我们使用了带有“不可编辑”插件的 TinyMCE 编辑器。我们试图删除不可编辑的内容，它被删除了。如何限制不可编辑内容的删除（删除/退格）操作？
下面是我的代码：
tinymce.init({
selector: "#myeditablediv",
plugins: "advlist table lists image paste link pagebreak noneditable help",
noneditable_noneditable_class: "mceNonEditable",
menubar: false,
inline: true,
height: 500,
paste_data_images: true,
toolbar_sticky: true,
toolbar:
"bold italic underline | superscript subscript | formatselect | bullist | code pagebreak | link image | COC | table | removeformat | help",
formats: {
editable: {
inline: "span",
styles: { borderBottom: "2px solid gray" },
classes: "mceEditable"
}
},
setup: function (editor) {
editor.ui.registry.addButton("COC", {
text: "<b style='font-size:large;font-weight:bold;'>{CC}</b>", …