index.js

import { pipeline, env } from 'https://cdn.jsdelivr.net/npm/@xenova/[email protected]';

// skip local model check
env.allowLocalModels = false;

var PROMPT_INPUT = `The pickle has a job as a [MASK] and feels so-so about it.`
var OUTPUT_LIST = []

async function fillIn(){
  const fillInTask = await pipeline('fill-mask', 'Xenova/bert-base-uncased');
  
  var out = await fillInTask(PROMPT_INPUT);
  
  await out.forEach(o => {
    console.log(o) // yields { score, sequence, token, token_str } for each result
    OUTPUT_LIST.push(o.sequence) // put only the full sequence in a list
  })
  
  console.log(OUTPUT_LIST)

  return await OUTPUT_LIST
}