如何从 Freemarker 调用 JavaScript 函数？
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How to call JavaScript function from Freemarker?
提问by SP5RFD
I have some basic JavaScript function:
我有一些基本的 JavaScript 函数：
<script type="text/javascript">
function someTestFunction(param1, param2) {
//do something
}
</script>
and Freemarker code:
和 Freemarker 代码：
<#if something==somethingElse>
// call: someTestFunction(something, 123)
<#else>
// call: someTestFunction(somethingElse, 345)
</#if>
my question is: Is it possible, and if so, how to call someTestFunction() from inside freemarker tags?
我的问题是：是否有可能，如果有，如何从 freemarker 标签内部调用 someTestFunction()？
回答by Andy Ray
Freemarker is a java templating language, meaning it is executed on the server. javascript is executed on the client (user's browser). You cannot call a javascript function from the java server in this manner.
Freemarker 是一种 Java 模板语言，这意味着它在服务器上执行。javascript 在客户端（用户的浏览器）上执行。您不能以这种方式从 Java 服务器调用 javascript 函数。
You could do something like:
你可以这样做：
<script>
<#if something==somethingElse>
someTestFunction(something, 123);
<#else>
someTestFunction(somethingElse, 345);
</#if>
</script>
which means the javascript wll be executed on the client side depending on what server variable is set.
这意味着 javascript 将根据设置的服务器变量在客户端执行。
