添加< script>到< head>从Play Framework 2中的scala模板标签 [英] Add <script> to the <head> from scala template tags in Play Framework 2
问题描述
我想从标签中将javascript添加到网页的<head>.
I would like to add javascript to the <head> of my webpage from within tags.
这是我在页面上使用的moreScripts等效项:
This is the moreScripts equivalent I'm using on my pages:
main.scala.html
@(title: String, scripts: Html = Html(""))(content: Html)
<!DOCTYPE html>
<html lang="nl">
<head>
<title>@title</title>
<meta http-equiv="content-type" content="text/html; charset=utf-8" />
<script src="//ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js"></script>
@scripts
</head>
<body>
@content
</body>
</html>
page.scala.html
@scripts = {
<script type="text/javascript">
$(document).ready(function() {
alert(1);
});
</script>
}
@main("Title", scripts) {
<p>page content</p>
}
到目前为止一切顺利！但是，我想在我编写的标记(组件)中执行相同的操作，该标记需要在网页中包含一些javascript代码.
So far so good! However I want to do the same from within a tag (component) I've written that needs to include some javascript code into the webpage.
我的问题是如何将<script>元素从标记传递到main.scala.html?
My question is how can I pass a <script> element from the tag to the main.scala.html?
所以page.scala.html将是:
page.scala.html
@import tags._
@main("Title") {
@mytag("green")
}
mytag.scala.html
@(color: String)
<script type="text/javascript">
$(document).ready(function() {
alert('@color');
});
</script>
<p>Some more content</p>
在这种情况下，<script>标签呈现在HTML页面的一半，我想将<script>标签传递到@scripts变量中，以便可以在<head>标签内部呈现.
In this case the <script> tag is rendered halfway the HTML page, I want to pass the <script> tag into the @scripts variable so it can be rendered inside the <head> tag.
推荐答案
好的，我想出了一个更好的解决方案恕我直言.
Ok, I've come up with a nicer solution IMHO.
我创建了以下标签:
script.scala.html
@(content: Html)
@{
var additionalScripts = ctx().args.get("additionalScripts").asInstanceOf[List[Html]];
if(additionalScripts == null) {
additionalScripts = new ArrayList[Html]();
ctx().args.put("additionalScripts", additionalScripts)
}
val added = additionalScripts.add(content);
}
renderscripts.scala.html
@additionalScripts = @{ctx().args.get("additionalScripts").asInstanceOf[List[Html]]}
@if(additionalScripts != null) {
@for(additionalScript <- additionalScripts) {
@additionalScript
}
}
在您的main.scala.html中，您可以使用:
In your main.scala.html you can use:
@(title: String)(content: Html)
@import tags._
<!DOCTYPE html>
<html lang="nl">
<head>
<title>@title</title>
<script src="//ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js"></script>
@renderscripts()
</head>
<body>
@content
</body>
</html>
您可以使用以下方法在模板或标签中指定其他脚本:
You can specify additional script(s) in your templates or tags using:
@import tags._
@script {
<script type="text/javascript">
$(document).ready(function() {
alert('This will be in the head!');
});
</script>
}
这很好，对吗? :)
也许有人可以使用他们的Scala魔术来清理或增强我的代码:)
Maybe someone can clean up or enhance my code using their Scala magic :)
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