warn-once.js 224 B

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  1. 'use strict'
  2. let printed = {}
  3. module.exports = function warnOnce(message) {
  4. if (printed[message]) return
  5. printed[message] = true
  6. if (typeof console !== 'undefined' && console.warn) {
  7. console.warn(message)
  8. }
  9. }