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Is there a simple built-in way to output formatted data to console in Node.js?
Indent, align field to left or right, add leading zeros?
824
log() function from console class of Node. js is used to display the messages on the console. It prints to stdout with newline. Parameter: This function contains multiple parameters which are to be printed.
We can print messages to the console conditionally with console. assert() . If the first argument is false, then the message will be logged. If we were to change isItWorking to true , then the message will not be logged.
console. log("Hello", "World"); Output: This will print Hello World in the console.
Two new(1) built in methods String.Prototype.padStart and String.Prototype.padEnd were introduced in ES2017 (ES8) which perform the required padding functions.
(1) node >= 8.2.1 (or >= 7.5.0 if run with the --harmony flag)
Examples from the mdn page:
'abc'.padStart(10); // " abc" 'abc'.padStart(10, "foo"); // "foofoofabc" 'abc'.padStart(6,"123465"); // "123abc" 'abc'.padStart(8, "0"); // "00000abc" 'abc'.padStart(1); // "abc" 'abc'.padEnd(10); // "abc " 'abc'.padEnd(10, "foo"); // "abcfoofoof" 'abc'.padEnd(6, "123456"); // "abc123" 'abc'.padEnd(1); // "abc" For indenting a json onto the console try using JSON.stringify. The third parameter provides the indention required.
JSON.stringify({ a:1, b:2, c:3 }, null, 4); // { // "a": 1, // "b": 2, // "c": 3 // } If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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