Customize the grid control's Expression Editor.
How to implement a custom function for the Expression Editor.
基于Vue 3开发的公式编辑器，支持键盘和按键输入，支持变量输入和求值
Implements custom functions for the Expression Editor in the Web End-User Report Designer.
Custom functions in the Expression Editor in the End-User Report Designer.
Create calculated columns on the fly.
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