JavaScript
A resourceful newsletter featuring the latest and most important news, articles, books and updates in the world of #javascript 🚀 Don't miss our Quizzes! Let's chat: @nairihar
Show more📈 Analytical overview of Telegram channel JavaScript
Channel JavaScript (@javascript) in the English language segment is an active participant. Currently, the community unites 31 136 subscribers, ranking 4 163 in the Technologies & Applications category and 12 809 in the India region.
📊 Audience metrics and dynamics
Since its creation on невідомо, the project has demonstrated rapid growth, gathering an audience of 31 136 subscribers.
According to the latest data from 20 September, 2026, the channel demonstrates stable activity. Although there has been a change in the number of participants by -114 over the last 30 days and by -3 over the last 24 hours, overall reach remains high.
- Verification status: Not verified
- Engagement rate (ER): The average audience engagement rate is 6.21%. Within the first 24 hours after publication, content typically collects 2.30% reactions from the total number of subscribers.
- Post reach: On average, each post receives 1 933 views. Within the first day, a publication typically gains 715 views.
- Reactions and interaction: The audience actively supports content: the average number of reactions per post is 4.
- Thematic interests: Content is focused on key topics such as javascript, console.log(gen.next().value, processdata, remix, acc.
📝 Description and content policy
The author describes the resource as a platform for expressing subjective opinions:
“A resourceful newsletter featuring the latest and most important news, articles, books and updates in the world of #javascript 🚀 Don't miss our Quizzes!
Let's chat: @nairihar”
Thanks to the high frequency of updates (latest data received on 21 September, 2026), the channel maintains relevance and a high level of publication reach. Analytics show that the audience actively interacts with content, making it an important point of influence in the Technologies & Applications category.
class ValidationError extends Error {
constructor(message, code) {
super(message);
this.name = 'ValidationError';
this.code = code;
}
}
function processData(data) {
try {
if (!data) throw new ValidationError('Data required', 'MISSING_DATA');
return data.toUpperCase();
} catch (error) {
if (error instanceof ValidationError) {
console.log(`${error.name}: ${error.message} (${error.code})`);
} else {
console.log(`Unexpected error: ${error.message}`);
}
}
}
processData(null);
processData(42);class CustomError extends Error {
constructor(message, code) {
super(message);
this.name = 'CustomError';
this.code = code;
}
}
try {
throw new CustomError('Something went wrong', 500);
} catch (error) {
console.log(error instanceof Error);
console.log(error instanceof CustomError);
console.log(error.name);
console.log(typeof error.code);
}let cache = new Map();
let obj = { name: 'Emma', age: 28 };
function memoize(fn) {
return function(...args) {
const key = JSON.stringify(args);
if (cache.has(key)) {
console.log('Cache hit');
return cache.get(key);
}
const result = fn.apply(this, args);
cache.set(key, result);
return result;
};
}
const process = memoize((data) => {
console.log('Processing:', data.name);
return data.age * 2;
});
process(obj);
process(obj);
obj.age = 30;
process(obj);
console.log('Cache size:', cache.size);
const pattern = /(?<=\d)(?=(?:\d{3})+(?!\d))/g;
const str = '1234567890';
const result = str.replace(pattern, ',');
console.log(result);
const regex = /^(?=.*[a-z])(?=.*[A-Z])(?=.*\d)[a-zA-Z\d]{8,}$/;
const tests = ['Password1', 'password', 'PASSWORD1', 'Pass1'];
tests.forEach(test => {
console.log(`${test}: ${regex.test(test)}`);
});
const capture = /([a-z]+)(\d+)/g;
const text = 'item123 product456';
const matches = [...text.matchAll(capture)];
console.log(matches[1][1]);
const sym1 = Symbol('test');
const sym2 = Symbol('test');
const obj = {
[sym1]: 'value1',
[sym2]: 'value2',
regular: 'value3'
};
const sym3 = Symbol.for('global');
const sym4 = Symbol.for('global');
console.log(sym1 === sym2);
console.log(sym3 === sym4);
console.log(Object.keys(obj).length);
console.log(Object.getOwnPropertySymbols(obj).length);
const cache = new Map();
function createHandler(id) {
const data = { id, value: new Array(1000).fill(id) };
cache.set(id, data);
return function(action) {
if (action === 'get') return data;
if (action === 'clear') cache.delete(id);
};
}
const handler1 = createHandler('user-1');
const handler2 = createHandler('user-2');
handler1('clear');
console.log(cache.size);
console.log(handler1('get').id);
const nums = [1, 2, 3, 4, 5];
const result = nums
.filter(n => n > 2)
.map(n => n * 2)
.reduce((acc, n) => {
acc.push(n + 1);
return acc;
}, [])
.slice(1);
console.log(result);
console.log(nums);
