@putout/plugin-remove-unused-variables/lib/get-vars/jsx.js

🐊Putout plugin adds ability to find and remove unused variables

import {types} from 'putout';

const {
    isIdentifier,
    isJSXIdentifier,
} = types;

export default (use) => ({
    JSXOpeningElement(path) {
        const {node} = path;
        const {name} = node;
        
        if (/^[A-Z]/.test(name.name))
            use(path, name.name);
        
        use(path, 'React');
    },
    
    JSXFragment(path) {
        use(path, 'React');
    },
    
    JSXSpreadAttribute(path) {
        const argPath = path.get('argument');
        
        if (argPath.isIdentifier())
            return use(path, argPath.node.name);
    },
    
    JSXMemberExpression(path) {
        const {node} = path;
        const {object} = node;
        
        if (isJSXIdentifier(object))
            use(path, object.name);
    },
    
    JSXExpressionContainer(path) {
        const {node} = path;
        const {expression} = node;
        
        if (isIdentifier(expression))
            use(path, expression.name);
    },
});