WaitFor.js

WaitFor.js is a JavaScript file that provides a convenient function for scraping data and automating tasks in a Chrome extension. The elementReady(selector, xpath, timeout) function allows you to wait for an element to be available on a web page before proceeding with your desired actions.

Function Parameters

The elementReady() function accepts the following parameters:

• selector: This parameter allows you to specify a CSS selector or XPath expression to identify the target element. You can use either a CSS selector or XPath by setting the xpath parameter accordingly.

• xpath: A boolean value indicating whether the provided selector is a CSS selector or an XPath expression. Pass true if the selector is an XPath expression; otherwise, pass false for a CSS selector.

• timeout: The timeout parameter is measured in milliseconds. You can specify the desired timeout value, for example, 1000ms for 1 second. If the function fails to find the element within the specified timeout, it will throw a timeout exception.

Usage

To use WaitFor.js in your Chrome extension, follow these steps:

1. Download the waitfor.js file from this repository.

2. Include the waitfor.js file in your Chrome extension project.

3. In your JavaScript code, call the elementReady() function with the appropriate parameters. For example:

elementReady('#myElement', false, 5000)
  .then(function(element) {
    // Element is available, perform desired actions here
    console.log('Element is ready:', element);
  })
  .catch(function(error) {
    // Handle timeout or other errors here
    console.error('Timeout error:', error);
  });

Examples

Here are a few examples to help you understand how to use the elementReady() function:

• Waiting for a CSS selector:

elementReady('.myClass', false, 2000)
.then(function(element) {
 // Element with CSS class 'myClass' is available
 // Perform actions on the element here
})
.catch(function(error) {
 // Handle timeout or other errors here
});

-Waiting for an XPath expression:

elementReady('//div[@id="myDiv"]', true, 3000)
.then(function(element) {
  // Element matching the XPath expression is available
  // Perform actions on the element here
})
.catch(function(error) {
  // Handle timeout or other errors here
});