使用CKEditor 5的多个文本区域

document.querySelector() 返回第一个匹配的元素。你需要 document.querySelectorAll()

<script src="https://cdn.ckeditor.com/ckeditor5/1.0.0-alpha.2/classic/ckeditor.js"></script>
<textarea name="content0" class="editor" id="c0">This is some sample content.</textarea>
<textarea name="content1" class="editor" id="c1">This is some sample content.</textarea>
<textarea name="content2" class="editor" id="c2">This is some sample content.</textarea>
<script>
var allEditors = document.querySelectorAll('.editor');
for (var i = 0; i < allEditors.length; ++i) {
  ClassicEditor.create(allEditors[i]);
}
</script>

我更喜欢使用foreach,而不是像@Wizard的答案那样使用for循环

document.querySelectorAll('[data-init-plugin="ckeditor"]').forEach(function (val) {
    ClassicEditor
        .create(val, {
            toolbar: ['bold', 'italic', 'link', 'bulletedList', 'numberedList'],
        })
        .catch(error => {
            console.log(error);
        });
});

这个解决方案对我有用

<script>
    CKEDITOR.on('instanceReady', function(event) {
        var editor = event.editor;
        editor.on('change', function(event) {
            // Sync textarea
            this.updateElement();
            for (var i in CKEDITOR.instances) {
            CKEDITOR.instances['ckeditor' + i].on('change', function() 
            { CKEDITOR.instances['ckeditor' + i].updateElement() });
            }
        });
    });
</script>