The command line interpreter gets access to the tabbrowser object, through the gBrowser global, and that enables you to control the browser through the command line. This means you can control the browser: opening, closing tabs and windows and changing the content that they host, and modify the browser’s UI by creating, changing and removing XUL elements. If your code does not have access to the main window because it is run in a sidebar or dialog, you first need to get access to the browser window you need before you can use gBrowser. You can confirm this by evaluating window: If you need to do something with gBrowserright after the window is opened, listenfor the loadevent and use gBrowserin the event listener. If the result of a command is an object, you can click on the object to see its details.īut while the Web Console executes code in the scope of the content window it’s attached to, the browser console executes code in the scope of the chrome window of the browser. Like the Web Console, the command line interpreter enables you to evaluate JavaScript expressions in real time:Īlso like the Web Console’s command line interpreter, this command line supports autocomplete, history, and various keyboard shortcuts and helper commands. To enable it set the preference to true in about:config, or set the “Enable chrome debugging” option in the developer tool settings. The Browser Console command line is disabled by default. Below is an example of how to access it, which adds a message to the Browser Console. The simple fix here is to use gBrowser.addEventListener ('load', myFunc, true) as described here and works in Firefox 2 as well. To use the console API from a traditional or bootstrapped add-on, get it from the Console module. The Browser Console displays messages logged by all Firefox add-ons. ![]() Input/output messages commands send to the browser via the command line, and the result of executing them Warnings and errors (including JavaScript, CSS, security warnings and errors, and messages explicitly logged by JavaScript code using the Console API The Browser console logs the same sorts of messages as the Web Console: BrowserWindow. The following image shows the browser console focused on the same page as above after clicking on the Show Content Messages checkbox. JavaScript and Node.js code examples Tabnine BrowserWindow.addEventListener How to use addEventListener function in BrowserWindow Best JavaScript code snippets using electron. the messages from scripts in all the opened pages) by setting or clearing the checkbox labeled Show Content Messages. Most of the window is occupied by a pane that display messagesĪt the top, a toolbar enables you to filter the messages that appear.Īt the bottom, a command line interpreter enables you to evaluate JavaScript expressions.īeginning with Firefox 68, the Browser Console allows you to show or hide messages from the content process (i.e. It also shows you how to attach event listeners to injected elements and elements that were already in the webpage. When a page matching a certain host name is found it will inject into it. You can see that the Browser Console looks and behaves very much like the Web Console: ff-addon-template-BootstrapWatchHostEventListener - Uses event listener (DOMContentLoaded) to watch page loads in all tabs and windows with gBrowser. app / Contents / MacOS / firefox - bin - jsconsole Refactor code so all content/DOM access is grouped in a single object or file. links: PTS, VCS area: main in suites: wheezy size: 1,013,096 kB sloc: cpp: 3,984,020 ansic: 1,866,720 java: 219,720 python: 213,675. case 'AboutReaderButtonClicked-my-button': //Handle button click event break To remove your button from the toolbar, dispatch an AboutReaderRemoveButton event on the DOM window and specify your button's id in the event detail.
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