43 lines
895 B
JavaScript
43 lines
895 B
JavaScript
export default function () {
|
|
var immutabilityVisitor = {
|
|
enter(path, state) {
|
|
var stop = () => {
|
|
state.isImmutable = false;
|
|
path.stop();
|
|
};
|
|
|
|
if (path.isJSXClosingElement()) {
|
|
path.skip();
|
|
return;
|
|
}
|
|
|
|
if (path.isJSXIdentifier({ name: "ref" }) && path.parentPath.isJSXAttribute({ name: path.node })) {
|
|
return stop();
|
|
}
|
|
|
|
if (path.isJSXIdentifier() || path.isIdentifier() || path.isJSXMemberExpression()) {
|
|
return;
|
|
}
|
|
|
|
if (!path.isImmutable()) stop();
|
|
}
|
|
};
|
|
|
|
return {
|
|
visitor: {
|
|
JSXElement(path) {
|
|
if (path.node._hoisted) return;
|
|
|
|
var state = { isImmutable: true };
|
|
path.traverse(immutabilityVisitor, state);
|
|
|
|
if (state.isImmutable) {
|
|
path.hoist();
|
|
} else {
|
|
path.node._hoisted = true;
|
|
}
|
|
}
|
|
}
|
|
};
|
|
}
|