Unable to encode .... of type object - Prismic.Predicate.at()

Hello,

I’ve tried to use multiple predicates on a query as the example but when the code (see below) is executed I got an error: Unable to encode no-case-study of type object

const noCasesStudiesProjects = client().then(api => {
    return api
      .query([
        Prismic.Predicates.at('document.type', 'project'),
        Prismic.Predicates.at('document.tags', ['no-case-study'])
      ])
      .then(data => {
        return data.results;
      });
  });

I’m using : Nuxt 2.0.0 and prismic-javascript ^2.0.1

Any ideas ? Thanks

NB : Until yesterday, everything worked well 😕 NB2 : Seems to works in build and generate (nuxt) process 🧐

[mcrider]

Okay got a non-minified version of prismic-javascript library so i could debug it, looks like this comes down to this line: https://github.com/prismicio/prismic-javascript/blob/edd2c5b66926492dfabd0371100d9f2bc6b413c4/src/Predicates.ts#L41

Due to some awesome javascript idiosyncrasies, which may be dependent on the version of Node being used, instanceof won’t work here. Dropped in some logging, hope you find it as fascinating as I do 😛

  console.log(value); // [ 'articles', 'videos' ]
  console.log(typeof value); // object
  console.log(value instanceof Array); // false
  console.log(Array.isArray(value)); // true
  console.log(Object.prototype.toString.call(value)); // [object Array]

Can we switch to use one of the last two methods to test if its an array? Both fix the issue. @arnaudlewis ?

[Atinux]

Thank you so much @mcrider for finding a workaround.