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Question 80/110
A developer at Universal Containers is creating their new landing pagebased on HTML, CSS, and JavaScript.
The website includes multiple external resources that are loaded when the page is opened.
To ensure that visitors have a good experience, a script named personalizeWebsiteContent needs to be executed when the webpage isloaded and there is no need to wait for the resources to be available.
Which statement should be used to call personalizeWebsiteContent based on the above business requirement?
The website includes multiple external resources that are loaded when the page is opened.
To ensure that visitors have a good experience, a script named personalizeWebsiteContent needs to be executed when the webpage isloaded and there is no need to wait for the resources to be available.
Which statement should be used to call personalizeWebsiteContent based on the above business requirement?
Correct Answer: B
- Question List (110q)
- 3 commentQuestion 1: Given the HTML below: (Exhibit) Which statement adds the pri...
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Recent Comments (The most recent comments are at the top.)
La respuesta correcta es:
A. `window.addEventListener('DOMContentLoaded', personalizeWebsiteContent);`
Aquí se explica por qué:
* `DOMContentLoaded` es un evento que se dispara cuando el contenido del documento HTML ha sido cargado y parseado, pero no necesariamente cuando todos los recursos externos (como imágenes, estilos, etc.) han sido cargados.
* Al agregar un evento listener a `DOMContentLoaded`, se asegura que el script `personalizeWebsiteContent` se ejecute tan pronto como el contenido del documento esté disponible, sin tener que esperar a que todos los recursos externos estén cargados.
Las otras opciones no son correctas porque:
* B. `load` es un evento que se dispara cuando todos los recursos externos (incluyendo imágenes, estilos, etc.) han sido cargados. Si se utiliza este evento, el script `personalizeWebsiteContent` se ejecutará solo después de que todos los recursos externos estén cargados, lo que puede retrasar la experiencia del usuario.
* C. `onDOMCContentLoaded` no es un evento válido en JavaScript.
* D. `onload` es un evento que se dispara cuando todos los recursos externos han sido cargados, similar al evento `load`. Si se utiliza este evento, el script `personalizeWebsiteContent` se ejecutará solo después de que todos los recursos externos estén cargados, lo que puede retrasar la experiencia del usuario.
Es importante destacar que el evento `DOMContentLoaded` es el más adecuado para este caso, ya que permite que el script `personalizeWebsiteContent` se ejecute tan pronto como el contenido del documento esté disponible, sin tener que esperar a que todos los recursos externos estén cargados....