March 2025
Intermediate to advanced
352 pages
9h 37m
Spanish
Content preview from Web Scraping con Python, 3.ª edición
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Capítulo 14. Raspado de JavaScript
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Los lenguajes de scripting del lado del cliente son lenguajes que se ejecutan en el propio navegador, en lugar de en un servidor web. El éxito de un lenguaje del lado del cliente depende de la capacidad de tu navegador para interpretar y ejecutar el lenguaje correctamente.
Mientras que hay cientos de lenguajes de programación del lado del servidor, sólo hay un lenguaje de programación del lado del cliente. Esto se debe a la dificultad de conseguir que todos los fabricantes de navegadores se pongan de acuerdo en un estándar. Esto es bueno en lo que respecta al web scraping: cuantos menos lenguajes haya que manejar, mejor.
Otros lenguajes de programación del lado del cliente
Algunos lectores pueden discrepar con la frase "Sólo existe un lenguaje de programación del lado del cliente". Técnicamente, existen lenguajes como ActionScript y VBScript. Sin embargo, ya no están soportados y, en el caso de VBScript, sólo fue soportado por un único navegador. Por esta razón, se ven muy poco.
Si quieres ser pedante al respecto, ¡absolutamente cualquiera puede crear un nuevo lenguaje de programación del lado del cliente! ¡Es probable que haya muchos por ahí! El único problema es conseguir un apoyo generalizado por parte de los navegadores para que ese lenguaje sea eficaz y pueda ser utilizado por otros.
Algunos también han argumentado que CSS ...
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