Function serializeDefine

packages/vite/src/node/plugins/define.ts:205–217

(define: Record<string, any>)

 * the global `window` object directly.
 */
export function serializeDefine(define: Record<string, any>): string {
  let res = `{`
  const keys = Object.keys(define).sort()
  for (let i = 0; i < keys.length; i++) {
    const key = keys[i]
    const val = define[key]
    res += `${JSON.stringify(key)}: ${handleDefineValue(val)}`
    if (i !== keys.length - 1) {
      res += `, `
    }
  }
  return res + `}`
}

function handleDefineValue(value: any): string {
  if (typeof value === 'undefined') return 'undefined'