Question

Technologies:

javascript

html

Tolerim

a month ago

How can the iframe src value be automatically changed when the media query changes?

To ensure that the iframe element loads the desired HTML page when the media query matches max-width:1224px, we need to update the src attribute of the iframe dynamically. Currently, the src attribute is being set on page load, which only occurs once unless the page is refreshed. To achieve the desired behavior, we need to create a function that checks for changes to the media query and updates the src attribute accordingly. Here's an example implementation:

document.addEventListener("DOMContentLoaded", function () {
  let query = window.matchMedia("(max-width:1224px)");
  let iframe = document.querySelector("main>iframe");

  function handleMatchMedia() {
    if (query.matches) {
      iframe.setAttribute("src", "/HTML/card.html");
    } else {
      iframe.setAttribute("src", "/HTML/about.html");
    }
  }

  handleMatchMedia(); // Call the function to set the initial src attribute

  // Add a listener for changes to the media query
  query.addListener(handleMatchMedia);
});

This code defines a new function called handleMatchMedia() that sets the src attribute based on whether the media query matches or not. We also call this function once immediately after the page loads to set the initial state. Finally, we add a addListener() method to the media query object that watches for changes to the media query and calls handleMatchMedia() when that happens.

Answers(2)

Tolerim

a month ago

To make the content switch as soon as the media size changes, you can wrap the code inside a function and add an event listener to the query object which will fire when its state changes. Here's an example code snippet that should do the trick:

function switchContent() {
  let query = window.matchMedia("(max-width:1224px)");
  let iframe = document.querySelector("main>iframe");

  function loadContent() {
    if (query.matches) {
      iframe.setAttribute("src", "/HTML/card.html");
    } else {
      iframe.setAttribute("src", "/HTML/about.html");
    }
  }

  loadContent();
  query.addEventListener("change", loadContent);
}

document.addEventListener("DOMContentLoaded", switchContent);

In this example, we have defined a named function switchContent that contains the original code but wrapped in a new function called loadContent. We then call loadContent once at the start to set the initial state of the iframe. Finally, we add an event listener to the query object to listen for changes and call loadContent again whenever the state changes.

Accepted Answer

Thank you for sharing the code snippet. It seems like you are trying to update the src attribute of an iframe element based on the width of the viewport. The code you provided is a good starting point for achieving this behavior. The code creates a new function called handleMatchMedia() that sets the src attribute based on whether the media query matches or not. This function is called once immediately after the page loads to set the initial state. Finally, it adds a addListener() method to the media query object that watches for changes to the media query and calls handleMatchMedia() when that happens. If you have any questions or need further assistance, please let me know.