/opt/canhelp/node_modules/next/dist/esm/build/babel/plugins
Edit: /opt/canhelp/node_modules/next/dist/esm/build/babel/plugins/optimize-hook-destructuring.js (2288B)
// matches any hook-like (the default)
const isHook = /^use[A-Z]/;
// matches only built-in hooks provided by React et al
const isBuiltInHook = /^use(Callback|Context|DebugValue|Effect|ImperativeHandle|LayoutEffect|Memo|Reducer|Ref|State)$/;
export default function({ types: t }) {
const visitor = {
CallExpression (path, state) {
const onlyBuiltIns = state.opts.onlyBuiltIns;
// if specified, options.lib is a list of libraries that provide hook functions
const libs = state.opts.lib && (state.opts.lib === true ? [
'react',
'preact/hooks'
] : [].concat(state.opts.lib));
// skip function calls that are not the init of a variable declaration:
if (!t.isVariableDeclarator(path.parent)) return;
// skip function calls where the return value is not Array-destructured:
if (!t.isArrayPattern(path.parent.id)) return;
// name of the (hook) function being called:
const hookName = path.node.callee.name;
if (libs) {
const binding = path.scope.getBinding(hookName);
// not an import
if (!binding || binding.kind !== 'module') return;
const specifier = binding.path.parent.source.value;
// not a match
if (!libs.some((lib)=>lib === specifier)) return;
}
// only match function calls with names that look like a hook
if (!(onlyBuiltIns ? isBuiltInHook : isHook).test(hookName)) return;
path.parent.id = t.objectPattern(path.parent.id.elements.reduce((patterns, element, i)=>{
if (element === null) {
return patterns;
}
return patterns.concat(t.objectProperty(t.numericLiteral(i), // TODO: fix this
element));
}, []));
}
};
return {
name: 'optimize-hook-destructuring',
visitor: {
// this is a workaround to run before preset-env destroys destructured assignments
Program (path, state) {
path.traverse(visitor, state);
}
}
};
}
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