node.js: console.assert(value[, ...message])

console.assert(value[, ...message])

If the value is evaluated to false, then the message is logged. If the value is evaluated to true, nothing will happen.

HelloWorld.js

/* This message is not logged */
console.assert((10 == 10), "%d is equal to %d", 10, 10);

/* This message is logged */
console.assert((10 == 11), "%d is not equal to %d", 10, 11);

Output

Assertion failed: 10 is not equal to 11

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