executeScriptSync method
同步执行脚本语句
Implementation
@override
Map<String, String> executeScriptSync(String pageName, String script) {
var map = <dynamic, dynamic>{};
map[FairMessage.LOAD_JS] = script;
var msg = FairMessage(pageName, FairMessage.VARIABLE, map);
var from = msg.from();
final Map<String, String> reMap = jsonDecode(_channel!.sendCommonMessageSync(jsonEncode(from)));
return reMap;
}