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<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Javascript - Console assert</title> </head> <body> <h1>Open console by pressing <kbd>F12</kbd> or on mac press <kbd>cmd + opt + j</kbd>.</h1> <script> console.assert(false, "Statement is false"); var num = 10; console.assert(num > 20, "Number is less than 20"); console.assert(25 === "25", "25 is not equal to '25'", { "SomeObject": 12345 }); </script> </body> </html>
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