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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