JavaScript does not provide any built-in print or display function.
JavaScript display program
JavaScript can "display" data in different ways:
- Use window.alert () written warning box
- Use document.write () writes the HTML output
- Use innerHTML write HTML elements
- Use console.log () is written to the browser console
Using innerHTML
To access the HTML elements, JavaScript can use document.getElementById (id) method.
id attribute defines HTML elements. innerHTML attribute defines HTML content:
Examples
<! DOCTYPE HTML> <HTML> <body> <h1> My first website </ h1> <the p-> My first paragraph </ the p-> <the p-the above mentioned id = "Demo"> </ the p-> < Script> document.getElementById ( "Demo") the innerHTML + =. 5. 6. ; </ Script> </ body> </ HTML>
Using document.write ()
For testing purposes, using document.write () is more convenient:
<! DOCTYPE HTML> <HTML> <body> <h1 of> My first page </ h1 of> <P> My first paragraph </ P> <Script> document.write ( . 5 +. 6 ); < / Script> </ body> </ HTML>
Use window.alert ()
You can use the alert box to display the data:
Examples
<! DOCTYPE HTML> <HTML> <body> <h1 of> My first page </ h1 of> <P> My first paragraph </ P> <Script> window.alert ( . 5 +. 6 ); < / Script> </ body> </ HTML>
Use console.log ()
In the browser, you can use console.log () method to display the data.
Please activate the browser console through F12, and select the menu "Console"
<! DOCTYPE HTML> <HTML> <body> <h1 of> My first page </ h1 of> <P> My first paragraph </ P> <Script> the console.log ( . 5 +. 6 ); < / Script> </ body> </ HTML>
Source: soft Technology (www.sysoft.net.cn)