💬 In plain words: Every Lightning Web Component (LWC) goes through the same life stages. It gets created, added to the page, drawn on the screen, and later removed. LWC gives you a lifecycle hook for each stage. constructor = born. connectedCallback = moved into the page. renderedCallback = painted on the screen. disconnectedCallback = removed from the page. Always put your code in the earliest hook that has what your code needs. Put code in the wrong hook and you get bugs that are hard to track down: values that show up as undefined , a browser tab that freezes, or listeners that pile up every time the component loads again. This post walks through each hook in the order it runs, shows what belongs in each one, and covers the mistakes that come up most in real projects and interviews.
Lightning Web Components