Step 4 - Understanding the query, binding objects about codeql-javascript-unsafe-jquery-plugin

[github-learning-lab]

⌨️ Activity: Find the 1st argument to all calls to $

We want to identify the expression that is used as the first argument for each call, such as in $(<first-argument>).

1. Edit the file calls-to-dollar-arg.ql and start by copying your previous query.
2. Use the auto-completion feature to find the class that represents simple expressions, and declare a variable (eg. dollarArg) that belongs to this class.
3. Use auto-completion again on your dollarCall variable of type CallExpr to guess the predicate that gets the argument at a 0-based index. Start typing get and browse the predicates, and their contextual documentation.
4. Combine this with your logic from the previous step with an and in the where clause.
5. Once you're happy with the results, submit your solution.

[github-learning-lab]

Ooops! The query you submitted in b472b25 didn't find the right results. Have a look at the comment.

To submit a new iteration of your query, you just have to push a new commit to the same branch (the default branch or the PR branch).