const Msg = this.form.Msg.replace( (/%(u[0-9A-F]{4})|(%[0-9A-F]{2})/gm, $0 => { return escape($0).replace(/(%u)(w{4})/gi, '&#x$2;') }) )
Msg再传给后端就行 this.form.Msg就是输入框的内容自定义的