在summernote中设置最大长度

Question

在summernote中设置最大长度

7

如何在Summernote中应用maxlength？在这里，将maxlength应用于文本区域无效。

https://github.com/summernote/summernote

$("#textareaid").summernote({
      toolbar:[
        ['style', ['style']],
        ['font', ['bold', 'italic', 'underline', 'superscript', 'subscript', 'strikethrough', 'clear']],
        ['fontname', ['fontname']],     
        ['fontsize', ['fontsize']], 
        ['color', ['color']],
        ['para', ['ul', 'ol', 'paragraph']],
        ['height', ['height']],
        ['table', ['table']],
        ['insert', ['link', 'picture', 'video', 'hr']],
        ['view', ['fullscreen', 'codeview']],
        ['help', ['help']]      
      ],                  
      height: 250,  
      focus: true 
});

$("#summernotediv").code("");           
$('.note-help-dialog .row-fluid >p').hide();    
$('.note-editable').css('overflow','auto'); 
$('.note-image-input').prev('h5').remove();
$('.note-image-input').remove();

- Reshma

4个回答

8

基于Angel Fraga Parodi的回答，我添加了一些应该始终允许的关键码，如删除、箭头键或ctrl+x/ctrl+c。另外，粘贴的代码也不再起作用了。这是更新后的版本：

<div class="summernote" ></div>
<h5 id="maxContentPost" style="text-align:right"></h5>
<script>
        $(document).ready(function () {
            $('.summernote').summernote({
                toolbar: [
                  ['style', ['bold', 'italic', 'underline', 'clear']]
                ],
                placeholder: 'Leave a comment ...',
                callbacks: {
                    onKeydown: function (e) { 
                        var t = e.currentTarget.innerText; 
                        if (t.trim().length >= 400) {
                            //delete keys, arrow keys, copy, cut, select all
                            if (e.keyCode != 8 && !(e.keyCode >=37 && e.keyCode <=40) && e.keyCode != 46 && !(e.keyCode == 88 && e.ctrlKey) && !(e.keyCode == 67 && e.ctrlKey) && !(e.keyCode == 65 && e.ctrlKey))
                            e.preventDefault(); 
                        } 
                    },
                    onKeyup: function (e) {
                        var t = e.currentTarget.innerText;
                        $('#maxContentPost').text(400 - t.trim().length);
                    },
                    onPaste: function (e) {
                        var t = e.currentTarget.innerText;
                        var bufferText = ((e.originalEvent || e).clipboardData || window.clipboardData).getData('Text');
                        e.preventDefault();
                        var maxPaste = bufferText.length;
                        if(t.length + bufferText.length > 400){
                            maxPaste = 400 - t.length;
                        }
                        if(maxPaste > 0){
                            document.execCommand('insertText', false, bufferText.substring(0, maxPaste));
                        }
                        $('#maxContentPost').text(400 - t.length);
                    }
                }
            });
        });
</script>

- Hokascha

非常好... 我也注意到一些命令问题。你的快捷键中缺少了全选 (ctrl + a )，我已经添加了它。!(e.keyCode == 65 && e.ctrlKey) - Bruno

0

我基于Summernote的.note-editable类编写了这个jQuery解决方案。

//Contador de Caracteres para summernote
$(".note-editable").on("keypress", function(){
    var limiteCaracteres = 255;
    var caracteres = $(this).text();
    var totalCaracteres = caracteres.length;

    //Update value
    $("#total-caracteres").text(totalCaracteres);

    //Check and Limit Charaters
    if(totalCaracteres >= limiteCaracteres){
        return false;
    }
});

要显示字符计数，只需在<div class="summernote"></div>后添加<span id="total-caracteres"></span>。

- Fernando Shaiane Leoncio

0

使用'onKeydown'回调函数来检查编辑器内容的当前长度，并在该值大于或等于您选择的最大长度时可能阻止进一步输入。

onKeydown: function(e) {
            if (e.keyCode == 8 /*and other buttons that should work even if MAX_LENGTH is reached*/) 
                return;
            if ($(".note-editable").text().length >= MAX_LENGTH){
                e.preventDefault();
                return;
            }    
},

- Varsha

网页内容由stack overflow 提供, 点击上面的

可以查看英文原文，
原文链接

- Angel Fraga Parodi · Accepted Answer

你可以使用回调对象和preventDefault函数来实现它。

这个示例的限制是400。

  function registerSummernote(element, placeholder, max, callbackMax) {
    $(element).summernote({
      toolbar: [
        ['style', ['bold', 'italic', 'underline', 'clear']]
      ],
      placeholder,
      callbacks: {
        onKeydown: function(e) {
          var t = e.currentTarget.innerText;
          if (t.length >= max) {
            //delete key
            if (e.keyCode != 8)
              e.preventDefault();
            // add other keys ...
          }
        },
        onKeyup: function(e) {
          var t = e.currentTarget.innerText;
          if (typeof callbackMax == 'function') {
            callbackMax(max - t.length);
          }
        },
        onPaste: function(e) {
          var t = e.currentTarget.innerText;
          var bufferText = ((e.originalEvent || e).clipboardData || window.clipboardData).getData('Text');
          e.preventDefault();
          var all = t + bufferText;
          document.execCommand('insertText', false, all.trim().substring(0, 400));
          if (typeof callbackMax == 'function') {
            callbackMax(max - t.length);
          }
        }
      }
    });
  }


$(function(){
  registerSummernote('.summernote', 'Leave a comment', 400, function(max) {
    $('#maxContentPost').text(max)
  });
});

<!-- include libraries(jQuery, bootstrap) -->
<link href="https://netdna.bootstrapcdn.com/bootstrap/3.3.5/css/bootstrap.css" rel="stylesheet">
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.2.1/jquery.js"></script>
<script src="https://netdna.bootstrapcdn.com/bootstrap/3.3.5/js/bootstrap.js"></script>

<!-- include summernote css/js -->
<link href="https://cdnjs.cloudflare.com/ajax/libs/summernote/0.8.9/summernote.css" rel="stylesheet">
<script src="https://cdnjs.cloudflare.com/ajax/libs/summernote/0.8.9/summernote.js"></script>

<div class="container">
  <div class="row">
    <div class="col-xs-12">
      <div class="summernote"></div>
    </div>
    <div class="col-xs-12 text-right">
      <span id="maxContentPost"></span>
    </div>
  </div>
</div>