To change font in a Bootstrap styled button, you can add a custom CSS class that specifies the desired font. Here's an example in CSS:

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.custom-btn {
  font-family: Arial, sans-serif;
}

Then you can add the custom-btn class to your Bootstrap button like this:

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<button class="btn btn-primary custom-btn">Click me</button>

This will apply the custom-btn styles in addition to the default Bootstrap button styles. Feel free to change the font-family property to whichever font you prefer.

To make a button rounded, you can apply the border-radius property, setting it to a value equal to half of the button's width and height. Here's an example using CSS:

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button {
  border-radius: 50%;
}

This will make the button perfectly rounded. You can adjust the border-radius value to make the button more or less rounded.

If you want to make a button rounded using Bootstrap, you can use the .rounded class. Here's an example:

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<button class="btn btn-primary rounded">Click me</button>

This will give you a rounded button with a blue background. You can change the color and other styles by using Bootstrap classes or your own custom CSS.

Here is an example of how you can change the src attribute of an img element after clicking a button using addEventListener().

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<!-- HTML code -->
<img id="myImg" src="image1.jpg">
<button id="myButton">Change Image</button>

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// JavaScript code
const myImg = document.getElementById("myImg");
const myButton = document.getElementById("myButton");

myButton.addEventListener("click", function() {
  myImg.src = "image2.jpg";
});

In this example, we first grab the img element and the button element using document.getElementById(). We then add an event listener to the button using addEventListener(), specifying that when it is clicked, the src attribute of the img element should be changed to a new image file ("image2.jpg" in this case).

You can customize this code to suit your needs by replacing the image file names with yours.

To add an event listener to a button using JavaScript, you can use the addEventListener method. You will first need to select the button element using document.querySelector or document.getElementById. Once you have your button element, you can add the event listener like this:

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const button = document.querySelector('button');

button.addEventListener('click', function() {
  // code to be executed when button is clicked
});

In this example, the event listener is added to the button and will execute a function when the button is clicked. You can replace the function() {...} with any JavaScript code that you want to execute in response to the button click event. Here's a Mozilla Developer Network article for reference.

To create a box-shadow for a button in CSS, you can use the box-shadow property. Here's an example code snippet:

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button {
  box-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

This will create a box-shadow for the button element that has a horizontal offset of 2 pixels, a vertical offset of 2 pixels, a blur radius of 4 pixels, and a color of rgba(0, 0, 0, 0.5) (which is a semi-transparent black color). Feel free to adjust these values to achieve the desired look!

To keep a button selected after it is clicked, you can toggle a CSS class on the button using JavaScript. Here's an example code snippet in JavaScript that demonstrates how to achieve this:

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const button = document.querySelector('#myButton'); // select the button element
button.addEventListener('click', function() {
  button.classList.toggle('selected'); // toggle the 'selected' class on click
});

In the CSS, you can define the 'selected' class to change the appearance of the button to indicate it has been selected:

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.selected {
  background-color: blue;
  color: white;
  /* add any other styling you want for a selected button */
}

Here, the background color of the button will change to blue and the text will change to white once the button is clicked. You can customize the CSS class to your liking.

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const button = document.querySelector('button'); // replace 'button' with the selector of your specific button element
button.addEventListener('click', myFunction); // replace 'myFunction' with the name of the function you want to call
function myFunction() {
  // add the code you want to run when the button is clicked
}

Sure, here's an example of basic HTML code for a button:

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<button>Click me!</button>

You can also add attributes like id, class, and onclick to customize the button:

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<button id="myButton" class="btn" onclick="alert('Hello!')">Click me!</button>

Here's a link to the Mozilla Developer Network (MDN) documentation on HTML button elements for further information and examples: https://developer.mozilla.org/en-US/docs/Web/HTML/Element/button

To center a button, you can use CSS. One way to do it is by setting the button's display property to "block" and then setting its margin property to "auto".

Here's an example CSS code that centers a button with the class "my-button":

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.my-button {
  display: block;
  margin: auto;
}

In your HTML, you would add the class "my-button" to your button element like this:

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<button class="my-button">Click Me</button>

This approach will center the button horizontally within its parent element. If you also want to center it vertically, you'll need to use additional CSS.

React.js Code:

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import React, { useState } from 'react';

const ProductPage = () => {
  const [selectedSize, setSelectedSize] = useState('S');
  const [selectedPrice, setSelectedPrice] = useState(10);

  const handleSizeChange = (e) => {
    setSelectedSize(e.target.value);
    if (e.target.value === 'S') {
      setSelectedPrice(10);
    } else if (e.target.value === 'M') {
      setSelectedPrice(15);
    } else if (e.target.value === 'L') {
      setSelectedPrice(20);
    }
  }

  return (
    <div className="product-page">
      <div className="product-image-container">
        <img src="image1.jpg" alt="Product Image" />
        <img src="image2.jpg" alt="Product Image" />
      </div>
      <div className="product-details">
        <h1>Product Name</h1>
        <p>Price: ${selectedPrice}</p>
        <label htmlFor="size-select">Size:</label>
        <select id="size-select" value={selectedSize} onChange={handleSizeChange}>
          <option value="S">Small</option>
          <option value="M">Medium</option>
          <option value="L">Large</option>
        </select>
        <button>Add to Cart</button>
      </div>
    </div>
  );
};

export default ProductPage;

Explanation:

• We use useState hook to manage the selected size and price of the product.
• We listen to the changes in the size selection using the onChange event and update the selected size and price accordingly using the setSelectedSize and setSelectedPrice functions.
• We display the product image(s), product name, price, size selection dropdown, and an Add to Cart button.
• The price displayed changes depending on the selected size.
• The user can see more than one product image.

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button {
  border-radius: 10px;
}

This code adds rounded corners to all the edges of a button with a radius of 10 pixels. You can adjust the value of the radius to make it more or less pronounced.

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button {
  border-radius: 50%;
  display: block;
  margin: 0 auto;
}

Here is the possible solution using HTML and CSS:

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<button class="round-btn">Click me!</button>

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.round-btn {
  display: block;
  margin: 0 auto;
  border-radius: 50%;
}

This will make the button centered horizontally and round. You can adjust the size of the button using the padding or font-size CSS properties.