One of many JavaScript HTML methods is getElementById().

This example uses the method to “find” an HTML element (with id=”demo”) and changes the element content (innerHTML) to “Hello JavaScript”:

JavaScript Can Change HTML Content

One of many JavaScript HTML methods is getElementById().

This example uses the method to “find” an HTML element (with id=”demo”) and changes the element content (innerHTML) to “Hello JavaScript”:

Example

<document.getElementById("demo").innerHTML = "Hello JavaScript";
>

 

JavaScript accepts both double and single quotes:

Example

<document.getElementById('demo').innerHTML = 'Hello JavaScript';
>

 

JavaScript Can Change HTML Styles (CSS)

Changing the style of an HTML element, is a variant of changing an HTML attribute:

Example

<document.getElementById("demo").style.fontSize = "35px";
>

 

JavaScript Can Hide HTML Elements

Hiding HTML elements can be done by changing the display style:

Example

<document.getElementById("demo").style.display = "none";
>

 

JavaScript Can Show HTML Elements

Showing hidden HTML elements can also be done by changing the display style:

Example

<document.getElementById("demo").style.display = "block";
>

 

This example uses the method to “find” an HTML element (with id=”demo”) and changes the element content (innerHTML) to “Hello JavaScript”:

Example

<document.getElementById("demo").innerHTML = "Hello JavaScript";
>

JavaScript accepts both double and single quotes:

Example

<document.getElementById('demo').innerHTML = 'Hello JavaScript';
>

 

JavaScript Can Change HTML Styles (CSS)

Changing the style of an HTML element, is a variant of changing an HTML attribute:

Example

<document.getElementById("demo").style.fontSize = "35px";
>

 

JavaScript Can Hide HTML Elements

Hiding HTML elements can be done by changing the display style:

Example

<document.getElementById("demo").style.display = "none";
>

 

JavaScript Can Show HTML Elements

Showing hidden HTML elements can also be done by changing the display style:

Example

<document.getElementById("demo").style.display = "block";
>



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