Question

假设我可以访问可能使用JavaScript变量foo的完整源代码。

部分源代码如下所示：

foo.bar = 'baz';

(function(a, b, c) {
    a();
    b.bar = 'whee';
    c();
}(fn, foo, fn));

是否有可用的工具（ESLint规则，NPM模块等）可以识别foo变量的所有用法？我正在查看变量的所有访问列表，包括在范围内并包括嵌套对象。所以，它必须确定：

全局范围内的foo.bar用法
函数调用中的foo用法
b.bar来电是foo.bar

Answer 1

http://ternjs.net/doc/manual.html#infer似乎是一个很好的领导：

infer.findRefs(ast: AST, scope: Scope, name: string, refScope: Scope, f: fn(AST, Scope))
Will traverse the given syntax tree, using scope as the starting scope, looking for references to variable name that resolve to scope refScope, and call f with the node of the reference and its local scope for each of them.

infer.findPropRefs(ast: AST, scope: Scope, objType: Obj, propName: string, f: fn(AST))
Analogous to findRefs, but used to look for references to a specific property instead. Whereas findRefs is precise, this is dependent on type inference, and thus can not be relied on to be precise.

如何通过函数调用找到JavaScript变量的传递用法？

1 个答案: