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HTML5 Mobile Development Road (--javascript) Review 2

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This paper is the official HTML5 training course for Brother Lian it education organization, mainly introduces: HTML5 Mobile Development Road (2)--javascript review

JavaScript Object-Oriented basics

1, how to define a class, use the following syntax to create a class

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  2. function person (name, age) { //used to capitalize the first letter

  4. //this modified variables are called Properties

  6. this.name = name;

  8. this.age = age;

  10. //If the property value is a function, then this property is a method

  12. This.play = function () {

  14. Alert (' play football ... ');

  16. };

  18. }

2. How to create an instance of this class

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    1. var p = New Person (' ZS ', 22);

    2. P.play ();

    3. P.name;

3. Two other ways to create JavaScript objects

(1) First create an instance of type object and then add new properties and methods

JavaScript is a dynamic language that can add new properties and methods to objects at run time

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    1. var obj = new Object ();

    2. Obj.name = ' ZS ';

    3. Obj.age = 22;

    4. Obj.play = function () {

    5. Alert (' play ... ');

    6. };

(2) using the "JSON" syntax

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    1. var p = {' name ':' Zs ',' age ': 22};

    2. Ar p = {' name ':' Zs ',' play ':function () {

    3. Alert (' hello ');

    4. };

Or

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    1. var p = {name:' Zs ', Age:22,marrid:false};

    2. var p = {name:' Zs ', Play:function () {

    3. Alert (' hello ');

    4. }};

Property value if the string must be enclosed in quotation marks (single-pair)

Property value allows Number,string,boolean,null,object

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    1. var p = {name:' Zs ',

    2. address:{

    3. City:' Beijing ',

    4. Street:' CA '

    5. }

    6. };

A complete example

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  2. <html>

  4. <head>

  6. <script>

  8. Function F1 () {

  10. var p = {' name ': ' Zs ', ' age ': 22};

  12. var p = {name: ' Zs ', age:22,marrid:false};

  14. var p = {name: ' Zs ',

  16. address:{

  18. City: ' Beijing ',

  20. Street: ' CA '

  22. }

  24. };

  26. alert (p.name);

  28. alert (p.address.city);

  30. }

  32. function F2 () {

  34. var arr = [

  36. {' name ': ' Zs ', ' age ': 22},

  38. {' name ': ' ls ', ' Age ': 32}

  40. ];

  42. alert (arr[1].name);

  44. }

  46. </Script>

  48. </head>

  50. <body>

  52. <input type="button" value= "clickMe" onclick="F2 ();" />

  54. </Body>

  56. </html>


HTML5 Mobile Development Road (--javascript) Review 2

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