🔵 کوییز #React_js 🟣 موضوع : طراحی Mobile‑First در React 🟢 سوال : برای lazy load کردن کامپوننتها در React برای صرفهجویی پهنای باند موبایل، چه روشی کاربردی است؟ گزینه 1: React.memo گزینه 2: import dynamic from 'next/dynamic' گزینه 3: React.lazy گزینه 4: useCallback 🔵 گزینه صحیح: 3 🟢 توضیح : React.lazy امکان تفکیک (code splitting) و لیزی لود کامپوننتها را فراهم میکند و به کاهش حجم اولیه کمک میکند.…

Channel
آموزش ویدیویی جاوا اسکریپت، Node.js ، React ، jQuery ، Vue و ...
@javascript7ir
On this record: Growth · Engagement · What this channel posts · Posts · Citations · Cite this entry
1,606subscribers
+2 since we began measuring on 6 August 2026
Risers and fallers across the register · movement among entries of 1,000–3,162.
Register entry
| Telegram ID | -1001894567579 |
|---|---|
| Type | Channel |
| Username | @javascript7ir |
| Created | Between 1 October 2022 and 30 September 2023— estimated from Telegram’s id allocation, not measured. How this range is calculated. |
| First recorded | 6 August 2026 |
| Last confirmed live | 12 August 2026 |
| Measurements held | 4 |
| Confirmed unchanged | 1 time, most recently 12 August 2026 |
| On Telegram | t.me/javascript7ir |
Growth
| Measured (UTC) | Subscribers | Change |
|---|---|---|
| 12 Aug 2026, 16:38 | 1,606 | +3 |
| 10 Aug 2026, 00:58 | 1,603 | -1 |
| 7 Aug 2026, 06:38 | 1,604 | no change |
| 6 Aug 2026, 21:32 | 1,604 | first reading |
Engagement
20 posts held, back to 18 July 2026 — the reader has not yet reached the start of this channel’s public history, so older posts may sit further back, unread. Read across 2 pagesof Telegram’s post history, 20 posts per page.
- ERR · 30 days
- 1.38%
- avg views ÷ 1,606 subscribers
- Avg views / post
- 22.1
- 20 posts measured
- Reaction rate
- —
- this channel exposes no reaction counts
- Posts in window
- 20
- of 20 held
ERR is average views per post over the last 30 days divided by subscribers, the definition TGStat uses, so this figure is comparable with the one you will see elsewhere. It falls structurally as a channel grows: a high ERR on a small channel and a low one on a large channel describe reach mathematics, not quality. We publish the figure and the sample it came from and pass no verdict on it.
ER is defined industry-wide as (forwards + reactions + comments) ÷ views— note the denominator is views, not subscribers. Telegram’s public web preview carries views and reactions but not forward or comment counts, so the reaction rate above is the reactions term only and is therefore a floor: the true ER for this channel is higher by an amount we have not measured and will not estimate.
| Window | Rolling 30 days · latest post in window 5 August 2026 |
|---|---|
| Posts held | 20 (18 July 2026 – 5 August 2026) |
| Views total | 442 |
| Reactions total | — |
| Forwards / comments | not exposed by the public surface — not measured, not estimated |
| Readings taken | 7 Aug 2026, 17:57 UTC |
Views are a single reading per post, taken at the time above. A post published in the last day or two is still accumulating views, which pulls the 30-day average down slightly. That is a property of the standard definition rather than a fault in it, so we keep the definition rather than “correcting” the number into something nobody can reproduce.
Precision. Telegram publishes view counts on its public widget in short form — 8.12K, 3.7M — so any reading at or above 1,000 reaches us rounded to three significant figures, and only counts below 1,000 are exact. Averages and rates derived from them are shown to the same precision rather than to the unit: a figure like 3,701,250 would assert digits nobody measured.
Reaction counts are published per emoji and rounded the same way, so a total below 1,000 is exact and a larger one is a sum that may carry a rounded component from each emoji above 1,000. Because it is a sum, it does not look rounded — read a large reaction total as three significant figures per contributing emoji rather than as the figure it prints.
What this channel posts
- Video runtime
- 12m 31s
- Average length
- 6m 16s
Measured directly from 2 videos with a duration reading, out of the posts we hold for this channel — not this channel’s whole posting history, only the sample this register has actually read. An exact reading to the second, taken from the post itself rather than from Telegram’s own rounded chrome, so it carries no ≈ mark.
Recent posts
Class decorators تو پایتون، یه جور جادوئه ✨! 🧙♂️ یه کلاس رو میگیرن، تغییرش میدن و یه کلاس جدید تحویل میدن. فرض کن میخوای یه سری ویژگی خاص به همه کلاسهات اضافه کنی، Class decorators اینجا به کارت میان. دیگه لازم نیست کد تکراری بنویسی! 😎 https://t.me/python7ir
💡 نکته #جاوا_اسکریپت 🟣 موضوع : جاوا اسکریپت ناهمگام (Asynchronous JavaScript) - Async/Await: مقایسه عملکرد Async/Await با Promises: خوانایی و نگهداری کد ✨ نکته : اگه میخوای عملکرد رو بهینه کنی، Async/Await میتونه کمک کنه، چون معمولا Promiseها رو بهتر مدیریت میکنه. 🔥 ـــــــــــــــــــــــــــــــــــــــــــــــــــــــــ لطفا ما رو به دیگران هم معرفی کنید... آدرس کانال اصلی : https://t.me/Tu_24 آدرس…
💡 نکته #React_js 🟣 موضوع : استفاده از ESLint و Prettier برای کیفیت کد ✨ نکته : یه فایل .prettierrc بساز و قوانین فرمتبندی مثل طول خط یا استفاده از single/double quote رو اونجا بذار. اینجوری کل پروژه یکدست میشه. 📝 ـــــــــــــــــــــــــــــــــــــــــــــــــــــــــ لطفا ما رو به دیگران هم معرفی کنید... آدرس کانال اصلی : https://t.me/Tu_24 آدرس وبسایت: https://Tutorial24.ir
🔵 آموزش گیت (Git) - gitignore و نحوه ساخت ریپازیتوری در گیت هاب 🟢 کیفیت : متوسط 🔴 توجه کنید این ویدیو با کیفیت متوسط می باشد. طی روزهای آینده نسخه های متفاوت با کیفیت بالاتر یا کم حجم تر از این نسخه در کانال قرار داده خواهد شد. 🟣 آموزش گیت (Git) 🟢 زبان آموزش: فارسی ـــــــــــــــــــــــــــــــــــــــــــــــــــــــــ لطفا ما رو به دیگران هم معرفی کنید... آدرس کانال اصلی : https://t.me/Tu_24 آدرس وبسای…
💡 نکته #جاوا_اسکریپت 🟣 موضوع : بهینهسازی عملکرد (Performance Optimization) و کارایی جاوا اسکریپت - بهینهسازی رویدادها: مدیریت حافظه و جلوگیری از Memory Leaks در Event Listeners ✨ نکته : اگه یه رویدادی فقط یک بار نیاز به اجرا داره، از { once: true } استفاده کن. مثل یه بمب ساعتی که بعد از یک بار انفجار، خودش محو میشه! 💣💥 ـــــــــــــــــــــــــــــــــــــــــــــــــــــــــ لطفا ما رو به دیگران هم معرف…
💡 نکته #React_js 🟣 موضوع : فرامین کنترلنشده (Uncontrolled Components) ✨ نکته : همیشه بین کنترلشده و کنترلنشده یکی رو انتخاب کن. انتخاب درست به نیاز پروژهات بستگی داره. هوشمندانه انتخاب کن! 🤔 ـــــــــــــــــــــــــــــــــــــــــــــــــــــــــ لطفا ما رو به دیگران هم معرفی کنید... آدرس کانال اصلی : https://t.me/Tu_24 آدرس وبسایت: https://Tutorial24.ir
💡 نکته #React 🟣 موضوع : بهینهسازی در اپلیکیشنهای React با SSR یا SSG (مثلاً با Next.js) ✨ نکته : واسه SEO و ایندکس شدن سایتت تو گوگل، SSR یه نعمته!😇 ربات های گوگل عاشقشن! 🤖 ـــــــــــــــــــــــــــــــــــــــــــــــــــــــــ لطفا ما رو به دیگران هم معرفی کنید... آدرس کانال اصلی : https://t.me/Tu_24 آدرس وبسایت: https://Tutorial24.ir
💡 نکته #جاوا_اسکریپت 🟣 موضوع : مدیریت خطا (Error Handling) و دیباگینگ (Debugging) - استفاده از ابزارهای تحلیل استاتیک (Static Analysis) و لینتینگ (Linting) مانند ESLint برای کیفیت کد و تشخیص زودهنگام مشکلات ✨ نکته : حتماً افزونه ESLint رو روی ادیتورت (مثلاً VS Code) نصب کن. اینجوری قبل از اینکه کد رو اجرا کنی، خطاها رو زیرشون خط میکشه! 🚀💡 ـــــــــــــــــــــــــــــــــــــــــــــــــــــــــ لطفا ما ر…
💡 نکته #React_js 🟣 موضوع : مدیریت آیکنها با React‑Icons ✨ نکته : توی سایت خود react-icons میتونی اسم هر آیکنی رو که میخوای جستجو کنی و سریع بفهمی از کجا باید واردش کنی. یه گنج واقعیه! 🗺️ ـــــــــــــــــــــــــــــــــــــــــــــــــــــــــ لطفا ما رو به دیگران هم معرفی کنید... آدرس کانال اصلی : https://t.me/Tu_24 آدرس وبسایت: https://Tutorial24.ir
💡 نکته #React 🟣 موضوع : useLayoutEffect – تفاوت با useEffect ✨ نکته : خلاصه و خودمونی: برای ظاهر و جلوگیری از پرش تصویر useLayoutEffect، برای هر چیز دیگهای useEffect. همین! 😎✌️ ـــــــــــــــــــــــــــــــــــــــــــــــــــــــــ لطفا ما رو به دیگران هم معرفی کنید... آدرس کانال اصلی : https://t.me/Tu_24 آدرس وبسایت: https://Tutorial24.ir
Iterator چیه و چجوری میشه یه دونهشو خودمون بسازیم؟ 🤔 فرض کن یه جعبه داری پر از وسیله. Iterator یه جور "اشارهگر"ه که بهت کمک میکنه دونه دونه وسیلهها رو برداری بدون اینکه کل جعبه رو بهم بریزی! 📦 تو پایتون، هر چیزی که `__iter__` و `__next__` داشته باشه، Iterator محسوب میشه. با یه کلاس ساده میتونی Iterator مخصوص خودتو بسازی و روال پیمایش دادههات رو کنترل کنی. ✨ #پایتون #آموزش #Iterator https://t.me/python7ir
Showing the 12 most recent of 20 posts we hold for @javascript7ir. View and reaction counts are the latest single reading for each post, not a live figure, and a recent post is still accumulating both. A view count marked ≈ was rounded by Telegram before we ever saw it — t.me prints views in full below 1,000 and to three significant figures above, so ≈1,200,000 means somewhere between 1,150,000 and 1,249,999. Unmarked counts are exact. Text is reproduced from the public post preview and truncated for length.
Citation-graph rank
Citation-graph rank — 1,125,091 of 1,151,006entries in the measured graph. A weighted position computed from the forward and mention edges below — republished posts weigh more than named mentions — and recomputed periodically, over the whole graph. Published only as this ordinal position, never as a score: a position is a fact, and a score printed beside one channel’s name would read as a verdict this register does not make. The two counts beneath stay separate for the same reason mentions are never summed with forwards anywhere else on this page — a named-by count costs nothing to manufacture. The top 100 by this measure, or how it is computed.
Mentions
Named by 1 registered channel — every channel on the register whose own posts have named this one, by its current username or any other username it currently holds, merged from two separately captured readings of the same fact so a namer caught by only one of them is not missed and a namer both caught is not counted twice. A username this channel has since dropped is not matched — that handle may belong to someone else now, and crediting today’s namer to yesterday’s owner would misattribute it.
Named by
Channels on the register whose posts name this channel's handle.
Names
Channels on the register whose handles appear in this channel's posts.
A mention is a weaker signal than a forward and is counted separately for that reason — naming a channel is not republishing it, and a handle in a post body is easy to place deliberately. The post counts beside each row below are distinct posts in which the handle appeared, from posts we have read on both sides — the “Named by N registered channels” figure above is a different count, of distinct NAMING CHANNELS rather than posts, and is not the sum of the rows under it.
Cite this entry
A live page changes as we take new readings, so a citation should name the measurement it is based on, not just the URL. The line below cites the subscriber count as measured 12 August 2026 — this entry's latest reading, not the date you are reading this.
“آموزش ویدیویی جاوا اسکریپت، Node.js ، React ، jQuery ، Vue و ...” (@javascript7ir), 1,606 subscribers as measured 12 August 2026. Telegram Register, tgregister.com/channel/javascript7ir.
Full measurement history, CC BY 4.0. Every reading this register holds for this entry, not just the latest one, as a dated, downloadable record: CSV · JSON. Free to use with attribution to tgregister.com. Each file carries its own generation timestamp, which is the figure to cite for exactly when the data was retrieved.