There are three printing methods in JavaScript, namely window.alert(), document.write() and console.log().

#The operating environment of this article: windows10 system, javascript 1.8.5, thinkpad t480 computer.

In JavaScript, we usually use the following three ways to print data:

• Use window.alert() to write the warning box

• Use document.write() to write HTML output

• Use console.log() to write to browser console

Let’s take a look at how they are used.

Using window.alert()

You can use an alert box to display data:

Example

   
我的第一张网页
 
我的第一个段落
   

Use document.write()

For testing purposes, it is more convenient to use document.write():

Example

   
我的第一张网页
 
我的第一个段落
   

Use console.log()

In the browser, you can Use the console.log() method to display data.

Please activate the browser console via F12 and select "Console" in the menu.

Example

   
我的第一张网页
 
我的第一个段落
   

Related video tutorial sharing:javascript video tutorial

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