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Chrome DevTools -- hidden features for debugging
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DevToolsconsole.tablebreakpointlogpointCoveragePerformance tabmonitor
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Problem
Developers only use console.log for debugging. Chrome DevTools has powerful features that most developers never discover.
Solution
Essential DevTools features: (1) console.table(array): display as table. (2) console.trace(): show call stack. (3) console.time/timeEnd: measure duration. (4) copy(obj): copy any value to clipboard. (5) $0: reference currently selected element. (6) monitor(fn): log every call to a function. (7) Conditional breakpoints: right-click line number. (8) Logpoints: log without modifying code. (9) Network: right-click > Copy as fetch/cURL. (10) Performance: record, find long tasks. (11) Coverage tab: find unused CSS/JS.
Why
console.log requires modifying code and reloading. DevTools features are faster, more powerful, and do not require code changes.
Code Snippets
Advanced console methods
// console.table -- structured display
console.table(users, ['name', 'email', 'role']);
// console.group -- nested output
console.group('User Processing');
console.log('Step 1...');
console.groupEnd();
// console.time -- measure duration
console.time('fetch');
await fetch('/api/data');
console.timeEnd('fetch'); // fetch: 142.5ms
// console.assert -- conditional logging
console.assert(user.age > 0, 'Age must be positive', user);
// Styled console output
console.log('%cImportant!', 'color: red; font-size: 20px');Revisions (0)
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