问题
First off: I'm not talking about multi line commenting, I don't think. The problem is occurring when there is a space between the / and the * such as
draw.arc(x, y, radius, Math.PI/2, Math.PI/2, true);
In dreamweaver, the text
/2,Math.PI/
Goes green.
I've googled but to no avail. I'm sure it's something dumb but I'm stumped.
Also note: still occurs when the Math.PI formula is defined as a variable
回答1:
Dreamweaver is interpreting that as a regex for syntax highlighting.
The regex notation /regex/ is the most notoriously difficult part to parse in all of Javascript.
Your code is fine. You could try adding spaces around the /. I've often seen that work.
回答2:
As stated below, it's a parsing issue with Dreamweaver - interpreting your syntax as a regular expression.
A solution to this problem would be to create a variable for that value. Additionally, it's more efficient than doing the same operation more than once.
var piOver2 = Math.PI / 2;
draw.arc(x, y, radius, piOver2, piOver2, true);
回答3:
It is something dumb: Dreamweaver has a bug in it. Your code must still execute. That is a perfectly valid sequence of characters, that does not result in a comment.
来源：https://stackoverflow.com/questions/19750685/expressions-with-slashes-are-highlighted-incorrectly