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What is ReactJS and How to create components in ReactJS - Tutorial #1 in Hindi / Urdu Tutorial Video Lecture | Learn React JS: Fundamentals for Front-End Developers (in Hindi) - Front-End Programming
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| 1. ReactJS क्या है? |  |
Ans. ReactJS एक JavaScript library है जिसका उपयोग User Interfaces (UIs) बनाने के लिए किया जाता है। यह Facebook द्वारा विकसित किया गया है और वेब या मोबाइल ऐप्स के लिए उपयोग होता है।
| 2. ReactJS में components कैसे बनाएं? | |
Ans. ReactJS में components बनाने के लिए निम्नलिखित कदमों का पालन करें:
1. एक नया JavaScript file (.js) बनाएं और उसमे React component का कोड लिखें।
2. React की "Component" class को extend करें और "render()" फ़ंक्शन को override करें।
3. JSX (JavaScript XML) का उपयोग करके UI कोड लिखें।
4. Component को export करें ताकि उसे अन्य फ़ाइलों में इम्पोर्ट किया जा सके।
| 3. ReactJS में Virtual DOM क्या है और इसका क्या महत्व है? | |
Ans. Virtual DOM (Document Object Model) ReactJS की एक महत्वपूर्ण विशेषता है। यह एक अद्यतन योग्य DOM की प्रतिष्ठा रखता है जो UI परिवर्तनों को ट्रैक करता है और स्क्रीन पर परिवर्तनों को दिखाने के लिए उपयोग किया जाता है। इसका महत्व यह है कि जब कोई परिवर्तन होता है, तो ReactJS सिर्फ उसे अद्यतित करने की आवश्यकता होती है और फिर वह सिर्फ उस भाग को अद्यतित करता है जिसे परिवर्तन किया गया है। इससे performance में सुधार होता है और UI अद्यतित होने के लिए कम समय लगता है।
| 4. ReactJS क्या फ्रंट-एंड प्रोग्रामिंग के लिए बेहतर है? | |
Ans. ReactJS फ्रंट-एंड प्रोग्रामिंग के लिए बेहतर है क्योंकि इसमें Virtual DOM का उपयोग होता है जो UI परिवर्तनों को ट्रैक करता है और स्क्रीन पर परिवर्तनों को दिखाने के लिए उपयोग किया जाता है। इससे performance में सुधार होता है और UI अद्यतित होने के लिए कम समय लगता है। इसके साथ ही, ReactJS में components को अलग-अलग modules में बनाया जा सकता है और इनका पुनःउपयोग किया जा सकता है, जो पुनर्योजना को सरल और आसान बनाता है।
| 5. ReactJS क्या हिंदी/उर्दू में उपलब्ध है? | |
Ans. हां, ReactJS की documentation और tutorials हिंदी और उर्दू भाषा में उपलब्ध हैं। यहां आप इन भाषाओं में ReactJS से संबंधित सामग्री, वीडियो ट्यूटोरियल्स, और अन्य संसाधनों को आसानी से ढूंढ सकते हैं।
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