webhook/node_modules/eslint-plugin-github/lib/rules/require-passive-events.js

const passiveEventListenerNames = new Set(['touchstart', 'touchmove', 'wheel', 'mousewheel'])

const propIsPassiveTrue = prop => prop.key && prop.key.name === 'passive' && prop.value && prop.value.value === true

module.exports = {
  meta: {
    docs: {}
  },

  create(context) {
    return {
      ['CallExpression[callee.property.name="addEventListener"]']: function(node) {
        const [name, listener, options] = node.arguments
        if (!listener) return
        if (name.type !== 'Literal') return
        if (!passiveEventListenerNames.has(name.value)) return
        if (options && options.type === 'ObjectExpression' && options.properties.some(propIsPassiveTrue)) return
        context.report(node, `High Frequency Events like "${name.value}" should be \`passive: true\``)
      }
    }
  }
}