JavaScript

\"; const sanitized = userInput .replace(/alert('xss')\";\nconst sanitized = userInput\n .replace(//g, '>')\n .replace(/\"/g, '"')\n .replace(/'/g, ''');\n\nconst credentials = {\n username: 'admin',\n password: 'secret123'\n};\n\nconst safeLog = (obj) => {\n const { password, ...safe } = obj;\n return JSON.stringify(safe);\n};\n\nconsole.log(sanitized);\nconsole.log(safeLog(credentials));","datePublished":"2025-10-18T06:31:23Z","dateModified":"2025-10-18T06:31:23Z","author":{"@type":"Organization","name":"JavaScript","url":"https://telemetr.io/uk/channels/1924414526-javascript","image":"https://img.tlmtr.io/c/26eE7Y/5370661389250710069?ty=x"},"publisher":{"@type":"Organization","name":"JavaScript","url":"https://telemetr.io/uk/channels/1924414526-javascript","image":"https://img.tlmtr.io/c/26eE7Y/5370661389250710069?ty=x"},"commentCount":0,"interactionStatistic":[{"@type":"InteractionCounter","interactionType":"https://schema.org/ViewAction","userInteractionCount":2708},{"@type":"InteractionCounter","interactionType":"https://schema.org/ShareAction","userInteractionCount":2}]}},{"@type":"ListItem","position":6,"item":{"@type":"SocialMediaPosting","@id":"https://telemetr.io/uk/channels/1924414526-javascript/posts/2722","url":"https://telemetr.io/uk/channels/1924414526-javascript/posts/2722","mainEntityOfPage":"https://telemetr.io/uk/channels/1924414526-javascript/posts/2722","headline":"JavaScript","datePublished":"2025-10-17T06:31:37Z","dateModified":"2025-10-17T06:31:37Z","author":{"@type":"Organization","name":"JavaScript","url":"https://telemetr.io/uk/channels/1924414526-javascript","image":"https://img.tlmtr.io/c/26eE7Y/5370661389250710069?ty=x"},"publisher":{"@type":"Organization","name":"JavaScript","url":"https://telemetr.io/uk/channels/1924414526-javascript","image":"https://img.tlmtr.io/c/26eE7Y/5370661389250710069?ty=x"},"commentCount":0,"interactionStatistic":[{"@type":"InteractionCounter","interactionType":"https://schema.org/ViewAction","userInteractionCount":2881},{"@type":"InteractionCounter","interactionType":"https://schema.org/LikeAction","userInteractionCount":3}]}},{"@type":"ListItem","position":7,"item":{"@type":"SocialMediaPosting","@id":"https://telemetr.io/uk/channels/1924414526-javascript/posts/2721","url":"https://telemetr.io/uk/channels/1924414526-javascript/posts/2721","mainEntityOfPage":"https://telemetr.io/uk/channels/1924414526-javascript/posts/2721","headline":"CHALLENGE const a = 9007199254740991n; const b = BigInt(9007199254740991); const c = 9007199254740992; const…","articleBody":"CHALLENGE\n\nconst a = 9007199254740991n;\nconst b = BigInt(9007199254740991);\nconst c = 9007199254740992;\nconst d = BigInt(9007199254740992);\n\nconsole.log(a === b);\nconsole.log(Number(a) === c);\nconsole.log(c === Number.MAX_SAFE_INTEGER + 1);\nconsole.log(d > a);\nconsole.log(typeof (a + 1n));\nconsole.log(Number(d) === c);","datePublished":"2025-10-17T06:31:37Z","dateModified":"2025-10-17T06:31:37Z","author":{"@type":"Organization","name":"JavaScript","url":"https://telemetr.io/uk/channels/1924414526-javascript","image":"https://img.tlmtr.io/c/26eE7Y/5370661389250710069?ty=x"},"publisher":{"@type":"Organization","name":"JavaScript","url":"https://telemetr.io/uk/channels/1924414526-javascript","image":"https://img.tlmtr.io/c/26eE7Y/5370661389250710069?ty=x"},"commentCount":0,"interactionStatistic":[{"@type":"InteractionCounter","interactionType":"https://schema.org/ViewAction","userInteractionCount":2842},{"@type":"InteractionCounter","interactionType":"https://schema.org/ShareAction","userInteractionCount":2}]}},{"@type":"ListItem","position":8,"item":{"@type":"SocialMediaPosting","@id":"https://telemetr.io/uk/channels/1924414526-javascript/posts/2720","url":"https://telemetr.io/uk/channels/1924414526-javascript/posts/2720","mainEntityOfPage":"https://telemetr.io/uk/channels/1924414526-javascript/posts/2720","headline":"👍 The Firefox team has put together a way for you to give input on which Interop proposals matter the most to…","articleBody":"👍 The Firefox team has put together a way for you to give input on which Interop proposals matter the most to you (above). Go to the Interop Feature Ranking site (GitHub account required) and drag the web platform features that matter most for you to the top.","datePublished":"2025-10-16T13:05:15Z","dateModified":"2025-10-16T13:05:15Z","author":{"@type":"Organization","name":"JavaScript","url":"https://telemetr.io/uk/channels/1924414526-javascript","image":"https://img.tlmtr.io/c/26eE7Y/5370661389250710069?ty=x"},"publisher":{"@type":"Organization","name":"JavaScript","url":"https://telemetr.io/uk/channels/1924414526-javascript","image":"https://img.tlmtr.io/c/26eE7Y/5370661389250710069?ty=x"},"commentCount":0,"interactionStatistic":[{"@type":"InteractionCounter","interactionType":"https://schema.org/ViewAction","userInteractionCount":3191},{"@type":"InteractionCounter","interactionType":"https://schema.org/LikeAction","userInteractionCount":4},{"@type":"InteractionCounter","interactionType":"https://schema.org/ShareAction","userInteractionCount":3}]}},{"@type":"ListItem","position":9,"item":{"@type":"SocialMediaPosting","@id":"https://telemetr.io/uk/channels/1924414526-javascript/posts/2719","url":"https://telemetr.io/uk/channels/1924414526-javascript/posts/2719","mainEntityOfPage":"https://telemetr.io/uk/channels/1924414526-javascript/posts/2719","headline":"JavaScript","datePublished":"2025-10-16T06:30:37Z","dateModified":"2025-10-16T06:30:37Z","author":{"@type":"Organization","name":"JavaScript","url":"https://telemetr.io/uk/channels/1924414526-javascript","image":"https://img.tlmtr.io/c/26eE7Y/5370661389250710069?ty=x"},"publisher":{"@type":"Organization","name":"JavaScript","url":"https://telemetr.io/uk/channels/1924414526-javascript","image":"https://img.tlmtr.io/c/26eE7Y/5370661389250710069?ty=x"},"commentCount":0,"interactionStatistic":[{"@type":"InteractionCounter","interactionType":"https://schema.org/ViewAction","userInteractionCount":3166},{"@type":"InteractionCounter","interactionType":"https://schema.org/LikeAction","userInteractionCount":6}]}},{"@type":"ListItem","position":10,"item":{"@type":"SocialMediaPosting","@id":"https://telemetr.io/uk/channels/1924414526-javascript/posts/2718","url":"https://telemetr.io/uk/channels/1924414526-javascript/posts/2718","mainEntityOfPage":"https://telemetr.io/uk/channels/1924414526-javascript/posts/2718","headline":"CHALLENGE class Observable { constructor(subscriber) { this.subscriber = subscriber; } subscribe(observer) {…","articleBody":"CHALLENGE\n\nclass Observable {\n constructor(subscriber) {\n this.subscriber = subscriber;\n }\n \n subscribe(observer) {\n return this.subscriber(observer);\n }\n \n map(fn) {\n return new Observable(observer => {\n return this.subscribe({\n next: value => observer.next(fn(value)),\n error: err => observer.error(err),\n complete: () => observer.complete()\n });\n });\n }\n}\n\nconst source = new Observable(observer => {\n observer.next(1);\n observer.next(2);\n observer.complete();\n});\n\nconst doubled = source.map(x => x * 2);\ndoubled.subscribe({\n next: value => console.log(value),\n complete: () => console.log('done')\n});","datePublished":"2025-10-16T06:30:37Z","dateModified":"2025-10-16T06:30:37Z","author":{"@type":"Organization","name":"JavaScript","url":"https://telemetr.io/uk/channels/1924414526-javascript","image":"https://img.tlmtr.io/c/26eE7Y/5370661389250710069?ty=x"},"publisher":{"@type":"Organization","name":"JavaScript","url":"https://telemetr.io/uk/channels/1924414526-javascript","image":"https://img.tlmtr.io/c/26eE7Y/5370661389250710069?ty=x"},"commentCount":0,"interactionStatistic":[{"@type":"InteractionCounter","interactionType":"https://schema.org/ViewAction","userInteractionCount":2867},{"@type":"InteractionCounter","interactionType":"https://schema.org/LikeAction","userInteractionCount":2}]}},{"@type":"ListItem","position":11,"item":{"@type":"SocialMediaPosting","@id":"https://telemetr.io/uk/channels/1924414526-javascript/posts/2717","url":"https://telemetr.io/uk/channels/1924414526-javascript/posts/2717","mainEntityOfPage":"https://telemetr.io/uk/channels/1924414526-javascript/posts/2717","headline":"👀 Viz.js 3.20: Work with Graphviz in the Browser Graphviz is a suite of open source graph drawing tools of ov…","articleBody":"👀 Viz.js 3.20: Work with Graphviz in the Browser\n\nGraphviz is a suite of open source graph drawing tools of over 30 years’ vintage. Viz.js is a WebAssembly Graphviz build that brings its functionality into the browser. GitHub repo.\n\nMichael Daines","datePublished":"2025-10-15T13:05:22Z","dateModified":"2025-10-15T13:05:22Z","author":{"@type":"Organization","name":"JavaScript","url":"https://telemetr.io/uk/channels/1924414526-javascript","image":"https://img.tlmtr.io/c/26eE7Y/5370661389250710069?ty=x"},"publisher":{"@type":"Organization","name":"JavaScript","url":"https://telemetr.io/uk/channels/1924414526-javascript","image":"https://img.tlmtr.io/c/26eE7Y/5370661389250710069?ty=x"},"commentCount":0,"interactionStatistic":[{"@type":"InteractionCounter","interactionType":"https://schema.org/ViewAction","userInteractionCount":2728},{"@type":"InteractionCounter","interactionType":"https://schema.org/LikeAction","userInteractionCount":9},{"@type":"InteractionCounter","interactionType":"https://schema.org/ShareAction","userInteractionCount":4}]}},{"@type":"ListItem","position":12,"item":{"@type":"SocialMediaPosting","@id":"https://telemetr.io/uk/channels/1924414526-javascript/posts/2716","url":"https://telemetr.io/uk/channels/1924414526-javascript/posts/2716","mainEntityOfPage":"https://telemetr.io/uk/channels/1924414526-javascript/posts/2716","headline":"JavaScript","datePublished":"2025-10-15T06:32:57Z","dateModified":"2025-10-15T06:32:57Z","author":{"@type":"Organization","name":"JavaScript","url":"https://telemetr.io/uk/channels/1924414526-javascript","image":"https://img.tlmtr.io/c/26eE7Y/5370661389250710069?ty=x"},"publisher":{"@type":"Organization","name":"JavaScript","url":"https://telemetr.io/uk/channels/1924414526-javascript","image":"https://img.tlmtr.io/c/26eE7Y/5370661389250710069?ty=x"},"commentCount":0,"interactionStatistic":[{"@type":"InteractionCounter","interactionType":"https://schema.org/ViewAction","userInteractionCount":2924},{"@type":"InteractionCounter","interactionType":"https://schema.org/LikeAction","userInteractionCount":11}]}},{"@type":"ListItem","position":13,"item":{"@type":"SocialMediaPosting","@id":"https://telemetr.io/uk/channels/1924414526-javascript/posts/2715","url":"https://telemetr.io/uk/channels/1924414526-javascript/posts/2715","mainEntityOfPage":"https://telemetr.io/uk/channels/1924414526-javascript/posts/2715","headline":"CHALLENGE class Calculator { static multiply(a, b) { return a * b; } static add = (a, b) => { return a + b; }…","articleBody":"CHALLENGE\n\nclass Calculator {\n static multiply(a, b) {\n return a * b;\n }\n \n static add = (a, b) => {\n return a + b;\n }\n}\n\nclass ScientificCalculator extends Calculator {\n static multiply(a, b) {\n return super.multiply(a, b) * 2;\n }\n}\n\nconsole.log(Calculator.multiply(3, 4));\nconsole.log(ScientificCalculator.add(5, 6));\nconsole.log(ScientificCalculator.multiply(2, 3));","datePublished":"2025-10-15T06:32:57Z","dateModified":"2025-10-15T06:32:57Z","author":{"@type":"Organization","name":"JavaScript","url":"https://telemetr.io/uk/channels/1924414526-javascript","image":"https://img.tlmtr.io/c/26eE7Y/5370661389250710069?ty=x"},"publisher":{"@type":"Organization","name":"JavaScript","url":"https://telemetr.io/uk/channels/1924414526-javascript","image":"https://img.tlmtr.io/c/26eE7Y/5370661389250710069?ty=x"},"commentCount":0,"interactionStatistic":[{"@type":"InteractionCounter","interactionType":"https://schema.org/ViewAction","userInteractionCount":2895},{"@type":"InteractionCounter","interactionType":"https://schema.org/LikeAction","userInteractionCount":4},{"@type":"InteractionCounter","interactionType":"https://schema.org/ShareAction","userInteractionCount":1}]}},{"@type":"ListItem","position":14,"item":{"@type":"SocialMediaPosting","@id":"https://telemetr.io/uk/channels/1924414526-javascript/posts/2714","url":"https://telemetr.io/uk/channels/1924414526-javascript/posts/2714","mainEntityOfPage":"https://telemetr.io/uk/channels/1924414526-javascript/posts/2714","headline":"📥 The Birth of Prettier The author takes us back ten years to the genesis of Prettier, the popular opinionate…","articleBody":"📥 The Birth of Prettier\n\nThe author takes us back ten years to the genesis of Prettier, the popular opinionated, deterministic code formatter he co-created with James Long. Prettier effectively introduced and popularized the practice of fully-automated AST-based code formatting in the JavaScript ecosystem.\n\nChristopher Chedeau (Vjeux)","datePublished":"2025-10-14T13:02:55Z","dateModified":"2025-10-14T13:02:55Z","author":{"@type":"Organization","name":"JavaScript","url":"https://telemetr.io/uk/channels/1924414526-javascript","image":"https://img.tlmtr.io/c/26eE7Y/5370661389250710069?ty=x"},"publisher":{"@type":"Organization","name":"JavaScript","url":"https://telemetr.io/uk/channels/1924414526-javascript","image":"https://img.tlmtr.io/c/26eE7Y/5370661389250710069?ty=x"},"commentCount":0,"interactionStatistic":[{"@type":"InteractionCounter","interactionType":"https://schema.org/ViewAction","userInteractionCount":2606},{"@type":"InteractionCounter","interactionType":"https://schema.org/LikeAction","userInteractionCount":14},{"@type":"InteractionCounter","interactionType":"https://schema.org/ShareAction","userInteractionCount":5}]}},{"@type":"ListItem","position":15,"item":{"@type":"SocialMediaPosting","@id":"https://telemetr.io/uk/channels/1924414526-javascript/posts/2713","url":"https://telemetr.io/uk/channels/1924414526-javascript/posts/2713","mainEntityOfPage":"https://telemetr.io/uk/channels/1924414526-javascript/posts/2713","headline":"JavaScript","datePublished":"2025-10-14T06:31:40Z","dateModified":"2025-10-14T06:31:40Z","author":{"@type":"Organization","name":"JavaScript","url":"https://telemetr.io/uk/channels/1924414526-javascript","image":"https://img.tlmtr.io/c/26eE7Y/5370661389250710069?ty=x"},"publisher":{"@type":"Organization","name":"JavaScript","url":"https://telemetr.io/uk/channels/1924414526-javascript","image":"https://img.tlmtr.io/c/26eE7Y/5370661389250710069?ty=x"},"commentCount":0,"interactionStatistic":[{"@type":"InteractionCounter","interactionType":"https://schema.org/ViewAction","userInteractionCount":2833},{"@type":"InteractionCounter","interactionType":"https://schema.org/LikeAction","userInteractionCount":9}]}},{"@type":"ListItem","position":16,"item":{"@type":"SocialMediaPosting","@id":"https://telemetr.io/uk/channels/1924414526-javascript/posts/2712","url":"https://telemetr.io/uk/channels/1924414526-javascript/posts/2712","mainEntityOfPage":"https://telemetr.io/uk/channels/1924414526-javascript/posts/2712","headline":"CHALLENGE const obj = { name: 'Sarah', greet() { return `Hello, ${this.name}`; }, delayedGreet() { const fn =…","articleBody":"CHALLENGE\n\nconst obj = {\n name: 'Sarah',\n greet() {\n return `Hello, ${this.name}`;\n },\n delayedGreet() {\n const fn = function() {\n return this.greet();\n };\n return fn.call(this);\n }\n};\n\nconst result = obj.delayedGreet();\nconsole.log(result);","datePublished":"2025-10-14T06:31:40Z","dateModified":"2025-10-14T06:31:40Z","author":{"@type":"Organization","name":"JavaScript","url":"https://telemetr.io/uk/channels/1924414526-javascript","image":"https://img.tlmtr.io/c/26eE7Y/5370661389250710069?ty=x"},"publisher":{"@type":"Organization","name":"JavaScript","url":"https://telemetr.io/uk/channels/1924414526-javascript","image":"https://img.tlmtr.io/c/26eE7Y/5370661389250710069?ty=x"},"commentCount":0,"interactionStatistic":[{"@type":"InteractionCounter","interactionType":"https://schema.org/ViewAction","userInteractionCount":2781},{"@type":"InteractionCounter","interactionType":"https://schema.org/LikeAction","userInteractionCount":3},{"@type":"InteractionCounter","interactionType":"https://schema.org/ShareAction","userInteractionCount":4}]}},{"@type":"ListItem","position":17,"item":{"@type":"SocialMediaPosting","@id":"https://telemetr.io/uk/channels/1924414526-javascript/posts/2711","url":"https://telemetr.io/uk/channels/1924414526-javascript/posts/2711","mainEntityOfPage":"https://telemetr.io/uk/channels/1924414526-javascript/posts/2711","headline":"💌 Vite: The Documentary From the same creators of the fantastic 😉 Node.js, 😉 Angular and 😉 React documentarie…","articleBody":"💌 Vite: The Documentary\n\nFrom the same creators of the fantastic 😉 Node.js, 😉 Angular and 😉 React documentaries comes an up to date look at Vite, the build tool that has taken the JavaScript ecosystem by storm in recent years. Many luminaries make an appearance to tell their stories, including Evan You, Rich Harris, and Ryan Carniato. (39 minutes.)\n\nCultRepo","datePublished":"2025-10-13T12:04:14Z","dateModified":"2025-10-13T12:04:14Z","author":{"@type":"Organization","name":"JavaScript","url":"https://telemetr.io/uk/channels/1924414526-javascript","image":"https://img.tlmtr.io/c/26eE7Y/5370661389250710069?ty=x"},"publisher":{"@type":"Organization","name":"JavaScript","url":"https://telemetr.io/uk/channels/1924414526-javascript","image":"https://img.tlmtr.io/c/26eE7Y/5370661389250710069?ty=x"},"commentCount":0,"interactionStatistic":[{"@type":"InteractionCounter","interactionType":"https://schema.org/ViewAction","userInteractionCount":2991},{"@type":"InteractionCounter","interactionType":"https://schema.org/LikeAction","userInteractionCount":8},{"@type":"InteractionCounter","interactionType":"https://schema.org/ShareAction","userInteractionCount":10}]}},{"@type":"ListItem","position":18,"item":{"@type":"SocialMediaPosting","@id":"https://telemetr.io/uk/channels/1924414526-javascript/posts/2710","url":"https://telemetr.io/uk/channels/1924414526-javascript/posts/2710","mainEntityOfPage":"https://telemetr.io/uk/channels/1924414526-javascript/posts/2710","headline":"JavaScript","datePublished":"2025-10-13T06:31:21Z","dateModified":"2025-10-13T14:31:07Z","author":{"@type":"Organization","name":"JavaScript","url":"https://telemetr.io/uk/channels/1924414526-javascript","image":"https://img.tlmtr.io/c/26eE7Y/5370661389250710069?ty=x"},"publisher":{"@type":"Organization","name":"JavaScript","url":"https://telemetr.io/uk/channels/1924414526-javascript","image":"https://img.tlmtr.io/c/26eE7Y/5370661389250710069?ty=x"},"commentCount":0,"interactionStatistic":[{"@type":"InteractionCounter","interactionType":"https://schema.org/ViewAction","userInteractionCount":831},{"@type":"InteractionCounter","interactionType":"https://schema.org/LikeAction","userInteractionCount":3},{"@type":"InteractionCounter","interactionType":"https://schema.org/ShareAction","userInteractionCount":1}]}},{"@type":"ListItem","position":19,"item":{"@type":"SocialMediaPosting","@id":"https://telemetr.io/uk/channels/1924414526-javascript/posts/2709","url":"https://telemetr.io/uk/channels/1924414526-javascript/posts/2709","mainEntityOfPage":"https://telemetr.io/uk/channels/1924414526-javascript/posts/2709","headline":"CHALLENGE const obj = { valueOf: () => 42, toString: () => '24' }; const results = [ obj + '', +obj, obj == 4…","articleBody":"CHALLENGE\n\nconst obj = {\n valueOf: () => 42,\n toString: () => '24'\n};\n\nconst results = [\n obj + '',\n +obj,\n obj == 42,\n obj === 42,\n String(obj),\n Number(obj)\n];\n\nconsole.log(results);","datePublished":"2025-10-13T06:31:21Z","dateModified":"2025-10-13T14:27:27Z","author":{"@type":"Organization","name":"JavaScript","url":"https://telemetr.io/uk/channels/1924414526-javascript","image":"https://img.tlmtr.io/c/26eE7Y/5370661389250710069?ty=x"},"publisher":{"@type":"Organization","name":"JavaScript","url":"https://telemetr.io/uk/channels/1924414526-javascript","image":"https://img.tlmtr.io/c/26eE7Y/5370661389250710069?ty=x"},"commentCount":0,"interactionStatistic":[{"@type":"InteractionCounter","interactionType":"https://schema.org/ViewAction","userInteractionCount":812},{"@type":"InteractionCounter","interactionType":"https://schema.org/LikeAction","userInteractionCount":1},{"@type":"InteractionCounter","interactionType":"https://schema.org/ShareAction","userInteractionCount":2}]}},{"@type":"ListItem","position":20,"item":{"@type":"SocialMediaPosting","@id":"https://telemetr.io/uk/channels/1924414526-javascript/posts/2708","url":"https://telemetr.io/uk/channels/1924414526-javascript/posts/2708","mainEntityOfPage":"https://telemetr.io/uk/channels/1924414526-javascript/posts/2708","headline":"JavaScript","datePublished":"2025-10-12T06:34:36Z","dateModified":"2025-10-12T06:34:36Z","author":{"@type":"Organization","name":"JavaScript","url":"https://telemetr.io/uk/channels/1924414526-javascript","image":"https://img.tlmtr.io/c/26eE7Y/5370661389250710069?ty=x"},"publisher":{"@type":"Organization","name":"JavaScript","url":"https://telemetr.io/uk/channels/1924414526-javascript","image":"https://img.tlmtr.io/c/26eE7Y/5370661389250710069?ty=x"},"commentCount":0,"interactionStatistic":[{"@type":"InteractionCounter","interactionType":"https://schema.org/ViewAction","userInteractionCount":2997},{"@type":"InteractionCounter","interactionType":"https://schema.org/LikeAction","userInteractionCount":8}]}}]}