hn-criteria-filter.js

var criteria = 'remote react';
var comments = document.querySelectorAll('.comment-tree .athing');

[].slice.call(comments).forEach((e) => {
    var terms = criteria.split(' ');
    var matches = terms.every(t=>(e.innerText.match(new RegExp(t, 'gi')) || []).length)
    if(!matches){
        e.style.display = 'none'
    }
})