How to replace function name with a babel plugin - babeljs

Question

Is it possible to create a babel plugin that will change some a functions name ?
I can't seems to find this in the documentation.
Example:
myObject.doSomething() ==> babel ==> myObject.___doSomething()
Thanks

Answer 1

You can get the AST of your code in astexplorer. And you can see it's about a CallExpression and MemberExpression. So search babel-types API in babel-types source code, it's very clear of how to create a babel type or judge a babel-type like this:
defineType("MemberExpression", {
builder: ["object", "property", "computed"],
visitor: ["object", "property"],
aliases: ["Expression", "LVal"],
fields: {
object: {
validate: assertNodeType("Expression")
},
property: {
validate(node, key, val) {
let expectedType = node.computed ? "Expression" : "Identifier";
assertNodeType(expectedType)(node, key, val);
}
},
computed: {
default: false
}
}
});

Answer 2

Following are two different ways to do it (either with the Program visitor or with the FunctionDeclaration visitor):
export default function ({types: t}) {
return {
visitor: {
Program(path) {
path.scope.rename('doSomething', '___doSomething');
},
FunctionDeclaration(path) {
if (path.node.id.name === 'doSomething') {
path.node.id.name = '___doSomething'
}
}
}
};
}
Note that these are not safe since they can override an existing name. You can use the path.scope.generateUidIdentifier("uid"); command to generate a unique identifier and use that but you wont be able to define the generated name.
Example - http://astexplorer.net/#/o5NsNwV46z/1