When developing, debugging, or troubleshooting web applications, console.log is one of the most frequently used tools by developers. It offers a straightforward method for outputting data to the console, which helps in understanding code execution and locating problems. Still, a lot of developers are just utilizing a small portion of console.log's capabilities. In this article, we'll look at many console.log tips to help you with debugging and development. Basic Tricks: Multiple Values: Log multiple values with commas separating them console.log("Message: Hi Dhanush", 10, true); Template Literals: Use template literals for formatted strings: const name = "Dhanush"; console.log(`Hello, ${name}!`); Formatting and Organization: console.table: Present data in a neat table format: const data = { name: "Dhanush", hobby: "Chess" }; console.table(data); console.group/groupCollapsed: Organize logs with collapsible sections: console.group("Network Info"); console.log("IP:", "192.168.1.1"); console.groupCollapsed("Details"); // Use for initially hidden sections console.log("MAC Address:", "AA:BB:CC:DD:EE:FF"); console.groupEnd(); console.groupEnd(); console.clear: Clear the console for a fresh start. Advanced Debugging: console.dir: Get a detailed object structure view: const person = { name: "Dhanush", hobbies: ["youtube", "chess"] }; console.dir(person); console.assert: Log only if a condition fails (useful for debugging assumptions): const age = 18; console.assert(age >= 21, "User must be over 21"); console.count/console.countReset: Create a counter for tracking occurrences: console.count("API Calls"); // Increments each time called console.count("API Calls"); console.countReset("API Calls"); // Resets the counter console.count("API Calls"); console.time/console.timeEnd: Measure code execution time: console.time("Loop Time"); for (let i = 0; i < 1000; i++) { // Do something } console.timeEnd("Loop Time"); console.trace: Print a stack trace to pinpoint where an error occurred. function a() { function b() { console.trace(); } b(); } a(); Browser Information and Interaction: console.log(console): Explore the available console methods themselves. console.log(console) console.log(navigator): Access browser information (user agent, language, etc.). console.log(navigator) Fun and Creative Uses: ASCII Art: Create basic images using console characters: console.log(" ____") console.log(" / _ \\") console.log(" ( o.o )") console.log(" \\___/") Simple Animations: Combine console.clear with multiple lines for basic animations. let position = 0; const width = 20; // Width of the console "screen" const speed = 100; // Speed of the animation (in milliseconds) function animate() { console.clear(); let output = ''; // Create a string with spaces followed by a dot for (let i = 0; i < width; i++) { if (i === position) { output += '●'; // The moving dot } else { output += ' '; } } console.log(output); // Update position position++; // Reset position to create a looping animation if (position >= width) { position = 0; } } // Set an interval to update the animation frame setInterval(animate, speed); Logging Levels (Browser Dependent): console.log: General information. console.debug: Debugging messages (often hidden by default). console.info: Informational messages. console.warn: Warning messages (usually yellow text). console.error: Error messages (usually red text). console.log('This is a general information message.'); console.debug('This is a debugging message.'); console.info('This is an informational message.'); console.warn('This is a warning message.'); console.error('This is an error message.'); Thanks for reading, please give a like as a sort of encouragement and also share this post in socials to show your extended support. Follow for more ⏬ Twitter / Instagram / Github / Youtube / Newsletter / **Discord When developing, debugging, or troubleshooting web applications, console.log is one of the most frequently used tools by developers. It offers a straightforward method for outputting data to the console, which helps in understanding code execution and locating problems. Still, a lot of developers are just utilizing a small portion of console.log's capabilities. In this article, we'll look at many console.log tips to help you with debugging and development. Basic Tricks: Multiple Values: Log multiple values with commas separating them Multiple Values: Log multiple values with commas separating them Multiple Values: console.log("Message: Hi Dhanush", 10, true); console.log("Message: Hi Dhanush", 10, true); Template Literals: Use template literals for formatted strings: Template Literals: Use template literals for formatted strings: Template Literals: const name = "Dhanush"; console.log(`Hello, ${name}!`); const name = "Dhanush"; console.log(`Hello, ${name}!`); Formatting and Organization: console.table: Present data in a neat table format: console.table: Present data in a neat table format: console.table: const data = { name: "Dhanush", hobby: "Chess" }; console.table(data); const data = { name: "Dhanush", hobby: "Chess" }; console.table(data); console.group/groupCollapsed: Organize logs with collapsible sections: console.group/groupCollapsed: Organize logs with collapsible sections: console.group/groupCollapsed: console.group("Network Info"); console.log("IP:", "192.168.1.1"); console.groupCollapsed("Details"); // Use for initially hidden sections console.log("MAC Address:", "AA:BB:CC:DD:EE:FF"); console.groupEnd(); console.groupEnd(); console.group("Network Info"); console.log("IP:", "192.168.1.1"); console.groupCollapsed("Details"); // Use for initially hidden sections console.log("MAC Address:", "AA:BB:CC:DD:EE:FF"); console.groupEnd(); console.groupEnd(); console.clear: Clear the console for a fresh start. console.clear: Clear the console for a fresh start. console.clear: Advanced Debugging: console.dir: Get a detailed object structure view: console.dir: Get a detailed object structure view: console.dir: const person = { name: "Dhanush", hobbies: ["youtube", "chess"] }; console.dir(person); const person = { name: "Dhanush", hobbies: ["youtube", "chess"] }; console.dir(person); console.assert: Log only if a condition fails (useful for debugging assumptions): console.assert: Log only if a condition fails (useful for debugging assumptions): console.assert: const age = 18; console.assert(age >= 21, "User must be over 21"); const age = 18; console.assert(age >= 21, "User must be over 21"); console.count/console.countReset: Create a counter for tracking occurrences: console.count/console.countReset: Create a counter for tracking occurrences: console.count/console.countReset: console.count("API Calls"); // Increments each time called console.count("API Calls"); console.countReset("API Calls"); // Resets the counter console.count("API Calls"); console.count("API Calls"); // Increments each time called console.count("API Calls"); console.countReset("API Calls"); // Resets the counter console.count("API Calls"); console.time/console.timeEnd: Measure code execution time: console.time/console.timeEnd: Measure code execution time: console.time/console.timeEnd: console.time("Loop Time"); for (let i = 0; i < 1000; i++) { // Do something } console.timeEnd("Loop Time"); console.time("Loop Time"); for (let i = 0; i < 1000; i++) { // Do something } console.timeEnd("Loop Time"); console.trace: Print a stack trace to pinpoint where an error occurred. console.trace: Print a stack trace to pinpoint where an error occurred. console.trace: function a() { function b() { console.trace(); } b(); } a(); function a() { function b() { console.trace(); } b(); } a(); Browser Information and Interaction: console.log(console): Explore the available console methods themselves. console.log(console) console.log(console) console.log(navigator): Access browser information (user agent, language, etc.). console.log(navigator): Access browser information (user agent, language, etc.). console.log(navigator): console.log(navigator) console.log(navigator) Fun and Creative Uses: ASCII Art: Create basic images using console characters: ASCII Art: Create basic images using console characters: ASCII Art: console.log(" ____") console.log(" / _ \\") console.log(" ( o.o )") console.log(" \\___/") console.log(" ____") console.log(" / _ \\") console.log(" ( o.o )") console.log(" \\___/") Simple Animations: Combine console.clear with multiple lines for basic animations. Simple Animations: Combine console.clear with multiple lines for basic animations. Simple Animations: let position = 0; const width = 20; // Width of the console "screen" const speed = 100; // Speed of the animation (in milliseconds) function animate() { console.clear(); let output = ''; // Create a string with spaces followed by a dot for (let i = 0; i < width; i++) { if (i === position) { output += '●'; // The moving dot } else { output += ' '; } } console.log(output); // Update position position++; // Reset position to create a looping animation if (position >= width) { position = 0; } } // Set an interval to update the animation frame setInterval(animate, speed); let position = 0; const width = 20; // Width of the console "screen" const speed = 100; // Speed of the animation (in milliseconds) function animate() { console.clear(); let output = ''; // Create a string with spaces followed by a dot for (let i = 0; i < width; i++) { if (i === position) { output += '●'; // The moving dot } else { output += ' '; } } console.log(output); // Update position position++; // Reset position to create a looping animation if (position >= width) { position = 0; } } // Set an interval to update the animation frame setInterval(animate, speed); Logging Levels (Browser Dependent): console.log: General information. console.debug: Debugging messages (often hidden by default). console.info: Informational messages. console.warn: Warning messages (usually yellow text). console.error: Error messages (usually red text). console.log: General information. console.log: console.debug: Debugging messages (often hidden by default). console.debug: console.info: Informational messages. console.info: console.warn: Warning messages (usually yellow text). console.warn: console.error: Error messages (usually red text). console.error: console.log('This is a general information message.'); console.debug('This is a debugging message.'); console.info('This is an informational message.'); console.warn('This is a warning message.'); console.error('This is an error message.'); console.log('This is a general information message.'); console.debug('This is a debugging message.'); console.info('This is an informational message.'); console.warn('This is a warning message.'); console.error('This is an error message.'); Thanks for reading, please give a like as a sort of encouragement and also share this post in socials to show your extended support. Thanks for reading, please give a like as a sort of encouragement and also share this post in socials to show your extended support. Follow for more ⏬ Follow for more ⏬ Twitter / Instagram / Github / Youtube / Newsletter / ** Discord Twitter Twitter Twitter / Instagram Instagram Instagram / Github Github Github / Youtube Youtube Youtube / Newsletter Newsletter Newsletter / Discord Discord
