Is there a way to use a Ruby loop inside of HAML's :javascript region?
Inside of HAML, can we have a loop inside the :javascript region?
This will work:
- 10.upto(20) do |i|
:javascript
document.getElementById('aDiv').innerHTML += '#{i}';
and this will not:
:javascript
- 10.upto(20) do |i|
document.getElementB开发者_如何学PythonyId('aDiv').innerHTML += '#{i}';
can the code above also be made to work as well?
%html
%head
:javascript
var foo = [];
#{
limit = rand(4)+3
array = (0..limit).to_a
array.map{ |i| "foo[#{i}] = #{rand(12)};" }.join ' '
}
console.log(foo.length);
%body
Running the above code gives this output:
<html>
<head>
<script type='text/javascript'>
//<![CDATA[
var foo = [];
foo[0] = 2; foo[1] = 0; foo[2] = 11; foo[3] = 8; foo[4] = 0; foo[5] = 1;
//]]>
</script>
<body></body>
</head>
</html>
As you can see, the big #{...} block (which may span multiple lines) runs arbitrary Ruby code. The result of the last expression (in this case the map{...}.join) is converted to a string and placed in the output.
Edit for Radek: If you want to declare a variable inside you Haml template, inside your JavaScript filter (which seems like an odd desire), then you need to be sure that the result of the block to_s doesn't produce unwanted output:
This Haml...
%p
:javascript
var foo = 12;
#{x = 42}
var bar = #{x};
...produces this HTML:
<p>
<script type='text/javascript'>
//<![CDATA[
var foo = 12;
42
var bar = 42;
//]]>
</script>
</p>
Whereas this Haml...
%p
:javascript
var foo = 12;
#{x = 42; ""}
var bar = #{x};
...produces this HTML...
<p>
<script type='text/javascript'>
//<![CDATA[
var foo = 12;
var bar = 42;
//]]>
</script>
</p>
But before you do this, ask yourself: why am I creating complex Ruby variables in my view?
Shouldn't this variable have been declared by my controller?
this one works
%script
- 10.upto(20) do |i|
document.getElementById('aDiv').innerHTML += '#{i}';
Just wanted to add that the following gets you the type and CDATA, but without the funky behaviour of :javascript (I just had to implement something like this).
%script{ :type => 'text/javascript' }
\//<![CDATA[
- (10..20) do |i|
document.getElementById('aDiv').innerHTML += '#{i}';
\//]]>
加载中,请稍侯......
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