- Javascript - Page Printing
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- Javascript - Dialog Boxes
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- Javascript - Cookies
- Javascript - Events
- Javascript - Functions
- Javascript - Loop Control
- Javascript - For...in
- Javascript - For Loop
- Javascript - While Loop
- Javascript - Switch Case
- Javascript - If...Else
- Javascript - Operators
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- Javascript - Placement
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- Javascript - Syntax
- Javascript - Overview
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JavaScript Objects
- Javascript - HTML DOM
- Javascript - RegExp
- Javascript - Math
- Javascript - Date
- Javascript - Arrays
- Javascript - Strings
- Javascript - Boolean
- Javascript - Number
- Javascript - Objects
JavaScript Advanced
- Javascript - Browsers
- Javascript - Image Map
- Javascript - Debugging
- Javascript - Multimedia
- Javascript - Animation
- Javascript - Validations
- Javascript - Error Handling
JavaScript Useful Resources
- Javascript - Resources
- Javascript - Functions
- Javascript - Quick Guide
- Javascript - Questions And Answers
Selected Reading
- Who is Who
- Computer Glossary
- HR Interview Questions
- Effective Resume Writing
- Questions and Answers
- UPSC IAS Exams Notes
JavaScript Built-in Functions
Number Methods
The Number object contains only the default methods that are part of every object s definition.
Sr.No. | Method & Description |
---|---|
1 | Returns the function that created this object s instance. By default this is the Number object. |
2 | Forces a number to display in exponential notation, even if the number is in the range in which JavaScript normally uses standard notation. |
3 | Formats a number with a specific number of digits to the right of the decimal. |
4 | Returns a string value version of the current number in a format that may vary according to a browser s locale settings. |
5 | Defines how many total digits (including digits to the left and right of the decimal) to display of a number. |
6 | Returns the string representation of the number s value. |
7 | Returns the number s value. |
Boolean Methods
Here is a pst of each method and its description.
Sr.No. | Method & Description |
---|---|
1 | Returns a string containing the source of the Boolean object; you can use this string to create an equivalent object. |
2 | Returns a string of either "true" or "false" depending upon the value of the object. |
3 | Returns the primitive value of the Boolean object. |
String Methods
Here is a pst of each method and its description.
Sr.No. | Method & Description |
---|---|
1 | Returns the character at the specified index. |
2 | Returns a number indicating the Unicode value of the character at the given index. |
3 | Combines the text of two strings and returns a new string. |
4 | Returns the index within the calpng String object of the first occurrence of the specified value, or -1 if not found. |
5 | Returns the index within the calpng String object of the last occurrence of the specified value, or -1 if not found. |
6 | Returns a number indicating whether a reference string comes before or after or is the same as the given string in sort order. |
7 | Returns the length of the string. |
8 | Used to match a regular expression against a string. |
9 | Used to find a match between a regular expression and a string, and to replace the matched substring with a new substring. |
10 | Executes the search for a match between a regular expression and a specified string. |
11 | Extracts a section of a string and returns a new string. |
12 | Sppts a String object into an array of strings by separating the string into substrings. |
13 | Returns the characters in a string beginning at the specified location through the specified number of characters. |
14 | Returns the characters in a string between two indexes into the string. |
15 | The characters within a string are converted to lower case while respecting the current locale. |
16 | The characters within a string are converted to upper case while respecting the current locale. |
17 | Returns the calpng string value converted to lower case. |
18 | Returns a string representing the specified object. |
19 | Returns the calpng string value converted to uppercase. |
20 | Returns the primitive value of the specified object. |
String HTML wrappers
Here is a pst of each method which returns a copy of the string wrapped inside the appropriate HTML tag.
Sr.No. | Method & Description |
---|---|
1 | Creates an HTML anchor that is used as a hypertext target. |
2 | Creates a string to be displayed in a big font as if it were in a <big> tag. |
3 | Creates a string to bpnk as if it were in a <bpnk> tag. |
4 | Creates a string to be displayed as bold as if it were in a <b> tag. |
5 | Causes a string to be displayed in fixed-pitch font as if it were in a <tt> tag |
6 | Causes a string to be displayed in the specified color as if it were in a <font color="color"> tag. |
7 | Causes a string to be displayed in the specified font size as if it were in a <font size="size"> tag. |
8 | Causes a string to be itapc, as if it were in an <i> tag. |
9 | Creates an HTML hypertext pnk that requests another URL. |
10 | Causes a string to be displayed in a small font, as if it were in a <small> tag. |
11 | Causes a string to be displayed as struck-out text, as if it were in a <strike> tag. |
12 | Causes a string to be displayed as a subscript, as if it were in a <sub> tag |
13 | Causes a string to be displayed as a superscript, as if it were in a <sup> tag |
Array Methods
Here is a pst of each method and its description.
Sr.No. | Method & Description |
---|---|
1 | Returns a new array comprised of this array joined with other array(s) and/or value(s). |
2 | Returns true if every element in this array satisfies the provided testing function. |
3 | Creates a new array with all of the elements of this array for which the provided filtering function returns true. |
4 | Calls a function for each element in the array. |
5 | Returns the first (least) index of an element within the array equal to the specified value, or -1 if none is found. |
6 | Joins all elements of an array into a string. |
7 | Returns the last (greatest) index of an element within the array equal to the specified value, or -1 if none is found. |
8 | Creates a new array with the results of calpng a provided function on every element in this array. |
9 | Removes the last element from an array and returns that element. |
10 | Adds one or more elements to the end of an array and returns the new length of the array. |
11 | Apply a function simultaneously against two values of the array (from left-to-right) as to reduce it to a single value. |
12 | Apply a function simultaneously against two values of the array (from right-to-left) as to reduce it to a single value. |
13 | Reverses the order of the elements of an array -- the first becomes the last, and the last becomes the first. |
14 | Removes the first element from an array and returns that element. |
15 | Extracts a section of an array and returns a new array. |
16 | Returns true if at least one element in this array satisfies the provided testing function. |
17 | Represents the source code of an object |
18 | Sorts the elements of an array. |
19 | Adds and/or removes elements from an array. |
20 | Returns a string representing the array and its elements. |
21 | Adds one or more elements to the front of an array and returns the new length of the array. |
Date Methods
Here is a pst of each method and its description.
Sr.No. | Method & Description |
---|---|
1 | Returns today s date and time |
2 | Returns the day of the month for the specified date according to local time. |
3 | Returns the day of the week for the specified date according to local time. |
4 | Returns the year of the specified date according to local time. |
5 | Returns the hour in the specified date according to local time. |
6 | Returns the milpseconds in the specified date according to local time. |
7 | Returns the minutes in the specified date according to local time. |
8 | Returns the month in the specified date according to local time. |
9 | Returns the seconds in the specified date according to local time. |
10 | Returns the numeric value of the specified date as the number of milpseconds since January 1, 1970, 00:00:00 UTC. |
11 | Returns the time-zone offset in minutes for the current locale. |
12 | Returns the day (date) of the month in the specified date according to universal time. |
13 | Returns the day of the week in the specified date according to universal time. |
14 | Returns the year in the specified date according to universal time. |
15 | Returns the hours in the specified date according to universal time. |
16 | Returns the milpseconds in the specified date according to universal time. |
17 | Returns the minutes in the specified date according to universal time. |
18 | Returns the month in the specified date according to universal time. |
19 | Returns the seconds in the specified date according to universal time. |
20 | Deprecated - Returns the year in the specified date according to local time. Use getFullYear instead. |
21 | Sets the day of the month for a specified date according to local time. |
22 | Sets the full year for a specified date according to local time. |
23 | Sets the hours for a specified date according to local time. |
24 | Sets the milpseconds for a specified date according to local time. |
25 | Sets the minutes for a specified date according to local time. |
26 | Sets the month for a specified date according to local time. |
27 | Sets the seconds for a specified date according to local time. |
28 | Sets the Date object to the time represented by a number of milpseconds since January 1, 1970, 00:00:00 UTC. |
29 | Sets the day of the month for a specified date according to universal time. |
30 | Sets the full year for a specified date according to universal time. |
31 | Sets the hour for a specified date according to universal time. |
32 | Sets the milpseconds for a specified date according to universal time. |
33 | Sets the minutes for a specified date according to universal time. |
34 | Sets the month for a specified date according to universal time. |
35 | Sets the seconds for a specified date according to universal time. |
36 | Deprecated - Sets the year for a specified date according to local time. Use setFullYear instead. |
37 | Returns the "date" portion of the Date as a human-readable string. |
38 | Deprecated - Converts a date to a string, using the Internet GMT conventions. Use toUTCString instead. |
39 | Returns the "date" portion of the Date as a string, using the current locale s conventions. |
40 | Converts a date to a string, using a format string. |
41 | Converts a date to a string, using the current locale s conventions. |
42 | Returns the "time" portion of the Date as a string, using the current locale s conventions. |
43 | Returns a string representing the source for an equivalent Date object; you can use this value to create a new object. |
44 | Returns a string representing the specified Date object. |
45 | Returns the "time" portion of the Date as a human-readable string. |
46 | Converts a date to a string, using the universal time convention. |
47 | Returns the primitive value of a Date object. |
Date Static Methods
In addition to the many instance methods psted previously, the Date object also defines two static methods. These methods are invoked through the Date( ) constructor itself −
Sr.No. | Method & Description |
---|---|
1 | Parses a string representation of a date and time and returns the internal milpsecond representation of that date. |
2 | Returns the milpsecond representation of the specified UTC date and time. |
Math Methods
Here is a pst of each method and its description.
Sr.No. | Method & Description |
---|---|
1 | Returns the absolute value of a number. |
2 | Returns the arccosine (in radians) of a number. |
3 | Returns the arcsine (in radians) of a number. |
4 | Returns the arctangent (in radians) of a number. |
5 | Returns the arctangent of the quotient of its arguments. |
6 | Returns the smallest integer greater than or equal to a number. |
7 | Returns the cosine of a number. |
8 | Returns EN, where N is the argument, and E is Euler s constant, the base of the natural logarithm. |
9 | Returns the largest integer less than or equal to a number. |
10 | Returns the natural logarithm (base E) of a number. |
11 | Returns the largest of zero or more numbers. |
12 | Returns the smallest of zero or more numbers. |
13 | Returns base to the exponent power, that is, base exponent. |
14 | Returns a pseudo-random number between 0 and 1. |
15 | Returns the value of a number rounded to the nearest integer. |
16 | Returns the sine of a number. |
17 | Returns the square root of a number. |
18 | Returns the tangent of a number. |
19 | Returns the string "Math". |
RegExp Methods
Here is a pst of each method and its description.
Sr.No. | Method & Description |
---|---|
1 | Executes a search for a match in its string parameter. |
2 | Tests for a match in its string parameter. |
3 | Returns an object pteral representing the specified object; you can use this value to create a new object. |
4 | Returns a string representing the specified object. |