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JavaScript

OS


`getElementsByTagName()`	`getElementByTagName()`
`getElementsByName()`	`getElementByName()`
`getElementsByClassName()`	`getElementByClassName()`
`getElementById()`	`getElementsById()`


`elem.style.color = 'red';`	`elem.style.color = 'red;'`

js

function myFunction() {
  alert("This is my function.");
}

js

myFunction();

return

return JavaScript return

Firefox return Firefox "unreachable code after return statement"

vs

JavaScript

js

const myNumber = 0;

js

const myObject = {
  name: "Chris",
  age: 38,
};

JavaScript

JavaScript

JavaScript

JavaScript JavaScript

/

while do...while

JSON

addEventListener()

JavaScript

JavaScript

Web API

JavaScript DOM

MDN

MDN 2025228

GitHub

MDN curriculum
HTML
1. HTML
6. : HTML
8. : HTML
9. :
12. :
13. :
15. :
17. :
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21. :
23. :
24. :
25. HTML
26. : HTML
27. Additional tutorials
CSS
1. CSS
2. CSS
3. :
8. :
10. :
12. :
13. :
15. :
17. :
19. :
21. :
22. :
24. :
26. :
27. CSS
29. Additional tutorials
  4. CSS
CSS
5. :
CSS
3. :
5. :
7. :
8. CSS
9. : CSS
10. :
13. : RWD
14. :
15. :
16. Additional tutorials
JavaScript
1. JavaScript
2. JavaScript
5. :
7. :
10. :
12. :
13. :
15. :
17. :
21. :
24. :
26. :
27. DOM
28. :
30. JSON
31. : JSON
32. : UI
JavaScript
3. React
4. React ToDo
5. React
6. React :
7. React :
8. React
9. React
3. HTML
4. : HTML
5. CSS JS
6. : CSS/JS
7. WAI-ARIA
8. : WAI-ARIA
11. :
12. :
JavaScript
3. JavaScript
4. : JavaScript
6. :
7. : OOJS
Web API
5. API
JavaScript
3. API
5. :
4. HTML5
8. select
10. UI
13. Additional tutorials
  2. JS
  4. UI
2. Django (Python)
3. Express (Node.js)
4. Additional tutorials
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8. HTML
9. CSS
3. HTML CSS
1. CSS
2. HTML
3. JavaScript

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