JSON stringify replacer (no circular deps) pretty printer

stringify.ts

import parse5 from 'parse5'

var src = `
{#if name}
    <script>
        console.log('not top level')
    </script>
{/if}
<ul>
    {#each cats as cat}
        <script>
            console.log('not top level')
        </script>
    {/each}
</ul>
{#await promise}
    <script>
        console.log('not top level')
    </script>
{:then number}
    <script>
        console.log('not top level')
    </script>
{:catch error}
    <script>
        console.log('not top level')
    </script>
{/await}
<p>{@html <script> consolelog('not top level')</script>}</p>
<!-- p{ color: blue; }</script> -->
<!--<script lang="scss">
p{ color: blue; }
</script> -->
<scrit>blah</scrit>
<script>top level script</script>
`
var abc = parse5.parseFragment(src)
const fs = require('fs')
const path = require('path')
var cache: any = []
fs.writeFileSync('temp.json', JSON.stringify(abc, replacer, 2))

function replacer(key: any, value: any) {
  if (typeof value === 'object' && value !== null) {
      if (cache.indexOf(value) !== -1) {
          // Circular reference found, discard key
          return;
      }
      // Store value in our collection
      cache.push(value);
  }
  return value;
}