1. 用于切换编辑器模式:text、tree、code
JSONEditor.setMode(mode)
2. 让 mode 变成可以选择的:
const options = { modes: ['text', 'code', 'tree'] }
示例:在线JSONEditor
Ref:https://www.npmjs.com/package/jsoneditor
Ref:https://github.com/josdejong/jsoneditor/blob/master/docs/api.md#jsoneditorsetmodemode