Add-ons

sessions.removeWindowValue()

Removes a value previously stored by a call to sessions.setWindowValue.

This is an asynchronous function that returns a Promise.

Syntax

var removing = browser.sessions.removeWindowValue(
  windowId,    // integer
  key          // string
)

Parameters

windowId
integer. ID of the window whose data you are trying to remove.
key
string. Key identifying the particular value to remove. This needs to match the key previously given in sessions.setWindowValue.

Return value

A Promise that will be resolved no arguments if the item was successfully removed. If the call failed (for example, because the window ID could not be found) then the promise will be rejected with an error message.

Browser compatibility

ChromeEdgeFirefoxFirefox for AndroidOpera
Basic support No No57 No No

Examples

This code adds two context menu items: one stores a value associated with the current window, the other one removes it:

async function setOnActiveWindow() {
  let currentWindow = await browser.windows.getLastFocused();
  await browser.sessions.setWindowValue(currentWindow.id, "my-key", "my-value");
}

async function removeFromActiveWindow() {
  let currentWindow = await browser.windows.getLastFocused();
  await browser.sessions.removeWindowValue(currentWindow.id, "my-key");
}

browser.menus.create({
  id: "add-my-item",
  title: "add item",
  contexts: ["all"]
});

browser.menus.create({
  id: "remove-my-item",
  title: "remove item",
  contexts: ["all"]
});

browser.menus.onClicked.addListener((info) => {
  if (info.menuItemId === "add-my-item") {
    setOnActiveWindow();
  } else {
    removeFromActiveWindow();
  }
});

Document Tags and Contributors

 Contributors to this page: wbamberg
 Last updated by: wbamberg,