Load text from local .txt file into html textarea using JavaScript

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I have a </code> element and a button that calls a <code>loadFile()</code> JavaScript function. I want this function to allow me to load the text from <script async src="https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js"></script> <ins class="adsbygoogle" style="display:block" data-ad-client="ca-pub-5408099190056760" data-ad-slot="7305827575" data-ad-format="auto" data-full-width-responsive="true"></ins> <script> (adsbygoogle = window.adsbygoogle || []).push({}); </script> </div> <div class="relativetags"> 相关标签: </div> </div> <div class="fly-panel detail-box" id="flyReply"> <fieldset class="layui-elem-field layui-field-title" style="text-align: center;"> <legend>2条回答</legend> </fieldset> <ul class="jieda" id="jieda"> <li data-id="111"> <a name="item-1111111111"></a> <div class="detail-about detail-about-reply"> <a class="fly-avatar" href="https://www.e-learn.cn/qa/u-61.html"> <img src="https://www.e-learn.cn/qa/data/avatar/000/00/00/small_000000061.jpg" alt=" "> </a> <div class="fly-detail-user"> <a href="https://www.e-learn.cn/qa/u-61.html" class="fly-link"> <cite>面向向阳花 </cite> </a> </div> <div class="detail-hits"> <span>2020-12-11 19:31</span> </div> </div> <div class="detail-body jieda-body photos"> <p>You can use the File and FileReader objects to read local files.</p> <p>You can use an input element with type="file" to allow the user to select a file.</p> <pre><code><input id="myFile" type="file"/> <textarea id="myTextArea" rows="4" columns="20"></textArea> </code></pre> <p>After the user has selected a file, you can get the File object from the input element. For example...</p> <pre><code>var file = document.getElementById("myFile").files[0]; </code></pre> <p>You can then use a FileReader object to read the file into the text area. For example...</p> <pre><code>var reader = new FileReader(); reader.onload = function (e) { var textArea = document.getElementById("myTextArea"); textArea.value = e.target.result; }; reader.readAsText(file); </code></pre> <div class="appendcontent"> </div> </div> <div class="jieda-reply"> <span class="jieda-zan button_agree" type="zan" data-id='1073195'> <i class="iconfont icon-zan"></i> <em>0</em> </span> <span type="reply" class="showpinglun" data-id="1073195"> <i class="iconfont icon-svgmoban53"></i> 讨论(0) </span> <div class="jieda-admin"> </div> </div> <div class="comments-mod " style="display: none; float:none;padding-top:10px;" id="comment_1073195"> <div class="areabox clearfix"> <form class="layui-form" action=""> <div class="layui-form-item"> <label class="layui-form-label" style="padding-left:0px;width:60px;">发布评论:</label> <div class="layui-input-block" style="margin-left:90px;"> <input type="text" placeholder="不少于5个字" AUTOCOMPLETE="off" class="comment-input layui-input" name="content" /> <input type='hidden' value='0' name='replyauthor' /> </div> <div class="mar-t10"><span class="fr layui-btn layui-btn-sm addhuidapinglun" data-id="1073195">提交评论 </span></div> </div> </form> </div> <hr> <ul class="my-comments-list nav"> <li class="loading"> <img src='https://www.e-learn.cn/qa/static/css/default/loading.gif' align='absmiddle' /> 加载中... </li> </ul> </div> </li> <li data-id="111"> <a name="item-1111111111"></a> <div class="detail-about detail-about-reply"> <a class="fly-avatar" href="https://www.e-learn.cn/qa/u-114.html"> <img src="https://www.e-learn.cn/qa/data/avatar/000/00/01/small_000000114.jpg" alt=" "> </a> <div class="fly-detail-user"> <a href="https://www.e-learn.cn/qa/u-114.html" class="fly-link"> <cite>难免孤独 </cite> </a> </div> <div class="detail-hits"> <span>2020-12-11 19:32</span> </div> </div> <div class="detail-body jieda-body photos"> <p>I found a old topic about this: How do I load the contents of a text file into a javascript variable?</p> <p>Have you read the last answer already? This works with a div instead of a textbox, but you could adapt the code a bit.</p> <p>In the last piece of the last commenters post you could change this line:</p> <pre><code>document.getElementById("id01").innerHTML = out; </code></pre> <p>to:</p> <pre><code>document.getElementById("textbox01").innerHTML = out; </code></pre> <p>And in your HTML:</p> <pre><code><textarea name="textbox01">Enter text here...</textarea> </code></pre> <p>Result:</p> <pre><code>function loadFile() { var xmlhttp = new XMLHttpRequest(); var url = "file.txt"; xmlhttp.onreadystatechange = function() { if (xmlhttp.readyState == 4 && xmlhttp.status == 200) { var myArr = JSON.parse(xmlhttp.responseText); myFunction(myArr); console.log("xmlhttp Request Asepted"); } } xmlhttp.open("GET", url, true); xmlhttp.send(); function myFunction(arr) { var out = ""; var i; var row = 0; for(i = 0; i < arr.length; i++) { // console.log( arr[1].data); change data to what every you have in your file // out += arr[i].data + '<br>' + arr[i].data2 ; document.getElementById("textbox01").innerHTML = out; } } } </code></pre> <div class="appendcontent"> </div> </div> <div class="jieda-reply"> <span class="jieda-zan button_agree" type="zan" data-id='1073196'> <i class="iconfont icon-zan"></i> <em>0</em> </span> <span type="reply" class="showpinglun" data-id="1073196"> <i class="iconfont icon-svgmoban53"></i> 讨论(0) </span> <div class="jieda-admin"> </div> </div> <div class="comments-mod " style="display: none; float:none;padding-top:10px;" id="comment_1073196"> <div class="areabox clearfix"> <form class="layui-form" action=""> <div class="layui-form-item"> <label class="layui-form-label" style="padding-left:0px;width:60px;">发布评论:</label> <div class="layui-input-block" style="margin-left:90px;"> <input type="text" placeholder="不少于5个字" AUTOCOMPLETE="off" class="comment-input layui-input" name="content" /> <input type='hidden' value='0' name='replyauthor' /> </div> <div class="mar-t10"><span class="fr layui-btn layui-btn-sm addhuidapinglun" data-id="1073196">提交评论 </span></div> </div> </form> </div> <hr> <ul class="my-comments-list nav"> <li class="loading"> <img src='https://www.e-learn.cn/qa/static/css/default/loading.gif' align='absmiddle' /> 加载中... </li> </ul> </div> </li> <style> .laypage-main a, .laypage-main span { display: inline-block; 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