console | Sign-t-ada

JavaScript30 is 30-day vanilla javaScript coding challenge by Wes Bos (@wesbos). The purpose of these posts is to reflect my troubles and moments of ahhaa. Lessons from Day 9: Demo - Day 9 Some console tricks (on Win Ctrl+Shift+I)

Interpolated strings in console.log()

    console.log('Hello');
    console.log('I am a %s string', 'awesome' );
    var string = "awesome";
    console.log(`I am ${string} string`);

Styling console.log()

    console.log('%c I am awesome string', 'color:#BADA55; font-size:20px;');

Warning—console.warn()
```
    console.warn("No!");
```
Error—console.error()
```
    console.error("Smth went wrong!");
```

Info—console.info()

 console.info("console.info() is for providing info!");

Clearing console—console.clear()— simpliest way to clear console.

Testing—console.assert() - returns only if the statemeny is false

    console.assert (1===1, 'That is true'); // won't show anything
    console.assert (1===2, 'That is wrong'); //shows text

    const p = document.querySelector('p');
    console.assert (p.classList.contains('whatever'), 'No such class!');

Viewing DOM elements—console.dir

 console.log(p); //shows actual element itself
 console.dir(p); // shows all the element's attributes and methods

Image shows only a fragment of console.dir():

Grouping together—console.group()—uncollapsed version

dogs.forEach(dog => {
      console.group(`${dog.name}`); // uncollapsed
      console.log(`This dog is ${dog.age} years old`);
      console.groupEnd(`${dog.name}`); // important to put otherwise inside each other

    });

Grouping together—console.group()—collapsed version

dogs.forEach(dog => {
      console.groupCollapsed(`${dog.name}`); // collapsed
       console.log(`This dog is ${dog.age} years old`);
      console.groupEnd(`${dog.name}`); // important to put otherwise inside eacother

    });

Hugo is clicked open to show provided information:

Counting—console.count()

    console.count('S');
    console.count('S');
    console.count('R');
    console.count('S');
    console.count('S');
    console.count('T');
    console.count('T');
    console.count('S');
    console.count('L');

Timing—console.time()— how long operation takes time

console.time('fetching data');
    fetch('https://api.github.com/users/wesbos')
    .then(data => data.json())
    .then(data =>{
      console.timeEnd('fetcing data');
      console.log(data);
    });

console.table()—displays tabular data as table

console.log(dogs);
console.table(dogs);//same size of objects

Day 9 code on github.

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Tag Archives: console

JavaScript30 – Day 9