Basics of JavaScript Getting Started tutorial

B Station av9243452 a series of videos, suitable for people who have learned other programming languages, it's pretty good.

A total of 43 sections, the essay is 1~16 festival

JS Introduction

To use an external file, set the. js file in the "src" attribute of the <script> tag

<script src= "Js/jquery.min.js" ></script><script src= "Bootstrap/js/bootstrap.min.js" ></ Script>

Manipulating HTML elements, such as accessing an HTML element from JavaScript, you can use the document.getElementById (ID) method

        
            document.getElementById (' title '). innerhtml= ' Yinghualuowu '        </script>

JS syntax

Variable

JavaScript arrays can also be used with the new Array ()

Operator

All know, only say a ' = = = ' is congruent (value and type), plus the + number is also used for string concatenation

  var  i=10;             var  j=10;            document.write (i  ===j); document.write ( ' <br> '  var n=10;             var  m= '  ===m);            document.write ( ' <br> ' );             var  x=4,y= '  ===y); document.write ( ' <br> '); 

true false false

Conditional statements

If...else and switch

            var i;             Switch (i) {                Case 1:                    break;                  default :                      Break ;            }

Looping statements

I know all about it. A for/in loop iterates over the properties of an object

            var arr=[' A ', ' B ', ' C '];              for inch arr) {                document.write (Arr[i]+ ' <br> ');            }

Abc

Jump statement

Continue and break

Function

The rest of the knowledge is the same as other programming languages.

Basics of JavaScript Getting Started tutorial