JavaScript Learning Notes

Basic syntax, judgment statements, loops, functions, etc. skip.

Usage of 1.PARSEINT

var a=parseint (document.getElementById ("Txt1"). value); var b=parseint (document.getElementById ("Txt2"). value); var c;c=a+b;

If parseint is not used here, then the addition of a and B becomes a concatenation of two strings.

2. Date

(1) The difference between getYear () and getFullYear ()

var now=New  Date (); var year=now.getyear (); // The result is 115. Because it's the result of subtracting 1900 from this year. var year2=now.getfullyear (); // The result is

(2) The difference between getDate () and Getday ()

var now=New  Date (); var day=now.getdate (); // get today's date (not including month) var week=now.getday (); // The result is today's week.

(3) When the second and the year is not the same, after the addition of a "s".

3. String

(1) String case conversion

var str= "Hello world!" ; var s1=str.tolowercase (); // Turn all lowercase var s2=str.touppercase (); // Turn all Capitals

　　

JavaScript Learning Notes