[Translation] Handling Events by niyabits · Pull Request #27 · reactjs/hi.react.dev

@niyabits

  • 1. First Section
  • 2. Try it on CodePen
  • 3. Passing Arguments to Event Handlers {#passing-arguments-to-event-handlers}

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@niyabits niyabits changed the title [Translation] Line 11 - Initial Commit [Translation] Handling Events

Mar 26, 2019

@arshadkazmi42

@arshadkazmi42

@yashguptaz Just want to check in, if you are waiting for review for this. I would suggest have at least 1 section translated for review.

@niyabits

I will proceed with this tomorrow, I'm busy with some client work right now.

@niyabits

@niyabits

@arshadkazmi42

@yashguptaz Just ping me whenever you want me to start the review

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arshadkazmi42

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Good start.
I have added a couple of comments.
We can close on the review of this section, then you can proceed with further translations

@arshadkazmi42

@niyabits

@arshadkazmi42

@yashguptaz There's a couple of things missed, once you are done with those, you can continue working on rest of the page translation

@arshadkazmi42

@arshadkazmi42

@arshadkazmi42

@yashguptaz Any updates on this?

@arshadkazmi42

@niyabits

No, I'm busy these days that's why I am not able to do any further translations.

@niyabits

@niyabits

@arshadkazmi42 Can you review please?
I am free now for a few days, let's get this done.
Sorry for inactivity.

@arshadkazmi42

@arshadkazmi42

@saranshkataria

@yashguptaz any updates on this?

@niyabits

@arshadkazmi42

@saranshkataria

@yashguptaz let us know if you will be able to spare time to complete this, else we will be closing this PR out

@niyabits

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@saranshkataria

arshadkazmi42

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Great work. Thank you for working on all those feedbacks 👍
@saranshkataria you can start with the 2nd phase of the review.

@niyabits

@niyabits

@saranshkataria are you done with reviewing? Please do it fast, I have to manage it all with my school and coaching.

saranshkataria

saranshkataria

* React events are named using camelCase, rather than lowercase.
* With JSX you pass a function as the event handler, rather than a string.
* React के इवेंट्स का नाम lowercase कि जगह camelCase में रक्खा जाता है ।
* JSX का उपयोग करते समय, आप एक function को string की जगह इवेंट हैंडलर में पास करते हैं ।

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changes the context of the sentence, rewrite it in a better way perhaps?

saranshkataria

saranshkataria

saranshkataria

@saranshkataria

@saranshkataria

added comments till line 94

@niyabits

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saranshkataria

```

Here, `e` is a synthetic event. React defines these synthetic events according to the [W3C spec](https://www.w3.org/TR/DOM-Level-3-Events/), so you don't need to worry about cross-browser compatibility. See the [`SyntheticEvent`](/docs/events.html) reference guide to learn more.
यहाँ पर `e` एक सिंथेटिक इवेंट है । React इन सिंथेटिक इवेंट्स को [W3C spec](https://www.w3.org/TR/DOM-Level-3-Events/) के हिसाब से परिभाषित करता है, ताकी आपको cross-browser compatibility कि चिंता नही करनी पड़े । और सीखने के लिए [`SyntheticEvent`](/docs/events.html) की रिफरेन्स गाइड को देखें ।

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नही करनी पड़े -> na karni

saranshkataria

जब आप [ES6 class](https://developer.mozilla.org/en/docs/Web/JavaScript/Reference/Classes) से एक कौम्पोनॅन्ट डिफाइन करते हैं, तो इसके लिए इवेंट हैंडलर को उस क्लास का मेथड होना एक आम पैटर्न है । उद्धरण के तौर पर `Toggle` कॉम्पोनेन्ट एक बटन को रेंडर करता है, ये बटन यूज़र को "ON" और "OFF" states को बदलने देता है:

```js{6,7,10-14,18}
class Toggle extends React.Component {

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translate comments as well?

saranshkataria

[**इससे CodePen पर इस्तेमाल करें**](https://codepen.io/gaearon/pen/xEmzGg?editors=0010)

You have to be careful about the meaning of `this` in JSX callbacks. In JavaScript, class methods are not [bound](https://developer.mozilla.org/en/docs/Web/JavaScript/Reference/Global_objects/Function/bind) by default. If you forget to bind `this.handleClick` and pass it to `onClick`, `this` will be `undefined` when the function is actually called.
JSX callbacks आपको `this` के मतलब के साथ ध्यानपूर्वक रहना चाहिए । जावास्क्रिप्ट में class मेथड्स पहले से [bound](https://developer.mozilla.org/en/docs/Web/JavaScript/Reference/Global_objects/Function/bind) नहीं होते । अगर आप `this.handleClick` को bind करना भूल जाते हैं और उसे `onClick` पर पास कर देते हैं तो, `this` function के बुलाने पर `undefined` हो जाता है ।

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JSX callbacks आपको this के मतलब के साथ ध्यानपूर्वक रहना चाहिए । -> incorrect sentence structure

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बुलाने पर undefined हो जाता है । -> could be worded better?

saranshkataria

JSX callbacks आपको `this` के मतलब के साथ ध्यानपूर्वक रहना चाहिए । जावास्क्रिप्ट में class मेथड्स पहले से [bound](https://developer.mozilla.org/en/docs/Web/JavaScript/Reference/Global_objects/Function/bind) नहीं होते । अगर आप `this.handleClick` को bind करना भूल जाते हैं और उसे `onClick` पर पास कर देते हैं तो, `this` function के बुलाने पर `undefined` हो जाता है ।

This is not React-specific behavior; it is a part of [how functions work in JavaScript](https://www.smashingmagazine.com/2014/01/understanding-javascript-function-prototype-bind/). Generally, if you refer to a method without `()` after it, such as `onClick={this.handleClick}`, you should bind that method.
यह बर्ताव React कि वजेह से नहीं होता बल्कि यह [जावास्क्रिप्ट के functions के काम करने के तरीके का एक भाग है ](https://www.smashingmagazine.com/2014/01/understanding-javascript-function-prototype-bind/). आम तौर पर अगर आप किसी मेथड को बिना `()` को उसके बाद में लगाये refer करते है, जैसे, `onClick={this.handleClick}` तो आपको वो मेथड bind करना चाहिए ।

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कि वजेह -> spelling of both words is incorrect

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आम तौर पर अगर आप किसी मेथड को बिना () को उसके बाद में लगाये refer करते है, जैसे, onClick={this.handleClick} तो आपको वो मेथड bind करना चाहिए । revisit sentence structure

saranshkataria

अगर `bind` का बार बार कॉल करना आपको परेशान करता है, तो इससे बचने के आपके पास दो तरीके हैं । अगर आप experimental [public class फ़ील्ड्स सिंटेक्स](https://babeljs.io/docs/plugins/transform-class-properties/) इस्तेमाल कर रहे हैं, तो आप class फ़ील्ड्स का इस्तेमाल करके callbacks को सही से bind कर सकते हैं:

```js{2-6}
class LoggingButton extends React.Component {

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translate comments?

saranshkataria

```

This syntax is enabled by default in [Create React App](https://github.com/facebookincubator/create-react-app).
यह सिंटैक्स [Create React App](https://github.com/facebookincubator/create-react-app) में डिफ़ॉल्ट रूप में पाया जाता है।

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में डिफ़ॉल्ट रूप में पाया जाता है। -> better wording?

saranshkataria

अगर आप class फील्ड सिंटैक्स नहीं इस्तेमाल कर रहें हैं तो आप callback में [एरो फंक्शन](https://developer.mozilla.org/en/docs/Web/JavaScript/Reference/Functions/Arrow_functions) का इस्तेमाल कर सकते हैं।

```js{7-9}
class LoggingButton extends React.Component {

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comments again

@saranshkataria

added comments till {#passing-arguments-to-event-handlers}

@saranshkataria

@saranshkataria

@arshadkazmi42

Closing due to inactivity