Basic JavaScript Learning

<--Directory--

1. js existence form and other

2. Functions

3. Self-executing function

4. Jquery3 Add Event

5. jquery Auto-increment style

6. Back to Top

7. Scroll bar

8. Happy Lantern

9. Search box

JS existence form and other

<! doctype html public  "-//w3c//dtd html 4.01//en" "Http://www.w3.org/TR/html4/strict.dtd ">

function. js
Alert (' Yang over ');//This is a single-line comment/* This is a multiline comment name=123 global variable setting var name=123 local variable setting * *///function variable, function declaration, function return Value name = ' 123 ' tes = ' test1 ' Foo (' wsyht1 ', ' wsyht2 ', ' wsyht3 ')//Assignment 1th, 2, 3-bit parameter bar () Bat () function Foo (name1,name2) {//pass 1th, 2-bit parameter var name3 = arguments[2];  var name4 = arguments[3];    Declaration of 3rd, 4-bit parameters, Console.log (name1) is not recommended, Console.log (name2); Console.log (Name3); Console.log (NAME4); Add a semicolon to write multiple statements, output 3, 4-bit parameters, the fourth bit is not assigned, then the output does not define return Console.log (NAME1);} function Bar () {tes = ' test2 '; console.log (name); Console.log (TES);}  function Bat () {var name = ' 456 '; console.log (name); }

Self-executing functions
/*var temp = function () { //anonymous function}*///self-executing function, no call, self-execution/* (function () {Console.log (' hello  World ');}) () *//* (function (name) {console.log (name);}) (' Wsyht ') *///declares an array//var arry = arry (12,3,4,5)/*var arry = [1,2,3,4]arry.push (' Wsyht '); Console.log (Arry); Arry.unshift (' wsy '); Console.log (Arry); Arry.splice (1,0, ' HT ');    // After 1 inserting the number ok,0 represents the insertion does not delete the meaning of  console.log (Arry); Arry.splice (100,0, ' OK ');  //inserts a number after 100 ok,0 represents the insertion does not delete the meaning of   Console.log (Arry); *///a = [1,2,3]//a[10] = 9//a//names = [1,22,33,44,55,66]// Names.slice (1,5)  //all digits following the 1th digit//dic = {' name ': ' Wsyht ', ' age ': 18}//dic = {' name ': {' xx ': ' Oo '}, ' age ': 18}//the first for loop var array = [11,22,33,44,55]var dict = {' name ': ' Wsyht ', ' Age ': 19}/*for (Var item in array) {Console.log (item)}for (var item in dict) { Console.log (Dict[item])}*///the second type for loop/*for (var i=0;i<array.length;i++) {Console.Log (Array[i]);} for (var i=0;i<10;i++) {Console.log (dict[i]);} */

JS Add Event
<! doctype html public  "-//w3c//dtd html 4.01//en" "Http://www.w3.org/TR/html4/strict.dtd ">

JS Auto-increment style
<! doctype html public  "-//w3c//dtd html 4.01//en" "Http://www.w3.org/TR/html4/strict.dtd ">

JS back to Top
<! doctype html public  "-//w3c//dtd html 4.01//en" "Http://www.w3.org/TR/html4/strict.dtd ">

JS scroll bar
<! doctype html public  "-//w3c//dtd html 4.01//en" "Http://www.w3.org/TR/html4/strict.dtd ">

JS Racing Light
<! doctype html public  "-//w3c//dtd html 4.01//en" "Http://www.w3.org/TR/html4/strict.dtd ">

JS search box
<! doctype html public  "-//w3c//dtd html 4.01//en" "Http://www.w3.org/TR/html4/strict.dtd ">

This article is from the "Wsyht90 blog" blog, make sure to keep this source http://wsyht90.blog.51cto.com/9014030/1854664
Basic JavaScript Learning