I want to make sure a javascript variable is getting the correct values passed into it when setting it to a ruby variable.
<script type="text/javascript" charset="utf-8">
var test = <%= @test || 'null' %>;
document.write(test);
</script>
However, there doesn't seem to be any output whatsoever. I've tried just document.write("somethinganything") and I still don't see any output. Is it supposed to appear on webpage or terminal? I couldn't find any in both.
document.write prints to the webpage. You should try using console.log to print to the terminal.
You shouldn't use document.write() to print out visible content unless the script block is in the <body>.
Some older browsers will not support that, and if the script block is in the <head> it will not write anything visible.
Try one of the following solutions instead:
// Append a text node to the end of your body
window.onload = function() {
var txt = document.createTextNode(test);
document.body.appendChild(txt);
};
or
// Log the text to your javascript console
console.log(test);
or
// Alert the text in a popup
window.alert(test);
document.write() works from script blocks in the <head> - do you have some supporting documentation for why you think it doesn't?you have to write console.log("test");
@testvariable could contain a value that creates invalid JavaScript so then it would stop before it gets to thedocument.write(). Yourdocument.write("somethinganything")should work, as you can see here: jsfiddle.net/Aa5nn, unless you have it after the samevar test = ...line with an error.var test ...line due to some syntax error and never makes it to the followingdocument.writeline