Function checkExtend

node.js:23–40

(name)

var parseConfigCache = {}

function checkExtend(name) {
  var use = ' Use `dangerousExtend` option to disable.'
  if (!CONFIG_PATTERN.test(name) && !SCOPED_CONFIG__PATTERN.test(name)) {
    throw new BrowserslistError(
      'Browserslist config needs `browserslist-config-` prefix. ' + use
    )
  }
  if (name.replace(/^@[^/]+\//, '').indexOf('.') !== -1) {
    throw new BrowserslistError(
      '`.` not allowed in Browserslist config name. ' + use
    )
  }
  if (name.indexOf('node_modules') !== -1) {
    throw new BrowserslistError(
      '`node_modules` not allowed in Browserslist config.' + use
    )
  }
}

function getPathType(filepath) {
  var stats