--- title: 'Document: readystatechange event' slug: Web/API/Document/readystatechange_event translation_of: Web/API/Document/readystatechange_event ---

readystatechange 이벤트는 현재 페이지의 {{domxref("Document.readyState", "readyState")}} 속성값이 변할 때 발생한다.

Bubbles	No
Cancelable	No
Interface	{{domxref("Event")}}
Event handler property	`onreadystatechange`

Examples

Live example

HTML

<div class="controls">
  <button id="reload" type="button">Reload</button>
</div>

<div class="event-log">
  <label>Event log:</label>
  <textarea readonly class="event-log-contents" rows="8" cols="30"></textarea>
</div>

CSS

body {
  display: grid;
  grid-template-areas: "control  log";
}

.controls {
  grid-area: control;
  display: flex;
  align-items: center;
  justify-content: center;
}

.event-log {
  grid-area: log;
}

.event-log-contents {
  resize: none;
}

label, button {
  display: block;
}

#reload {
  height: 2rem;
}

JS

const log = document.querySelector('.event-log-contents');
const reload = document.querySelector('#reload');

reload.addEventListener('click', () => {
  log.textContent ='';
  window.setTimeout(() => {
      window.location.reload(true);
  }, 200);
});

window.addEventListener('load', (event) => {
    log.textContent = log.textContent + 'load\n';
});

document.addEventListener('readystatechange', (event) => {
    log.textContent = log.textContent + `readystate: ${document.readyState}\n`;
});

document.addEventListener('DOMContentLoaded', (event) => {
    log.textContent = log.textContent + `DOMContentLoaded\n`;
});

Result

Specifications

Specification	Status	Comment
{{SpecName("HTML WHATWG", "indices.html#event-readystatechange", "readystatechange")}}	{{Spec2("HTML WHATWG")}}

Examples

Live example

HTML

CSS

JS

Result

Specifications

Browser compatibility

See also