HTMLIFrameElement.setVisible() - Mozilla

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非标
此特征是非标准的，且不在标准轨道中。不要在面向 Web 的生产站点中使用它：它不适用于每个用户。实现之间可能存在大的不兼容性，且行为将来可能改变。

setVisible() 方法在 HTMLIFrameElement is used to change the visibility state of the browser <iframe> .

The visible state of a browser <iframe> has nothing to do with its actual visibility (which is handled through CSS). The visible state is used to define the level of resources required by the browser <iframe> . If the visible state is set to true , it means that the browser <iframe> should have high priority over the resources needed to render and handle its content. On the contrary, if its visible state is set to false , it has low priority over the resources it needs.

As an example, if the content of a browser <iframe> 使用 window.requestAnimationFrame method and if the visible state is set to true , window.requestAnimationFrame will be called as often as necessary. However, if the visible state is set to false , window.requestAnimationFrame will be called only when there are free resources to do it.

句法

instanceOfHTMLIframeElement.setVisible(visible);

Void.

参数

visible: A 布尔 that indicates if the browser <iframe> visible state is true or false .

范例

var browser = document.querySelector('iframe');
browser.setVisible(true);

规范

Not part of any specification.

浏览器兼容性

Supported since Firefox 47, in chrome code only.

Unlikely ever to be supported in other browsers.

另请参阅

Using the Browser API

元数据

最后修改： Apr 30, 2019

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