仿新浪微博发布评论

1.html

<div class="main">
    <span>你想对楼主说点什么</span>
    <span class="tag">你最多可以输入30个字符</span>
    <textarea id="text" cols="30" rows="10" maxlength="30" class="text" spellcheck="false"></textarea><br>
    <input type="button" value="发 表" id="ipt">
    <div id="txt" ></div>
</div>

2.css样式

.main{
    width: 800px; 
    margin:20px auto;
} 

span{ 
    display: inline-block;
    width: 200px;
    height: 25px;
    line-height: 25px; 
    vertical-align: middle; 
    text-align: left; 
    margin-bottom: 10px; 
}

.tag{
    font-size: 13px;
    margin-left: 370px;
    vertical-align: bottom;
    text-align: center;
    margin-bottom: 0;
}

.text{
    width: 750px;
    height: 180px;
    margin:0 auto;
    resize:none;
}

input{
    display: inline-block;
    width: 80px;
    height: 50px;
    background: #E2526F;
    border: 0;
    margin-left: 670px;
    margin-top: 10px;
}

.creatediv{
    width: 675px;
    height: 80px;
    border: 1px solid gray;
    position: relative;
    margin-top: 10px;
    padding-left: 75px;
}

.createinput{
    width: 80px;
    height: 30px;
    position:absolute;
    right: 5px;
    bottom:5px;
}

.createimg{
    width: 50px;
    height: 50px;
    position: absolute;
    top: 15px;
    left: 15px;
}

.createdivs{
    width:600px;
    height:50px;
    position: absolute;
    top: 15px;
    left: 85px;
}

3.js

var textarea = document.getElementById("text");
var ipt = document.getElementById("ipt");
var txt = document.getElementById("txt");
ipt.onclick = function(){
    var txtValue = textarea.value;
        if(txtValue.length>0){
        var divs = document.createElement("div");
        var imgs = document.createElement("img");
        var ps = document.createElement("p");
        var inputs = document.createElement("input");
        divs.setAttribute("class","creatediv");
        imgs.setAttribute("class","createimg");
        ps.setAttribute("class","createdivs");
        inputs.setAttribute("class","createinput");
        img.src = "pic/1.jpg";
        input.type = "button";
        inputs.value = "删除";
        ps.innerHTML = txtValue;
        divs.appendChild(imgs);
        divs.appendChild(ps);
        divs.appendChild(inputs);
        if(txt.children.length == 0){
            txt.appendChild(divs);
        }else{
            txt.insertBefore(divs,get_firstChild(txt));
        }

        inputs.onclick = function(){
            this.parentElement.parentElement.removeChild(this.parentElement)
        }
    }
}

var textarea = document.getElementById("text");
var inputs = document.getElementById("ipt");
var txt = document.getElementById("txt");
ipt.onclick = function(){
    var txtValue = textarea.value;
    if(txtValue.length>0){
        var divs = document.createElement("div");
        var imgs = document.createElement("img");
        var ps = document.createElement("p");
        var inputs = document.createElement("input");
        divs.setAttribute("class","creatediv");
        imgs.setAttribute("class","createimg");
        ps.setAttribute("class","createdivs");
        inputs.setAttribute("class","createinput");
        imgs.src = "pic/1.jpg";
        inputs.type = "butto";
        inputs.value = "删除";
        ps.innerHTML = txtValue;
        divs.appendChild(imgs);
        divs.appendChild(ps);
        divs.appendChild(inputs);
        if(txt.children.length == 0){
            txt.appendChild(divs)
        }else{
            txt.appendChild(divs,get_firstChild(txt));
        }

        inputs.onclick = function(){
            this.parentElement
                .parentElement
                .removeChild(this.parentElement)
        }
    }
}