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How to implement messages in javascript: 1. Create an HTML sample file and enter the input tag; 2. Enter the script tag; 3. Implement it through the js code "oPostBtn.onclick = function(){...}" Just leave a message.
The operating environment of this article: windows7 system, javascript version 1.8.5, Dell G3 computer.
How to leave a message in javascript?
JS native writing to implement the message board function
implementation The function of this message board is relatively simple, so let’s show the renderings first:
Realize the content of user messages and the specific time of messages.
<script> window.onload = function(){ var oMessageBox = document.getElementById("messageBox"); var oInput = document.getElementById("myInput"); var oPostBtn = document.getElementById("doPost"); oPostBtn.onclick = function(){ if(oInput.value){ //写入发表留言的时间 var oTime = document.createElement("p"); oTime.className = "time"; var myDate = new Date(); oTime.innerHTML = myDate.toLocaleString(); oMessageBox.appendChild(oTime); //写入留言内容 var oMessageContent = document.createElement("p"); oMessageContent.className = "message_content"; oMessageContent.innerHTML = oInput.value; oInput.value = ""; oMessageBox.appendChild(oMessageContent); } } } </script>
Catch the content by getting the input focus event of the input, and pass it to the p of the message board for display.
<body> <div class="content"> <div class="title">用户留言</div> <div class="message_box" id="messageBox"></div> <div><input id="myInput" type="text" placeholder="请输入留言类容"><button id="doPost">提交</button></div> </div> </body>
Recommended study: "js Basic Tutorial"
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