HTML Textarea 800字限制的代码

<div style="position:relative">
      <textarea id="remark" class="remarkstyle" maxlength="800" onkeyup="javascript:setLength(this,800,'wordslength');"></textarea>
      <span id="wordslength" style="position:absolute; right:5px; bottom:3vh;font-size:12px; color:#BDCADA">0/800</span>
</div>
<style>
.remarkstyle{
    
    
    border:1px solid #0376FE;
    border-radius:10pt;
    height:98%;
    line-height: 1.5;
    font-size:15pt;
    margin-bottom: 2vh;
    width:100%;
    color: #000000;
    overflow-x:hidden;
    resize: none;
}
</style>
<script>
function setLength(obj,maxlength,id){
    
    
	var num=obj.value.length;
	if(num<0){
    
    
		num=0;
	}
	document.getElementById(id).innerHTML=num+"/800";
}
</script>

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转载自blog.csdn.net/weixin_44159662/article/details/110622012