限制文本框字数_layui textarea 最大输入内容 - wpsshop博客

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id="body-data-0098" attrv="38750"></div><div class="article_box" style="overflow: hidden;"><div class="article_channel"><div class="channel_top_line"><div class="cn_t_l"></div><div class="cn_t_r"></div></div><div class="article_channel_info">当前位置:   <a href="/article/list/1">article</a>  >  正文 </div></div><div class="article_title"><h1>限制文本框字数_layui textarea 最大输入内容</h1></div><div class="article_info"><div class="article_c_info">          作者：IT小白 | 2024-03-15 03:40:26</div><div class="article_click" style="width: 140px;"><p class="operation-b-img operation-b-img-active"><i class="img-up  txclick" attc="upclick" attn="0"></i><span class="num">          赞</span></p><p class="operation-b-img operation-b-img-active"><i class="img-down  txclick" attc="downclick" attn="0"></i><span class="num">踩</span></p></div></div><div class="article_intro">layui textarea 最大输入内容</div><div class="article_content article_contentheight">
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        <link rel="stylesheet" href="https://csdnimg.cn/release/blogv2/dist/mdeditor/css/editerView/ck_htmledit_views-044f2cf1dc.css">
                <div id="content_views" class="markdown_views prism-atom-one-dark">
                    <svg xmlns="http://www.w3.org/2000/svg" style="display: none;">
                        <path stroke-linecap="round" d="M5,0 0,2.5 5,5z" id="raphael-marker-block" style="-webkit-tap-highlight-color: rgba(0, 0, 0, 0);"></path>
                    </svg>
                    <p>实现文本框字数统计<br> <img src="https://img-blog.csdnimg.cn/5f9e4fe1ede6471eb3c0693dc64f21a8.png" alt="在这里插入图片描述"><br> html</p> 
<pre data-index="0" class="set-code-show prettyprint"><code class="prism language-java has-numbering" onclick="mdcp.signin(event)" style="position: unset;"><span class="token operator"><</span>div <span class="token keyword">class</span><span class="token operator">=</span><span class="token string">"layui-input-inline"</span><span class="token operator">></span>
                    <span class="token operator"><</span>textarea <span class="token keyword">class</span><span class="token operator">=</span><span class="token string">"layui-textarea"</span> id<span class="token operator">=</span><span class="token string">"reason"</span> name<span class="token operator">=</span><span class="token string">"reason"</span> v<span class="token operator">-</span>model<span class="token operator">=</span><span class="token string">"reason"</span> maxlength<span class="token operator">=</span><span class="token string">"200"</span> onkeyup<span class="token operator">=</span><span class="token string">"setLength(this,200,'wordsLength');"</span>
                              style<span class="token operator">=</span><span class="token string">"width:380px;margin-top:7px;height:75px;max-height:400px;overflow-x:auto;line-height:24px;"</span>
                              rows<span class="token operator">=</span><span class="token string">"3"</span> <span class="token operator">></span><span class="token operator"><</span><span class="token operator">/</span>textarea<span class="token operator">></span>
                <span class="token operator"><</span>span id<span class="token operator">=</span><span class="token string">"wordsLength"</span> style<span class="token operator">=</span><span class="token string">"position:absolute; right:-188px; bottom:-3vh;font-size:13px; color:#BDCADA"</span><span class="token operator">></span><span class="token number">0</span><span class="token operator">/</span><span class="token number">200</span><span class="token operator"><</span><span class="token operator">/</span>span<span class="token operator">></span>
<span class="token operator"><</span><span class="token operator">/</span>div<span class="token operator">></span>
<div class="hljs-button signin active" data-title="登录复制" data-report-click="{"spm":"1001.2101.3001.4334"}"></div></code><ul class="pre-numbering" style=""><li style="color: rgb(153, 153, 153);">1</li><li style="color: rgb(153, 153, 153);">2</li><li style="color: rgb(153, 153, 153);">3</li><li style="color: rgb(153, 153, 153);">4</li><li style="color: rgb(153, 153, 153);">5</li><li style="color: rgb(153, 153, 153);">6</li></ul></pre> 
<p>js</p> 
<pre data-index="1" class="set-code-show prettyprint"><code class="has-numbering" onclick="mdcp.signin(event)" style="position: unset;"><script>
    // 限制文本框字数
    function setLength(obj,maxlength,id){
        var num=maxlength-obj.value.length;//获取文本框输入内容的长度
        var leng=id;//获取右下角显示的id
        if(num<0){
            num=0;//如果文本框文字小于零则让它显示为零
        }
        document.getElementById(leng).innerHTML=num+"/200";
        //通过id获取到span标签在页面上的显示并对它的值进行拼接,就是把计算出来的结果+最大限制字数
    }
</script>
<div class="hljs-button signin active" data-title="登录复制" data-report-click="{"spm":"1001.2101.3001.4334"}"></div></code><ul class="pre-numbering" style=""><li style="color: rgb(153, 153, 153);">1</li><li style="color: rgb(153, 153, 153);">2</li><li style="color: rgb(153, 153, 153);">3</li><li style="color: rgb(153, 153, 153);">4</li><li style="color: rgb(153, 153, 153);">5</li><li style="color: rgb(153, 153, 153);">6</li><li style="color: rgb(153, 153, 153);">7</li><li style="color: rgb(153, 153, 153);">8</li><li style="color: rgb(153, 153, 153);">9</li><li style="color: rgb(153, 153, 153);">10</li><li style="color: rgb(153, 153, 153);">11</li><li style="color: rgb(153, 153, 153);">12</li></ul></pre>
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