JS实现留言板功能[楼层效果展示]
程序员文章站
2022-09-28 10:59:05
功能实现：
1.发布人和发布内容非空校验
2.编辑删除功能
3.楼层效果展示
4.发布时间展示
效果图
目录
to...
功能实现：
1.发布人和发布内容非空校验
2.编辑删除功能
3.楼层效果展示
4.发布时间展示
效果图
目录
tools.js
时间工具包
function gettime(){
var weeks = ["星期日","星期一","星期二","星期三","星期四","星期五","星期六"];
var date = new date();
var year = date.getfullyear();
var month = date.getmonth()+1;
var da = date.getdate();
var hour = date.gethours()<10 ? "0"+date.gethours() : date.gethours() ;
var minute = date.getminutes()<10 ? "0"+date.getminutes() : date.getminutes() ;
var second = date.getseconds()<10 ? "0"+date.getseconds() : date.getseconds() ;
var week = date.getday();
var time = year+"年"+month+"月"+da+"日 "+hour+":"+minute+":"+second +" "+weeks[week];
return time;
}
留言板.html
<!doctype html>
<html>
<head lang="en">
<meta charset="utf-8">
<title></title>
<script type="text/javascript" src="tools.js"></script>
<style>
#box {
width: 800px;
margin: 0 auto;
}
textarea {
width: 800px;
}
#li {
display: block;
border-bottom: 1px dashed #ebebeb;
margin: 10px 0;
padding: 8px 0;
}
</style>
</head>
<body>
<div id="box">
<h3>留言板 </h3>
发布人：<input type="text" id="person" value="">
共<input style="border: 0;" name="" id="louceng">
<textarea name="" id="text" rows="10"></textarea>
<input type="button" value="确认发布" id="btn" />
<h3>全部留言</h3>
<hr/>
</div>
<script>
var num = 0;
var num1 = 0;
var box = document.getelementbyid("box");
var text = document.getelementbyid("text");
var btn = document.getelementbyid("btn");
var person = document.getelementbyid("person");
var ul = document.createelement("ul");
ul.id = "ul1";
var time = document.createelement("div");
document.getelementbyid("louceng").value=num+"楼";
btn.onclick = function() {
//非空判断
if(person.value==""||person.value==null){
alert("发布人不允许为空！");
return false;
}
if(text.value==""||text.value==null){
alert("内容不允许为空！");
return false;
}
//获取时间
num = num+1;
var datetime = gettime();
time = document.createtextnode("发布时间：" + datetime);
var li = document.createelement("li");
li.id = "li";
//创建删除功能
var oa = document.createelement("a");
var oatext = document.createtextnode("删除");
oa.href = "#";
oa.appendchild(oatext);
//创建发布文本框
var fabu = document.createelement("textarea");
fabu.rows = "10";
fabu.style = "margin: 0px; width: 760px; height: 138px;";
fabu.value = text.value;
fabu.disabled="disabled";
//创建编辑功能
var ob = document.createelement("a");
var obtext = document.createtextnode("编辑");
ob.href = "#";
ob.appendchild(obtext);
//创建确认按钮
var butt = document.createelement("input");
butt.type = "button";
butt.value = "确认";
butt.style.display = "none";
//解决兼容问题
var ali = ul.getelementsbytagname("li");
if(ali.length == 0) {
ul.appendchild(li);
} else {
ul.insertbefore(li, ali[0]);
}
//添加节点
box.appendchild(ul);
var lou = document.createtextnode("第"+num+"楼");
var persons = document.createtextnode("发布人："+ person.value);
document.getelementbyid("person").value="";
var textnode = document.createtextnode("发布内容：");
document.getelementbyid("text").value="";
li.appendchild(lou);
li.appendchild(document.createelement("br"));
li.appendchild(persons);
li.appendchild(document.createelement("br"));
li.appendchild(textnode);
li.appendchild(document.createelement("br"));
li.appendchild(fabu);
li.appendchild(time);
li.appendchild(oa);
li.appendchild(ob);
li.appendchild(butt);
//删除
oa.onclick = function() {
ul.removechild(this.parentnode);
//删除时更新
num1++;//删除次数
document.getelementbyid("louceng").value=num-num1+"楼";
};
//编辑
ob.onclick = function() {
fabu.disabled = "";
butt.style.display = "block";
}
//确认更改
butt.onclick = function() {
fabu.disabled="disabled";
butt.style.display = "none";
}
//楼层展示
document.getelementbyid("louceng").value=num-num1+"楼";
}
</script>
</body>
</html>
总结
以上所述是小编给大家介绍的js实现留言板功能[楼层效果展示]，希望对大家有所帮助