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Document:readystatechange 事件
Baseline
Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since 2015年7月.
当文档的 readyState 属性发生改变时,会触发 readystatechange 事件。
| 是否冒泡 | 否 |
|---|---|
| 是否可取消 | 否 |
| 接口 | Event |
| Event handler 属性 | onreadystatechange |
示例
实时演示
HTML
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>
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;
}
JavaScript
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`;
});
结果
[フレーム]
规范
| Specification |
|---|
| HTML # event-readystatechange |
浏览器兼容性
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