
+      return
+    }
+
+    switch (ev.keyCode) {
+      //tab键改为插入2个空格,阻止默认事件,防止焦点失去
+      case 9:
+        ev.preventDefault()
+        if (ev.shiftKey && !selected) {
+          let pos = $el.selectionStart
+          let line = this.selection(true)
+          newTxt = line.replace(/^\s{2}/, '')
+          // 防止无法往左取消缩进时, 选中整行
+          if (line === newTxt) {
+            this.cursor(pos)
+            break
+          }
+
+          pos -= 2
+          this.insert(newTxt, selected)
+          this.cursor(pos)
+        } else {
+          newTxt = wrapTxt
+            .split('\n')
+            .map(function (it) {
+              return ev.shiftKey ? it.replace(/^\s{2}/, '') : '  ' + it
+            })
+            .join('\n')
+
+          if (newTxt === wrapTxt) {
+            break
+          }
+          this.insert(newTxt, selected)
+        }
+
+        break
+
+      // 退格键, 遇到成对的符号时,同时删除
+      case 8:
+        if (!selected) {
+          let pos = $el.selectionStart
+          let prev = this.#getCursorText(-1)
+          let next = this.#getCursorText(1)
+
+          if (
+            (prev === next && (prev === '"' || prev === "'")) ||
+            (prev === next && prev === '`') ||
+            (prev === '[' && next === ']') ||
+            (prev === '{' && next === '}') ||
+            (prev === '(' && next === ')')
+          ) {
+            this.select(pos - 1, pos + 1)
+          }
+        }
+        break
+
+      // (
+      case 57:
+        if (ev.shiftKey) {
+          ev.preventDefault()
+
+          this.insert('(' + wrapTxt + ')', selected, (selected && 1) || 0)
+          this.#cursorMove(selected ? 0 : -1)
+        }
+        break
+      // )
+      case 48:
+        if (ev.shiftKey) {
+          let prev = this.#getCursorText(-1)
+          let next = this.#getCursorText(1)
+          if (prev === '(' && next === ')') {
+            ev.preventDefault()
+            this.#cursorMove(1)
+          }
+        }
+        break
+
+      case 219: // [ & {
+        ev.preventDefault()
+        this.insert(
+          ev.shiftKey ? `{${wrapTxt}}` : `[${wrapTxt}]`,
+          selected,
+          selected ^ 0
+        )
+        this.#cursorMove(selected ? 0 : -1)
+        break
+      // } & ]
+      case 221: {
+        let prev = this.#getCursorText(-1)
+        let next = this.#getCursorText(1)
+        if (ev.shiftKey) {
+          if (prev === '{' && next === '}') {
+            ev.preventDefault()
+            this.#cursorMove(1)
+          }
+        } else {
+          if (prev === '[' && next === ']') {
+            ev.preventDefault()
+            this.#cursorMove(1)
+          }
+        }
+        break
+      }
+
+      //  `
+      case 192:
+      // ' & "
+      case 222:
+        if (ev.shiftKey && ev.keyCode === 192) {
+          break
+        } else {
+          let val = ev.keyCode === 192 ? '`' : ev.shiftKey ? '"' : "'"
+          let prev = this.#getCursorText(-1)
+          let next = this.#getCursorText(1)
+
+          if (prev === '' && next === val) {
+            break
+          }
+          ev.preventDefault()
+
+          if (selected) {
+            this.insert(val + wrapTxt + val, true, 1)
+          } else {
+            if (prev === next && prev === val) {
+              this.#cursorMove(1)
+            } else {
+              this.insert(val + wrapTxt + val)
+              this.#cursorMove(-1)
+            }
+          }
+          break
+        }
+    }
   }
 
   mounted() {}
@@ -704,6 +918,7 @@ class MEditor extends Component {
       <div class="meditor">
         <header
           class=${classMap({ toolbar: true, active: this.#toolbar.length })}
+          @click=${this.#toolbarClick}
         >
           ${renderToolbar(this.#toolbar)}
         </header>
@@ -714,11 +929,11 @@ class MEditor extends Component {
             spellcheck="false"
             :readOnly=${this.readOnly}
             :disabled=${this.disabled}
-            @input=${function (ev) {
-              // this.value = ev.target.value
-            }}
+            @keydown=${this.#handleKeydown}
+            @paste.prevent=${this.#handlePaste}
+            @input=${this.#updatePreview}
           ></textarea>
-          <wc-markd class="preview"></wc-markd>
+          <wc-markd ref="view" class="preview"></wc-markd>
         </div>
       </div>
     `