Bug: buildNavJs forEach error when parent.clientWidth == 0

### Disclaimer - [x] I am aware that this issue will be closed or converted to a discussion if the requested code is missing or invalid. ### Description Pagy v43.5.1 Came across an issue in `nav.render()` in `buildNavJs` with turbolinks. We're using a Stimulus controller to fire Pagy.init() on connect(). On initial page load, it all works correctly. When I then click on any pagination link and it turbolinks navigates, I get a js error. `series[index].forEach()` throws as `index == -1`. This seems to be caused by `parent.clientWidth == 0` while turbolinks is re-rendering. `nav.render()` is being called twice on initial page load, and twice on turbolinks page load. In the first `nav.render()`, called from buildNavJs, `parent.clientWidth == 1400`. As expected. In the second call from ResizeObserver, `parent.clientWidth == 0`. Throws. On initial page load, both calls correctly return `1400`. Just the first ResizeObserver call after navigation throws. On browser resize it works fine too. I was able to get it working using 3 methods: a) by changing `<` to `<=` to fallback to the smallest breakpoint: ```diff - const index = widths.findIndex((w) => w < parent.clientWidth); + const index = widths.findIndex((w) => w <= parent.clientWidth); ``` b) keep using `<` and default to the smallest breakpoint when index is < 0: ```diff - const index = widths.findIndex((w) => w < parent.clientWidth); + let index = widths.findIndex((w) => w < parent.clientWidth); + if (index === -1) { index = widths.length - 1; } ``` c) or simply return early if clientWidth is 0 and let the next `nav.render()` handle it: ```diff + if (parent.clientWidth === 0) return; ``` **Our setup** /config/initializers/pagy.rb ```ruby Pagy::OPTIONS[:steps] = { 0 => 5, 576 => 10 } ``` /app/javascript/controllers/pagy_init_controller.js ```javascript import { Controller } from "@hotwired/stimulus"; import Pagy from "pagy.mjs" export default class extends Controller { connect() { if (!Pagy) return; Pagy.init(this.element); } } ``` /app/views/nav/_pagy.html.slim ``` .d-flex.justify-content-center data-controller="pagy-init" == pagy.series_nav_js if pagy.pages > 1 ```