Andrew Clark 05dc814cf0 Remove IIFE wrappers from dev invariant checks (#16963) ...

The error transform works by replacing calls to `invariant` with
an `if` statement.

Since we're replacing a call expression with a statement, Babel wraps
the new statement in an immediately-invoked function expression (IIFE).
This wrapper is unnecessary in practice because our `invariant` calls
are always part of their own expression statement.

In the production bundle, the function wrappers are removed by Closure.
But they remain in the development bundles.

This commit updates the transform to confirm that an `invariant` call
expression's parent node is an expression statement. (If not, it throws
a transform error.)

Then, it replaces the expression statement instead of the expression
itself, effectively removing the extraneous IIFE wrapper.

2019-09-30 11:14:51 -07:00

..

__snapshots__

Remove IIFE wrappers from dev invariant checks (#16963)

2019-09-30 11:14:51 -07:00

invertObject-test.js

Drop the year from Facebook copyright headers and the LICENSE file. (#13593)

2018-09-07 15:11:23 -07:00

transform-error-messages.js

Remove IIFE wrappers from dev invariant checks (#16963)

2019-09-30 11:14:51 -07:00