Toggles Reader Mode for the given tab.
This function toggles Reader Mode for the given tab. It takes a tab ID as a parameter: if this is omitted, the currently active tab is toggled.
This is an asynchronous function that returns a
Promise
.
Reader Mode, also known as Reader View, is a browser feature that makes it easier for the user to focus on an article by:
Reader Mode is useful specifically for articles: meaning, pages that have a body of text content as their main feature. Pages that don't have an identifiable article are not eligible for display in Reader Mode. To find out whether a page is an article, check the
isArticle
property of
tabs.Tab
.
To find out whether a tab is already in Reader Mode, check the
isInReaderMode
property of
tabs.Tab
. To track tabs changing into or out of Reader Mode, you'll need to keep track of the current state of all tabs, and check when
isInReaderMode
changes:
function handleUpdated(tabId, changeInfo, tabInfo) {
if (changeInfo.status === "complete") {
console.log(`Tab ${tabId} reader mode: ${tabInfo.isInReaderMode}`);
}
}
browser.tabs.onUpdated.addListener(handleUpdated);
var toggling = browser.tabs.toggleReaderMode(
tabId // optional integer
)
tabId
可选
integer
. The ID of the tab to display in Reader Mode. Defaults to the selected tab of the current window.
A
Promise
that will be fulfilled with no arguments when the tab has been updated. If any error occurs (for example, because the page was not an article), the promise will be rejected with an error message.
This code switches every new page into Reader Mode, if that page is eligible for it:
function switchToReaderMode(tabId, changeInfo, tabInfo) {
if (changeInfo.isArticle) {
browser.tabs.toggleReaderMode(tabId);
}
}
browser.tabs.onUpdated.addListener(switchToReaderMode);
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最后修改： , 由 MDN 贡献者