Providing both the catch method and passing a rejection handler to the then method allows for flexibility and backward compatibility with older JavaScript codebases. Originally, promises in JavaScript only had the then method to handle both fulfillment and rejection. However, the catch method was later introduced as a more convenient and expressive way to handle only the rejection case. It helps make the code cleaner and easier to understand, especially when dealing with asynchronous operations and error handling. However, since older codebases might not have been updated to use the catch method, providing the option to handle rejection within the then method ensures compatibility with older projects. Additionally, some developers may prefer the explicitness of passing both fulfillment and rejection handlers to then for clarity. In summary, having both options allows developers to choose the approach that best fits their coding style and the requirements of their project, while still supporting older code that may rely solely on then for error handling.
الصراحه انا اول درس في حياتي كلها مفهمش الشرح ده وحاسس انو صعب وفي نفس الوقت مش هستغدمو بس فهمت البروميس يعني ممكن اقول انها زي الاف حصل او محصلش بختصار صح كده
ارجع لأول فديو الي بيتكلم عن التزامن sync وعدم التزامن async لو خدنا مثال زي مكتب البريد لو خدنا مبدأ التزامن لازم ساعي البريد يبعت البريد بيت بيت أما لو خدنا مبدأ عدم التزامن ممكن المكتب يبعت الرسائل لاكتر من بيت في نفس الوقت
Providing both the catch method and passing a rejection handler to the then method allows for flexibility and backward compatibility with older JavaScript codebases.
Originally, promises in JavaScript only had the then method to handle both fulfillment and rejection. However, the catch method was later introduced as a more convenient and expressive way to handle only the rejection case. It helps make the code cleaner and easier to understand, especially when dealing with asynchronous operations and error handling.
However, since older codebases might not have been updated to use the catch method, providing the option to handle rejection within the then method ensures compatibility with older projects. Additionally, some developers may prefer the explicitness of passing both fulfillment and rejection handlers to then for clarity.
In summary, having both options allows developers to choose the approach that best fits their coding style and the requirements of their project, while still supporting older code that may rely solely on then for error handling.
جزاك الله كل خير
جزاك الله خير درس مميز
شكرا أستاذ
شكرا جزيل الشكر اخي
مشكووور حبيبي ماقصرت
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thankss
thanks
6:05
عشان متتعبش نفسك روح ابحث عن الصوره.. ايه دا المفروض انا اوريهالك عشان متتعبش نفسك :D
❤️💙
الصراحه انا اول درس في حياتي كلها مفهمش الشرح ده وحاسس انو صعب وفي نفس الوقت مش هستغدمو بس فهمت البروميس يعني ممكن اقول انها زي الاف حصل او محصلش بختصار صح كده
انا مش فاهم ايه فايدة الpromise
ارجع لأول فديو الي بيتكلم عن التزامن sync وعدم التزامن async
لو خدنا مثال زي مكتب البريد لو خدنا مبدأ التزامن لازم ساعي البريد يبعت البريد بيت بيت أما لو خدنا مبدأ عدم التزامن ممكن المكتب يبعت الرسائل لاكتر من بيت في نفس الوقت
❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤