我正在尝试使用从数组派生的选项在 TinyMCE 中创建工具栏按钮。我已按照 Tiny 网站上的示例进行操作，按钮已按预期生成。这是代码：
var mergeFields = {one: "first", two: "second", three: "third"};
tinymce.init({
selector: 'textarea',
menubar: false,
toolbar: 'mergefields',
setup: function (editor) {
editor.ui.registry.addMenuButton('mergefields', {
text: 'Merge Fields',
fetch: function (callback) {
var items = [];
for (var fieldName in mergeFields) {
var menuItem = {
type: 'menuitem',
text: mergeFields[fieldName],
onAction: function() {
// The problem: this function always inserts the last element of the array
// instead of the expected fieldName associated with this menuItem
editor.insertContent(fieldName);
}, …