angularjs表达式中的注释

Question

I have some HTML tags which have ng-clicks and ng-ifs. Inside the respective expressions, I make function calls and pass in parameters, some of which are literals (mostly just true or false). So I would like to add a comment as to what a literal means, but angular doesn't seem to be able to parse this correctly. (I realize passing literals is not the brightest idea but I would nevertheless like to know the answer)

<button class='someclass' ng-click='somefunction(val1, val2, true /* explanation for literal */)' > </button>

How do I add comments in angular expressions?

Answer 1

No, comments are not supported. Parser sees / as an mathematical operator (see source code ) which expects primary expression after it: eg something starting with ( , or [ , etc. However there is no valid expression in javascript that can include * immediately after / character. So parser throws an exception: Token '*' not a primary expression .

Answer 2

While the Angular documentation doesn't explicitly say that JavaScript comments are not supported. I would assume they are not.

Angular Expressions are only a subset of some JavaScript (and some added features like filters).

Answer 3

Why can't you pass these comments as separate parameters instead of appending other parameters? Even though you achieve doing this somehow it would be not very good design.