In this user guide, we are going to identify some of the possible causes that can cause a JavaScript error in the object window, and then point out some possible solutions to this problem. The widget is supported by all browsers. It represents a browser window. All JavaScript global objects, functions, and variables automatically become members of the widget. Global variables are properties of the widget. Global functions are widget methods.
The widget is supported by all browsers. It represents a browser window. All JavaScript global objects, functions, and variables automatically become members of the widget. Global variables are properties of the widget. Global functions are widget methods.
The error event is raised for the Window object if the resource cannot be loaded or cannot be used, for example B. when the script has a runtime error.
The event object is a UIEvent instance if it was created from a user interface element, or an Event instance otherwise.
HTML
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JS
const log = document.querySelector ('. event log content');window.addEventListener ('error', (event) => { log.textContent = log.textContent `$ {event.type}: $ {event.message} n`; console.log event});const scriptError = document.querySelector ('# script error');scriptError.addEventListener ('click', () => { const badCode = 'const s;'; eval (badCode);});
Result
- This event in the target
element:error
event
What If An Error Occurs?
Obviously, if you visit a website that displays an error, it is not necessary to fix it.it is possible. However, if you are feeling generous, you can contact the webmaster and let them know. You can still view the page (turning off automatic error messages makes it easy), but what the script is supposed to do won’t work. This may or may not affect the functionality of the page.
If you’re a webmaster, you should understand what the error message says and fix the problem. Read on ….
Widget Methods
| method | Description |
|---|---|
| alert () | Displays a warning window with a message and an OK button |
| atob () | Decode base 64 encoded string |
| blur () | Remove focus from current window |
| btoa () | Encode string to Base-64 |
| clearInterval () | Remove timer defined with setInterval () |
| clearTimeout () | Remove timer defined with setTimeout () |
| close () | Close current window |
| confirm () | Displays a dialog box withmessage and OK and Cancel buttons |
| focus () | Set focus to current window |
| getComputedStyle () | Retrieves the currently computed CSS styles that are applied to the element |
| getSelection () | Returns a selection object representing the range of text selected by the user. |
| matchMedia () | Returns a MediaQueryList object representing the specified CSS media query string |
| moveBy () | Moves the window relative to its current position |
| moveTo () | Move window to specified position |
| open () | Opens a new browser window |
| print () | Print the contents of the current window |
| invite () | Displays a dialog box asking the visitor for input |
| requestAnimationFrame () | asks the browser to first call a function to update the animation next repainting |
| resizeBy () | Resize the window to specified pixels |
| resizeTo () | Resize window n specified width and height |
| scroll () | Exceeded. This method has been superseded by the scrollTo () method. |
| scrollBy () | Scrolls the document by the specified number of pixels |
| scrollTo () | Scroll the document to the specified coordinates |
| setInterval () | Calls a function or evaluates an expression at specified intervals (in milliseconds). |
| setTimeout () | Calls a function or evaluates an expression after a specified number of milliseconds |
| stop () | Stop loading window |
What is a JavaScript error message?
Most internet users have encountered an annoying JavaScript error at some point. This happens when the script on the web page contains an error or does not work correctly. What exactly happens depends on the browser and the type of error. However, in most cases, some sort of error notification will be displayed.
How do I find JavaScript errors?
Press Command Option J (Mac) or Ctrl Shift J (Windows, Linux, Chrome OS) to go directly to the Chrome DevTools console window. Or go to More Tools> Developer Tools in the Chrome menu and go to the Console tab. The error console will open. If you don’t see any errors, please reload the page.
What method can be used with a window object in JavaScript?
| Method | Description |
|---|---|
| moveTo () | Move the window to the specified position |
| open () | Opens a new browser window |
| print () | Print the contents of the current window |
| prompt () | Displays a dialog asking the visitor for input. |
