Fix bug 578

app/static/js/checkboxes.js

@@ -0,0 +1,5 @@
+function toggleCheckboxSelection(checkStatus) {
+    // used in userpage_post.html
+    const checkBoxes = document.getElementsByName('marked');
+    checkBoxes.forEach((checkbox) => { checkbox.checked = checkStatus;} );
+}

app/static/js/fillword.js

@@ -1,5 +1,5 @@
-let isRead = true;
+let isRead = localStorage.getItem('readChecked') !== 'false';  // default to true
-let isChoose = true;
+let isChoose = localStorage.getItem('chooseChecked') !== 'false';
 
 function getWord() {
     return window.getSelection ? window.getSelection() : document.selection.createRange().text;
@@ -8,9 +8,17 @@ function getWord() {
 function fillInWord() {
     let word = getWord();
     if (isRead) Reader.read(word, inputSlider.value);
-    if (!isChoose) return;
+    if (!isChoose) {
+        if(isHighlight){
+             const element = document.getElementById("selected-words3");
+             element.value = element.value + " " + word;
+        }
+        return;
+    }
     const element = document.getElementById("selected-words");
+    localStorage.setItem('nowWords', element.value);
     element.value = element.value + " " + word;
+    localStorage.setItem('selectedWords', element.value);
 }
 
 document.getElementById("text-content").addEventListener("click", fillInWord, false);
@@ -24,8 +32,16 @@ inputSlider.oninput = () => {
 
 function onReadClick() {
     isRead = !isRead;
+    localStorage.setItem('readChecked', isRead);
 }
 
 function onChooseClick() {
     isChoose = !isChoose;
+    localStorage.setItem('chooseChecked', isChoose);
 }
+
+// 如果网页刷新，停止播放声音
+if (performance.getEntriesByType("navigation")[0].type == "reload") {
+    Reader.stopRead();
+}
+

app/static/js/highlight.js

@@ -1,4 +1,4 @@
-let isHighlight = true;
+let isHighlight = localStorage.getItem('highlightChecked') !== 'false'; // default to true
 
 function cancelBtnHandler() {
     cancelHighlighting();
@@ -22,62 +22,48 @@ function getWord() {
 
 function highLight() {
     if (!isHighlight) return;
-    let articleContent = document.getElementById("article").innerText; //将原来的.innerText改为.innerHtml，使用innerText会把原文章中所包含的<br>标签去除，导致处理后的文章内容失去了原来的格式
+    let word = (getWord() + "").trim();
+    let articleContent = document.getElementById("article").innerHTML; // innerHTML保留HTML标签来保持部分格式，且适配不同的浏览器
     let pickedWords = document.getElementById("selected-words");  // words picked to the text area
     let dictionaryWords = document.getElementById("selected-words2"); // words appearing in the user's new words list
-    let allWords = "";  //初始化allWords的值，避免进入判断后编译器认为allWords未初始化的问题
+    let allWords = dictionaryWords === null ? pickedWords.value + " " : pickedWords.value + " " + dictionaryWords.value;
-    if(dictionaryWords != null){//增加一个判断，检查生词本里面是否为空，如果为空，allWords只添加选中的单词
+    highlightWords = document.getElementById("selected-words3");
-        allWords = pickedWords.value + " " + dictionaryWords.value;
+    allWords = highlightWords == null ? allWords : allWords + " " + highlightWords.value;
+    const list = allWords.split(" "); // 将所有的生词放入一个list中
+    if(word !== null && word !== "" && word !== " "){
+        let articleContent_fb2 = articleContent;
+        if(localStorage.getItem("nowWords").indexOf(word) !== -1 || localStorage.getItem("nowWords").indexOf(word.toLowerCase()) !== -1){
+            articleContent = articleContent.replace(new RegExp('<span class="highlighted">' + word + '</span>', "gi"), word);
+            pickedWords.value = localStorage.getItem("nowWords").replace(word,"");
+            document.getElementById("article").innerHTML = articleContent;
+            return;
+        }
     }
-    else{
+    let totalSet = new Set();
-        allWords = pickedWords.value + " ";
-    }
-    const list = allWords.split(" ");//将所有的生词放入一个list中，用于后续处理
     for (let i = 0; i < list.length; ++i) {
-        list[i] = list[i].replace(/(^\s*)|(\s*$)/g, ""); //消除单词两边的空字符
+        list[i] = list[i].replace(/(^\W*)|(\W*$)/g, ""); // 消除单词两边的非单词字符
         list[i] = list[i].replace('|', "");
         list[i] = list[i].replace('?', "");
-        if (list[i] !== "" && "<mark>".indexOf(list[i]) === -1 && "</mark>".indexOf(list[i]) === -1) {
+        if (list[i] != "" && !totalSet.has(list[i])) {
-           //将文章中所有出现该单词word的地方改为："<mark>" + word + "<mark>"。 正则表达式RegExp()中，"\\b"代表单词边界匹配。
+            // 返回所有匹配单词的集合, 正则表达式RegExp()中, "\b"匹配一个单词的边界, g 表示全局匹配, i 表示对大小写不敏感。
-
+            let matches = new Set(articleContent.match(new RegExp("\\b" + list[i] + "\\b", "gi")));
-            //修改代码
+            totalSet = new Set([...totalSet, ...matches]);
-            let articleContent_fb = articleContent;  //文章副本
-            while(articleContent_fb.toLowerCase().indexOf(list[i].toLowerCase()) !== -1 && list[i]!=""){
-                //找到副本中和list[i]匹配的第一个单词(第一种匹配情况),并赋值给list[i]。
-                const index = articleContent_fb.toLowerCase().indexOf(list[i].toLowerCase());
-                list[i] = articleContent_fb.substring(index, index + list[i].length);
-
-                articleContent_fb = articleContent_fb.substring(index + list[i].length);    // 使用副本中list[i]之后的子串替换掉副本
-                articleContent = articleContent.replace(new RegExp("\\b"+list[i]+"\\b","g"),"<mark>" + list[i] + "</mark>");
-            }
         }
     }
+    // 删除所有的"<span class='highlighted'>"标签,防止标签发生嵌套
+    articleContent = articleContent.replace(new RegExp('<span class="highlighted">',"gi"), "")
+    articleContent = articleContent.replace(new RegExp("</span>","gi"), "");
+    // 将文章中所有出现该单词word的地方改为："<span class='highlighted'>" + word + "</span>"。
+    for (let word of totalSet) {
+        articleContent = articleContent.replace(new RegExp("\\b" + word + "\\b", "g"), "<span class='highlighted'>" + word + "</span>");
+    }
     document.getElementById("article").innerHTML = articleContent;
 }
 
 function cancelHighlighting() {
-    let articleContent = document.getElementById("article").innerText;//将原来的.innerText改为.innerHtml，原因同上
+    let articleContent = document.getElementById("article").innerHTML;
-    let pickedWords = document.getElementById("selected-words");
+    articleContent = articleContent.replace(new RegExp('<span class="highlighted">',"gi"), "")
-    const dictionaryWords = document.getElementById("selected-words2");    
+    articleContent = articleContent.replace(new RegExp("</span>","gi"), "");
-    const list = pickedWords.value.split(" ");    
-    if (pickedWords != null) {
-        for (let i = 0; i < list.length; ++i) {
-            list[i] = list[i].replace(/(^\s*)|(\s*$)/g, "");
-            if (list[i] !== "") { //原来判断的代码中，替换的内容为“list[i]”这个字符串，这明显是错误的，我们需要替换的是list[i]里的内容
-                articleContent = articleContent.replace(new RegExp("<mark>"+list[i]+"</mark>", "g"), list[i]);
-            }
-        }
-    }
-    if (dictionaryWords != null) {
-        let list2 = pickedWords.value.split(" ");
-        for (let i = 0; i < list2.length; ++i) {
-            list2 = dictionaryWords.value.split(" ");
-            list2[i] = list2[i].replace(/(^\s*)|(\s*$)/g, "");
-            if (list2[i] !== "") { //原来代码中，替换的内容为“list[i]”这个字符串，这明显是错误的，我们需要替换的是list[i]里的内容
-                articleContent = articleContent.replace(new RegExp("<mark>"+list2[i]+"</mark>", "g"), list2[i]);
-            }
-        }
-    }
     document.getElementById("article").innerHTML = articleContent;
 }
 
@@ -97,6 +83,7 @@ function toggleHighlighting() {
         isHighlight = true;
         highLight();
     }
+     localStorage.setItem('highlightChecked', isHighlight);
 }
 
-showBtnHandler();
+showBtnHandler();

app/static/js/read.js

@@ -9,7 +9,7 @@ var Reader = (function() {
         msg.rate = rate;
         msg.lang = "en-US";
         msg.onboundary = ev => {
-            if (ev.name == "word") {
+            if (ev.name === "word") {
                 current_position = ev.charIndex;
             }
         }
@@ -32,4 +32,4 @@ var Reader = (function() {
         read: read,
         stopRead: stopRead
     };
-})();
+}) ();

app/static/js/word_operation.js

@@ -5,15 +5,14 @@ function familiar(theWord) {
     $.ajax({
         type:"GET",
         url:"/" + username + "/" + word + "/familiar",
-        success:function(response){
+        success:function(response) {
             let new_freq = freq - 1;
             const allow_move = document.getElementById("move_dynamiclly").checked;
             if (allow_move) {
-
                 if (new_freq <= 0) {
                     removeWord(theWord);
                 } else {
-                    renderWord({ word: theWord, freq: new_freq });
+                    renderWord({word: theWord, freq: new_freq});
                 }
             } else {
                 if(new_freq <1) {
@@ -33,11 +32,11 @@ function unfamiliar(theWord) {
     $.ajax({
         type:"GET",
         url:"/" + username + "/" + word + "/unfamiliar",
-        success:function(response){
+        success:function(response) {
             let new_freq = parseInt(freq) + 1;
             const allow_move = document.getElementById("move_dynamiclly").checked;
             if (allow_move) {
-                renderWord({ word: theWord, freq: new_freq });
+                renderWord({word: theWord, freq: new_freq});
             } else {
                 $("#freq_" + theWord).text(new_freq);
             }
@@ -51,7 +50,7 @@ function delete_word(theWord) {
     $.ajax({
         type:"GET",
         url:"/" + username + "/" + word + "/del",
-        success:function(response){
+        success:function(response) {
             const allow_move = document.getElementById("move_dynamiclly").checked;
             if (allow_move) {
                 removeWord(theWord);
@@ -114,7 +113,7 @@ function removeWord(word) {
     // 根据词频信息删除元素
     word = word.replace('&amp;', '&');
     const element_to_remove = document.getElementById(`p_${word}`);
-    if (element_to_remove != null) {
+    if (element_to_remove !== null) {
         element_to_remove.remove();
     }
 }
@@ -129,7 +128,7 @@ function renderWord(word) {
     for (const current of container.children) {
         const cur_word = parseWord(current);
         // 找到第一个词频比它小的元素，插入到这个元素前面
-        if (compareWord(cur_word, word) == -1) {
+        if (compareWord(cur_word, word) === -1) {
             container.insertBefore(new_element, current);
             inserted = true;
             break;
@@ -165,17 +164,32 @@ function elementFromString(string) {
  *  当first大于second时返回1
  */
 function compareWord(first, second) {
-    if (first.freq < second.freq) {
+    if (first.freq !== second.freq) {
-        return -1;
+        return first.freq < second.freq ? -1 : 1;
     }
-    if (first.freq > second.freq) {
+    if (first.word !== second.word) {
-        return 1;
+        return first.word < second.word ? -1 : 1;
-    }
-    if (first.word < second.word) {
-        return -1;
-    }
-    if (first.word > second.word) {
-        return 1;
     }
     return 0;
 }
+
+/* 生词csv导出 */
+function exportToCSV() {
+    let csvContent = "data:text/csv;charset=utf-8,Word,Frequency\n";
+    let rows = document.querySelectorAll(".new-word");
+
+    rows.forEach(row => {
+        let word = row.querySelector("a.btn-light").innerText;
+        let freq = row.querySelector("a[title]").innerText;
+        csvContent += word + "," + freq + "\n";
+    });
+
+    let encodedUri = encodeURI(csvContent);
+    let link = document.createElement("a");
+    link.setAttribute("href", encodedUri);
+    link.setAttribute("download", "word_list.csv");
+    document.body.appendChild(link);
+
+    link.click();
+    document.body.removeChild(link);
+}

app/templates/mainpage_get.html

@@ -34,9 +34,9 @@
         <div class="alert alert-success" role="alert">共有文章 <span class="badge bg-success"> {{ number_of_essays }} </span> 篇</div>
         <p>粘贴1篇文章 (English only)</p>
         <form method="post" action="/">
-            <textarea name="content" rows="10" cols="120"></textarea><br/>
+            <textarea name="content" id="article" rows="10" cols="120"></textarea><br/>
             <input type="submit" value="get文章中的词频"/>
-            <input type="reset" value="清除"/>
+            <input type="reset" value="清除" onclick="clearArticle()"/>
         </form>
         {% if d_len > 0 %}
             <p><b>最常见的词</b></p>
@@ -44,6 +44,7 @@
                 <a href="http://youdao.com/w/eng/{{x[0]}}/#keyfrom=dict2.index">{{x[0]}}</a> {{x[1]}}
             {% endfor %}
         {% endif %}
+        <p class="text-muted">Version: 20240618</p>
         <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.0.2/dist/js/bootstrap.bundle.min.js" integrity="sha384-MrcW6ZMFYlzcLA8Nl+NtUVF0sA7MsXsP1UyJoMp4YLEuNSfAP+JcXn/tWtIaxVXM" crossorigin="anonymous"></script>
     </div>
     {{ yml['footer'] | safe }}
@@ -52,5 +53,22 @@
             <script src="{{ js }}" ></script>
         {% endfor %}
     {% endif %}
+<script type="text/javascript">
+    // IIFE, avoid polluting the global scope
+    (function() {
+        const articleInput = document.querySelector('#article');
+        articleInput.value = localStorage.getItem('article') || '';
+
+        articleInput.addEventListener('input', function() {
+            localStorage.setItem('article', articleInput.value);
+        });
+
+        window.clearArticle = function() {
+            localStorage.removeItem('article');
+            articleInput.value = '';
+        };
+    })();
+
+</script>
 </body>
 </html>

app/templates/userpage_get.html

@@ -1,4 +1,4 @@
-<!DOCTYPE html>
+<!DOCTYPE html>
 <html lang="en">
 <head>
     <meta charset="UTF-8">
@@ -23,44 +23,34 @@
     <title>EnglishPal Study Room for {{ username }}</title>
 
     <style>
-        .shaking {
+      .shaking {
-            animation: shakes 1600ms ease-in-out;
+          animation: shakes 1600ms ease-in-out;
-        }
+      }
 
-        @keyframes shakes {
+      @keyframes shakes {
-            10%, 90% {
+          10%, 90% { transform: translate3d(-1px, 0, 0); }
-                transform: translate3d(-1px, 0, 0);
+          20%, 50% { transform: translate3d(+2px, 0, 0); }
-            }
+          30%, 70% { transform: translate3d(-4px, 0, 0); }
-            20%, 50% {
+          40%, 60% { transform: translate3d(+4px, 0, 0); }
-                transform: translate3d(+2px, 0, 0);
+          50% { transform: translate3d(-4px, 0, 0); }
-            }
+      }
-            30%, 70% {
-                transform: translate3d(-4px, 0, 0);
-            }
-            40%, 60% {
-                transform: translate3d(+4px, 0, 0);
-            }
-            50% {
-                transform: translate3d(-4px, 0, 0);
-            }
-        }
 
-        .lead {
+      .lead{
-            font-size: 22px;
+          font-size: 22px;
-            font-family: Helvetica, sans-serif;
+          font-family: Helvetica, sans-serif;
-            white-space: pre-wrap;
+          white-space: pre-wrap;
-        }
+      }
 
-        .arrow {
+      .arrow {
-            padding: 0;
+	  padding: 0;
-            font-size: 20px;
+	  font-size: 20px;
-            line-height: 21px;
+	  line-height: 21px;
-            display: inline-block;
+	  display: inline-block;
-        }
+      }
 
-        .arrow:hover {
+      .arrow:hover {
-            cursor: pointer;
+	  cursor: pointer;
-        }
+      }
 
     </style>
 </head>
@@ -69,83 +59,72 @@
     <p><b>English Pal for <font id="username" color="red">{{ username }}</font></b>
 
         {% if username ==  admin_name %}
-            <a class="btn btn-secondary" href="/admin" role="button" onclick="stopRead()">管理</a>
+        <a class="btn btn-secondary" href="/admin" role="button" onclick="stopRead()">管理</a>
         {% endif %}
         <a id="quit" class="btn btn-secondary" href="/logout" role="button" onclick="stopRead()">退出</a>
         <a class="btn btn-secondary" href="/reset" role="button" onclick="stopRead()">重设密码</a>
 
     </p>
     {% for message in get_flashed_messages() %}
-        <div class="alert alert-warning alert-dismissible fade show" role="alert">
+    <div class="alert alert-warning alert-dismissible fade show" role="alert">
-            {{ message }}
+	{{ message }}
-            <button type="button" class="btn-close" data-bs-dismiss="alert" aria-label="Close"></button>
+	<button type="button" class="btn-close" data-bs-dismiss="alert" aria-label="Close"></button>
-        </div>
+    </div>
     {% endfor %}
 
-    <button class="arrow" id="load_next_article" onclick="load_next_article();Reader.stopRead()"
+        <button class="arrow" id="load_next_article" onclick="load_next_article();Reader.stopRead()" title="下一篇 Next Article">⇨</button>
-            title="下一篇 Next Article">⇨
+        <button class="arrow" id="load_pre_article" onclick="load_pre_article();Reader.stopRead()" style="display: none" title="上一篇 Previous Article">⇦</button>
-    </button>
-    <button class="arrow" id="load_pre_article" onclick="load_pre_article();Reader.stopRead()" style="display: none"
-            title="上一篇 Previous Article">⇦
-    </button>
 
     <p><b>阅读文章并回答问题</b></p>
     <div id="text-content">
         <div id="found">
-            <div class="alert alert-success" role="alert">According to your word list, your level is <span
+            <div class="alert alert-success" role="alert">According to your word list, your level is <span class="text-decoration-underline" id="user_level">{{ today_article["user_level"] }}</span>  and we have chosen an article with a difficulty level of <span class="text-decoration-underline" id="text_level">{{ today_article["text_level"] }}</span> for you.</div>
-                    class="text-decoration-underline" id="user_level">{{ today_article["user_level"] }}</span> and we
+                <p class="text-muted" id="date">Article added on: {{ today_article["date"] }}</p><br/>
-                have chosen an article with a difficulty level of <span class="text-decoration-underline"
-                                                                        id="text_level">{{ today_article["text_level"] }}</span>
-                for you.
-            </div>
-            <p class="text-muted" id="date">Article added on: {{ today_article["date"] }}</p><br/>
             <div class="p-3 mb-2 bg-light text-dark" style="margin: 0 0.5%;"><br/>
-                <p class="display-6" id="article_title">{{ today_article["article_title"] }}</p><br/>
+            <p class="display-6" id="article_title">{{ today_article["article_title"] }}</p><br/>
-                <p class="lead"><font id="article">{{ today_article["article_body"] }}</font></p><br/>
+            <p class="lead"><font id="article">{{ today_article["article_body"] }}</font></p><br/>
-                <div>
+            <div>
-                    <p><small class="text-muted" id="source">{{ today_article['source'] }}</small></p><br/>
+                <p><small class="text-muted" id="source">{{ today_article['source'] }}</small></p><br/>
-                </div>
+            </div>
 
-                <p><b id="question">{{ today_article['question'] }}</b></p><br/>
+            <p><b id="question">{{ today_article['question'] }}</b></p><br/>
                 <script type="text/javascript">
                     function toggle_visibility(id) { {# https://css-tricks.com/snippets/javascript/showhide-element/#}
                         const e = document.getElementById(id);
-                        if (e.style.display === 'block')
+                        if(e.style.display === 'block')
                             e.style.display = 'none';
                         else
                             e.style.display = 'block';
                     }
                 </script>
                 <button onclick="toggle_visibility('answer');">ANSWER</button>
-                <div id="answer" style="display:none;">{{ today_article['answer'] }}</div>
+                <div id="answer" style="display:none;">{{ today_article['answer'] }}</div><br/>
-                <br/>
             </div>
         </div>
         <div class="alert alert-success" role="alert" id="not_found" style="display:none;">
-            <p class="text-muted"><span class="badge bg-success">Notes:</span><br>No article is currently available for
+            <p class="text-muted"><span class="badge bg-success">Notes:</span><br>No article is currently available for you. You can try again a few times or mark new words in the passage to improve your level.</p>
-                you. You can try again a few times or mark new words in the passage to improve your level.</p>
         </div>
         <div class="alert alert-success" role="alert" id="read_all" style="display:none;">
             <p class="text-muted"><span class="badge bg-success">Notes:</span><br>You've read all the articles.</p>
         </div>
     </div>
 
-    <input type="checkbox" id="highlightCheckbox" onclick="toggleHighlighting()"/>生词高亮
+    <input type="checkbox" id="highlightCheckbox" onclick="toggleHighlighting()" />生词高亮
-    <input type="checkbox" id="readCheckbox" onclick="onReadClick()"/>大声朗读
+    <input type="checkbox" id="readCheckbox" onclick="onReadClick()" />大声朗读
-    <input type="checkbox" id="chooseCheckbox" onclick="onChooseClick()"/>划词入库
+    <input type="checkbox" id="chooseCheckbox" onclick="onChooseClick()" />划词入库
     <div class="range">
         <div class="field">
             <div class="sliderValue">
                 <span id="rangeValue">1×</span>
             </div>
-            <input type="range" id="rangeComponent" min="0.5" max="2" value="1" step="0.25"/>
+            <input type="range" id="rangeComponent" min="0.5" max="2" value="1" step="0.25" />
         </div>
     </div>
     <p><b>收集生词吧</b> （可以在正文中划词，也可以复制黏贴）</p>
     <form method="post" action="/{{ username }}/userpage">
         <textarea name="content" id="selected-words" rows="10" cols="120"></textarea><br/>
         <button class="btn btn-primary btn-lg" type="submit" onclick="Reader.stopRead()">把生词加入我的生词库</button>
-        <button class="btn btn-primary btn-lg" type="reset" onclick="clearSelectedWords()">清除</button>
+        <button class="btn btn-primary btn-lg" type="reset"  onclick="clearSelectedWords()">清除</button>
     </form>
     {% if session.get['thisWord'] %}
         <script type="text/javascript">
@@ -166,6 +145,8 @@
                 允许动态调整顺序
             </label>
         </p>
+        <!--添加导出按钮-->
+        <button class="btn btn-primary" onclick="exportToCSV()">导出</button>
         <a name="aaa"></a>
         <div class="word-container">
             {% for x in lst3 %}
@@ -173,10 +154,9 @@
                 {% set freq = x[1] %}
                 {% if session.get('thisWord') == x[0] and session.get('time') == 1 %}
                 {% endif %}
-                <p id='p_{{ word }}' class="new-word">
+                <p id='p_{{ word }}' class="new-word" >
-                    <a id="word_{{ word }}" class="btn btn-light"
+                    <a id="word_{{ word }}"  class="btn btn-light" href='http://youdao.com/w/eng/{{ word }}/#keyfrom=dict2.index'
-                       href='http://youdao.com/w/eng/{{ word }}/#keyfrom=dict2.index'
+                    role="button">{{ word }}</a>
-                       role="button">{{ word }}</a>
                     ( <a id="freq_{{ word }}" title="{{ word }}">{{ freq }}</a> )
                     <a class="btn btn-success" onclick="familiar('{{ word }}')" role="button">熟悉</a>
                     <a class="btn btn-warning" onclick="unfamiliar('{{ word }}')" role="button">不熟悉</a>
@@ -186,8 +166,10 @@
             {% endfor %}
         </div>
         <input id="selected-words2" type="hidden" value="{{ words }}">
+
     {% endif %}
 </div>
+<label id="selected-words3" type="hidden"></label>
 {{ yml['footer'] | safe }}
 {% if yml['js']['bottom'] %}
     {% for js in yml['js']['bottom'] %}
@@ -244,78 +226,66 @@
     }
 
 
-    function load_next_article() {
+    function load_next_article(){
-        $("#load_next_article").prop("disabled", true)
         $.ajax({
             url: '/get_next_article/{{username}}',
             dataType: 'json',
-            success: function (data) {
+            success: function(data) {
                 // 更新页面内容
-                if (data['today_article']) {
+                if(data['today_article']){
                     update(data['today_article']);
                     check_pre(data['visited_articles']);
                     check_next(data['result_of_generate_article']);
                 }
-            }, complete: function (xhr, status) {
-                $("#load_next_article").prop("disabled", false)
             }
         });
     }
-
+    function load_pre_article(){
-    function load_pre_article() {
         $.ajax({
             url: '/get_pre_article/{{username}}',
             dataType: 'json',
-            success: function (data) {
+            success: function(data) {
                 // 更新页面内容
-                if (data['today_article']) {
+                if(data['today_article']){
                     update(data['today_article']);
                     check_pre(data['visited_articles']);
                 }
             }
         });
     }
-
+    function update(today_article){
-    function update(today_article) {
         $('#user_level').html(today_article['user_level']);
         $('#text_level').html(today_article["text_level"]);
-        $('#date').html('Article added on: ' + today_article["date"]);
+        $('#date').html('Article added on: '+today_article["date"]);
         $('#article_title').html(today_article["article_title"]);
         $('#article').html(today_article["article_body"]);
         $('#source').html(today_article['source']);
         $('#question').html(today_article["question"]);
         $('#answer').html(today_article["answer"]);
         document.querySelector('#text_level').classList.add('mark'); // highlight text difficult level for 2 seconds
-        setTimeout(() => {
+        setTimeout(() => {document.querySelector('#text_level').classList.remove('mark');}, 2000);
-            document.querySelector('#text_level').classList.remove('mark');
-        }, 2000);
         document.querySelector('#user_level').classList.add('mark'); // do the same thing for user difficulty level
-        setTimeout(() => {
+        setTimeout(() => {document.querySelector('#user_level').classList.remove('mark');}, 2000);
-            document.querySelector('#user_level').classList.remove('mark');
-        }, 2000);
     }
-
+<!-- 检查是否存在上一篇或下一篇，不存在则对应按钮隐藏-->
-    <!-- 检查是否存在上一篇或下一篇，不存在则对应按钮隐藏-->
+    function check_pre(visited_articles){
-    function check_pre(visited_articles) {
+        if((visited_articles=='')||(visited_articles['index']<=0)){
-        if ((visited_articles == '') || (visited_articles['index'] <= 0)) {
             $('#load_pre_article').hide();
             sessionStorage.setItem('pre_page_button', 'display')
-        } else {
+        }else{
             $('#load_pre_article').show();
             sessionStorage.setItem('pre_page_button', 'show')
         }
     }
-
+    function check_next(result_of_generate_article){
-    function check_next(result_of_generate_article) {
+        if(result_of_generate_article == "found"){
-        if (result_of_generate_article == "found") {
+            $('#found').show();$('#not_found').hide();
-            $('#found').show();
-            $('#not_found').hide();
             $('#read_all').hide();
-        } else if (result_of_generate_article == "not found") {
+        }else if(result_of_generate_article == "not found"){
             $('#found').hide();
             $('#not_found').show();
             $('#read_all').hide();
-        } else {
+        }else{
             $('#found').hide();
             $('#not_found').hide();
             $('#read_all').show();
@@ -325,7 +295,7 @@
 </body>
 <style>
     mark {
-        color: #{{ yml['highlight']['color'] }};
+        color: red;
         background-color: rgba(0, 0, 0, 0);
     }
 </style>