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rule.js
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rule.js
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/*
NOTE: It is recommended to play around with the ATTENTION parts to see the difference!
*/
function example_one()
{
var input = document.getElementById('inputValue_one').value;
var x = 1;
var y = 2;
//function outputs the User given input, in browser
function Show(text)
{
var result = document.getElementById('result_one');
result.innerHTML = "Your input is " + text;
}
//------ATTENTION: Parse error, if function is put inside parenthesis------//
x = y
Show(input);
}
//Activates examples
function Keywords(RETURN, THROW, BREAK, CONTINUE)
{
if(RETURN)
{
var result = document.getElementById('result_two');
var user_input = document.getElementById('inputValue_two').value;
result.innerHTML = example_two(user_input);
}
else if(THROW)
{
example_three();
}
else if(BREAK)
{
example_four();
}
else if(CONTINUE)
{
example_five();
}
}
//RETURN
function example_two(text)
{
//------ATTENTION: No parse error, but doesn`t return "text"------//
return
text;
}
//THROW
function example_three()
{
var result = document.getElementById('result_three');
try
{
//Always true, so error is always thrown
if(true)
{
//------ATTENTION: Parse error, if there is a newline after throw------//
throw "Error-Message"
}
}
catch(error)
{
//Outputs error
result.innerHTML = error;
}
}
//BREAK
function example_four()
{
//Deleting old content
var result = document.getElementById('result_four');
result.innerHTML = "";
//Preparing <li></li>
var tag = document.createElement("LI");
//This is how a label is defined.
firstLabel:
for(var i = 0; i < 4; i++)
{
//Appending "i" values as text into browser
var node = document.createTextNode(i + ", ");
tag.appendChild(node);
result.appendChild(tag);
if(i === 1)
{
//Another label
secondLabel:
for(var j = 0; j < 4; j++)
{
//Appending a message into browser
node = document.createTextNode("-----Trying to break first label------, ");
tag.appendChild(node);
result.appendChild(tag);
//------ATTENTION: No parse error, but does break second Label not first------//
break
firstLabel;
}
}
}
}
//CONTINUE
function example_five()
{
//Deleting old content
var result = document.getElementById('result_five');
result.innerHTML = "";
//Preparing <li></li>
var tag = document.createElement("LI");
//This is how a label is defined.
firstLabel:
for(var i = 0; i < 4; i++)
{
//Appending "i" values as text into browser
var node = document.createTextNode(i + ", ");
tag.appendChild(node);
result.appendChild(tag);
//Another label
secondLabel:
for(var j = 0; j < 2; j++)
{
//Appending "j" values as text into browser
node = document.createTextNode("j=" + j + ", ");
tag.appendChild(node);
result.appendChild(tag);
//------ATTENTION: No parse error, but does continue second Label not first------//
continue
firstLabel;
}
}
}