textarea 文本框 实现右下角展现 动态字数

文本框CSS.textarea-style{border:1px solid #000001;border-radius:5pt;height:60pt;font-size:10pt;margin-bottom: 2vh;width:100%;color: #000001;overflow-x:hidden;text-indent:20px}HTML<textarea id="handledMsg" maxlength="200" cols="70" rows="5" class="textarea-style"placeholder="请输入处理方法,不超过200字" onkeyup="setLength(this,200,'wordsLength');"></textarea><span id="wordsLength" style="position:absolute; right:5px; bottom:3vh;font-size:12px; color:#BDCADA">0/200</span>JSfunction setLength(obj,maxlength,id){var num=maxlength-obj.value.length;var leng=id;if(num<0){num=0;}document.getElementById(leng).innerHTML=num+"/200";}