Custom validator function that checks if object properties exist in Vue.js

Sometimes when passing an object as a prop to a Vue component it's important to check if it contains all expected properties. In Vue.js this can be accomplished by writing a custom validator function.

What's expected?

  must: true,
  provide: true,
  properties: true


props: {
  myProp: {
    type: Object,
    required: true,
    validator: (obj) => {
      const missingProperties = [
      ].filter((property) => !obj.hasOwnProperty(property))

      return missingProperties.length === 0
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I've been working more with Vue.js lately and got familiar with two slightly different ways of testing Vue.js components.

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