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Automating Web Interactions

Simulating Clicks on Elements

Clicking a Button Example

// In a real scenario, this script would be injected
// into an existing webpage. For demonstration, we'll
// add a button to the current document.
const button = document.createElement('button');
button.id = 'myButton';
button.textContent = 'Click Me!';
button.style.padding = '10px';
button.style.margin = '10px 0';
button.onclick = () => {
  console.log('Original button handler triggered!');
};
document.body.appendChild(button);

// Now, simulate a click on the button
const targetButton = document.getElementById('myButton');
if (targetButton) {
  targetButton.click(); // Programmatically click it
  console.log('Programmatic click executed.');
} else {
  console.log('Button not found.');
}

Inputting Text Programmatically

Filling an Input Field Example

// Create an input field for demonstration
const inputField = document.createElement('input');
inputField.type = 'text';
inputField.id = 'myInput';
inputField.placeholder = 'Type something...';
inputField.style.padding = '8px';
inputField.style.margin = '10px 0';
inputField.oninput = () => {
  console.log('Original input handler triggered!');
};
document.body.appendChild(inputField);

// Simulate typing "Hello Coddy!"
const targetInput = document.getElementById('myInput');
if (targetInput) {
  targetInput.value = 'Hello Coddy!';

  // Dispatch 'input' event
  const inputEvent = new Event('input', { bubbles: true });
  targetInput.dispatchEvent(inputEvent);

  // Dispatch 'change' event (often needed for form submissions)
  const changeEvent = new Event('change', { bubbles: true });
  targetInput.dispatchEvent(changeEvent);

  console.log('Text input filled and events dispatched.');
  console.log('Current value:', targetInput.value);
} else {
  console.log('Input field not found.');
}

Advanced Event Dispatching

Programmatic Mouse Down

// Create a div to interact with
const targetDiv = document.createElement('div');
targetDiv.id = 'targetDiv';
targetDiv.style.width = '150px';
targetDiv.style.height = '70px';
targetDiv.style.backgroundColor = 'lightblue';
targetDiv.style.border = '1px solid blue';
targetDiv.style.margin = '10px 0';
targetDiv.style.display = 'flex';
targetDiv.style.alignItems = 'center';
targetDiv.style.justifyContent = 'center';
targetDiv.textContent = 'Target Element';
targetDiv.onmousedown = () => {
  console.log('Original mousedown handler triggered!');
  targetDiv.style.backgroundColor = 'lightcoral';
};
document.body.appendChild(targetDiv);

// Dispatch a mousedown event
const mouseDownEvent = new MouseEvent('mousedown', {
  bubbles: true,
  cancelable: true,
  view: window,
  clientX: 50, // Example coordinates
  clientY: 25
});

const element = document.getElementById('targetDiv');
if (element) {
  element.dispatchEvent(mouseDownEvent);
  console.log('mousedown event dispatched on targetDiv.');
} else {
  console.log('Target div not found.');
}

Handling Dynamic Content

Quick Check: Simulating Input

Recap: Automating Interactions