Many classes have shortcut names used when creating (instantiating) a class with a
configuration object. The shortcut name is referred to as an alias (or xtype if the
class extends Ext.Component). The alias/xtype is listed next to the class name of
applicable classes for quick reference.
Framework classes or their members may be specified as private or protected. Else,
the class / member is public. Public, protected, and private are access
descriptors used to convey how and when the class or class member should be used.
Public classes and class members are available for use by any other class or application code and may be relied upon as a stable and persistent within major product versions. Public classes and members may safely be extended via a subclass.
Protected class members are stable public members intended to be used by the
owning class or its subclasses. Protected members may safely be extended via a subclass.
Private classes and class members are used internally by the framework and are not intended to be used by application developers. Private classes and members may change or be omitted from the framework at any time without notice and should not be relied upon in application logic.
static label next to the
method name. *See Static below.Below is an example class member that we can disect to show the syntax of a class member (the lookupComponent method as viewed from the Ext.button.Button class in this case).
Let's look at each part of the member row:
lookupComponent in this example)( item ) in this example)Ext.Component in this case). This may be omitted for methods that do not
return anything other than undefined or may display as multiple possible values
separated by a forward slash / signifying that what is returned may depend on the
results of the method call (i.e. a method may return a Component if a get method calls is
successful or false if unsuccessful which would be displayed as
Ext.Component/Boolean).PROTECTED in
this example - see the Flags section below)Ext.container.Container in this example). The source
class will be displayed as a blue link if the member originates from the current class
and gray if it is inherited from an ancestor or mixed-in class.view source in the example)item : Object in the example).undefined a "Returns" section
will note the type of class or object returned and a description (Ext.Component in the
example)Available since 3.4.0 - not pictured in
the example) just after the member descriptionDefaults to: false)The API documentation uses a number of flags to further commnicate the class member's function and intent. The label may be represented by a text label, an abbreviation, or an icon.
classInstance.method1().method2().etc();false is returned from
an event handler- Indicates a framework class
- A singleton framework class. *See the singleton flag for more information
- A component-type framework class (any class within the Ext JS framework that extends Ext.Component)
- Indicates that the class, member, or guide is new in the currently viewed version
- Indicates a class member of type config
- Indicates a class member of type property
- Indicates a class member of type
method
- Indicates a class member of type event
- Indicates a class member of type
theme variable
- Indicates a class member of type
theme mixin
- Indicates that the class, member, or guide is new in the currently viewed version
Just below the class name on an API doc page is a row of buttons corresponding to the types of members owned by the current class. Each button shows a count of members by type (this count is updated as filters are applied). Clicking the button will navigate you to that member section. Hovering over the member-type button will reveal a popup menu of all members of that type for quick navigation.
Getting and setter methods that correlate to a class config option will show up in the methods section as well as in the configs section of both the API doc and the member-type menus just beneath the config they work with. The getter and setter method documentation will be found in the config row for easy reference.
Your page history is kept in localstorage and displayed (using the available real estate) just below the top title bar. By default, the only search results shown are the pages matching the product / version you're currently viewing. You can expand what is displayed by clicking on the button on the right-hand side of the history bar and choosing the "All" radio option. This will show all recent pages in the history bar for all products / versions.
Within the history config menu you will also see a listing of your recent page visits. The results are filtered by the "Current Product / Version" and "All" radio options. Clicking on the button will clear the history bar as well as the history kept in local storage.
If "All" is selected in the history config menu the checkbox option for "Show product details in the history bar" will be enabled. When checked, the product/version for each historic page will show alongside the page name in the history bar. Hovering the cursor over the page names in the history bar will also show the product/version as a tooltip.
Both API docs and guides can be searched for using the search field at the top of the page.
On API doc pages there is also a filter input field that filters the member rows using the filter string. In addition to filtering by string you can filter the class members by access level, inheritance, and read only. This is done using the checkboxes at the top of the page.
The checkbox at the bottom of the API class navigation tree filters the class list to include or exclude private classes.
Clicking on an empty search field will show your last 10 searches for quick navigation.
Each API doc page (with the exception of Javascript primitives pages) has a menu view of metadata relating to that class. This metadata view will have one or more of the following:
Ext.button.Button class has an alternate class name of Ext.Button). Alternate class
names are commonly maintained for backward compatibility.Runnable examples (Fiddles) are expanded on a page by default. You can collapse and expand example code blocks individually using the arrow on the top-left of the code block. You can also toggle the collapse state of all examples using the toggle button on the top-right of the page. The toggle-all state will be remembered between page loads.
Class members are collapsed on a page by default. You can expand and collapse members using the arrow icon on the left of the member row or globally using the expand / collapse all toggle button top-right.
Viewing the docs on narrower screens or browsers will result in a view optimized for a smaller form factor. The primary differences between the desktop and "mobile" view are:
The class source can be viewed by clicking on the class name at the top of an API doc page. The source for class members can be viewed by clicking on the "view source" link on the right-hand side of the member row.
Creates a regular expression object for matching text according to a pattern.
When using the constructor function, the normal string escape rules (preceding special characters with \ when included in a string) are necessary. For example, the following are equivalent:
var re = new RegExp("\\w+");
var re = /\w+/;
Notice that the parameters to the literal format do not use quotation marks to indicate strings, while the parameters to the constructor function do use quotation marks. So the following expressions create the same regular expression:
/ab+c/i;
new RegExp("ab+c", "i");
| Character | Meaning | |
|---|---|---|
\ |
For characters that are usually treated literally, indicates that the next character | |
| is special and not to be interpreted literally. | ||
For example, /b/ matches the character 'b'. By placing a backslash in front of b, that |
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is by using /\b/, the character becomes special to mean match a word boundary. |
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| or | ||
| For characters that are usually treated specially, indicates that the next character is | ||
| not special and should be interpreted literally. | ||
For example, * is a special character that means 0 or more occurrences of the preceding |
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character should be matched; for example, /a*\/ means match 0 or more "a"s. To match * |
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literally, precede it with a backslash; for example, /a\*\/ matches 'a*'. |
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^ |
Matches beginning of input. If the multiline flag is set to true, also matches | |
| immediately after a line break character. | ||
For example, /^A/ does not match the 'A' in "an A", but does match the first 'A' in |
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| "An A". | ||
$ |
Matches end of input. If the multiline flag is set to true, also matches immediately | |
| before a line break character. | ||
For example, /t$/ does not match the 't' in "eater", but does match it in "eat". |
||
* |
Matches the preceding item 0 or more times. | |
For example, /bo*\/ matches 'boooo' in "A ghost booooed" and 'b' in "A bird warbled", |
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| but nothing in "A goat grunted". | ||
+ |
Matches the preceding item 1 or more times. Equivalent to {1,}. |
|
For example, /a+/ matches the 'a' in "candy" and all the a's in "caaaaaaandy". |
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? |
Matches the preceding item 0 or 1 time. | |
For example, /e?le?/ matches the 'el' in "angel" and the 'le' in "angle." |
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If used immediately after any of the quantifiers *, +, ?, or {}, makes the quantifier |
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| non-greedy (matching the minimum number of times), as opposed to the default, which is | ||
| greedy (matching the maximum number of times). | ||
Also used in lookahead assertions, described under (?=), (?!), and (?:) in this table. |
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. |
(The decimal point) matches any single character except the newline characters: \n \r | |
\u2028 or \u2029. ([\s\S] can be used to match any character including new lines.) |
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For example, /.n/ matches 'an' and 'on' in "nay, an apple is on the tree", but not 'nay'. |
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(x) |
Matches x and remembers the match. These are called capturing parentheses. |
|
For example, /(foo)/ matches and remembers 'foo' in "foo bar." The matched substring can |
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be recalled from the resulting array's elements [1], ..., [n] or from the predefined RegExp |
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object's properties $1, ..., $9. |
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(?:x) |
Matches x but does not remember the match. These are called non-capturing parentheses. |
|
The matched substring can not be recalled from the resulting array's elements [1], ..., [n] |
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or from the predefined RegExp object's properties $1, ..., $9. |
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x(?=y) |
Matches x only if x is followed by y. For example, /Jack(?=Sprat)/ matches 'Jack' only if |
|
| it is followed by 'Sprat'. `/Jack(?=Sprat | Frost)/` matches 'Jack' only if it is followed by | |
| 'Sprat' or 'Frost'. However, neither 'Sprat' nor 'Frost' is part of the match results. | ||
x(?!y) |
Matches x only if x is not followed by y. For example, /\d+(?!\.)/ matches a number only |
|
| if it is not followed by a decimal point. | ||
/\d+(?!\.)/.exec("3.141") matches 141 but not 3.141. |
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x|y |
Matches either x or y. |
|
| For example, `/green | red/` matches 'green' in "green apple" and 'red' in "red apple." | |
{n} |
Where n is a positive integer. Matches exactly n occurrences of the preceding item. |
|
For example, /a{2}/ doesn't match the 'a' in "candy," but it matches all of the a's |
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| in "caandy," and the first two a's in "caaandy." | ||
{n,} |
Where n is a positive integer. Matches at least n occurrences of the preceding item. |
|
For example, /a{2,}/ doesn't match the 'a' in "candy", but matches all of the a's in |
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| "caandy" and in "caaaaaaandy." | ||
{n,m} |
Where n and m are positive integers. Matches at least n and at most m occurrences of the |
|
| preceding item. | ||
For example, /a{1,3}/ matches nothing in "cndy", the 'a' in "candy," the first two a's |
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| in "caandy," and the first three a's in "caaaaaaandy". Notice that when matching | ||
| "caaaaaaandy", the match is "aaa", even though the original string had more a's in it. | ||
[xyz] |
A character set. Matches any one of the enclosed characters. You can specify a range of | |
| characters by using a hyphen. | ||
For example, [abcd] is the same as [a-d]. They match the 'b' in "brisket" and the 'c' |
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| in "chop". | ||
[^xyz] |
A negated or complemented character set. That is, it matches anything that is not | |
| enclosed in the brackets. You can specify a range of characters by using a hyphen. | ||
For example, [^abc] is the same as [^a-c]. They initially match 'r' in "brisket" and |
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| 'h' in "chop." | ||
[\b] |
Matches a backspace. (Not to be confused with \b.) |
|
\b |
Matches a word boundary, such as a space. (Not to be confused with [\b].) |
|
For example, /\bn\w/ matches the 'no' in "noonday"; /\wy\b/ matches the 'ly' in |
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| "possibly yesterday." | ||
\B |
Matches a non-word boundary. | |
For example, /\w\Bn/ matches 'on' in "noonday", and /y\B\w/ matches 'ye' in "possibly |
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| yesterday." | ||
\cX |
Where X is a letter from A - Z. Matches a control character in a string. | |
For example, /\cM/ matches control-M in a string. |
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\d |
Matches a digit character in the basic Latin alphabet. Equivalent to [0-9]. |
|
For example, /\d/ or /[0-9]/ matches '2' in "B2 is the suite number." |
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\D |
Matches any non-digit character in the basic Latin alphabet. Equivalent to [^0-9]. |
|
For example, /\D/ or /[^0-9]/ matches 'B' in "B2 is the suite number. |
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\f |
Matches a form-feed. | |
\n |
Matches a linefeed. | |
\r |
Matches a carriage return. | |
\s |
Matches a single white space character, including space, tab, form feed, line feed and | |
| other unicode spaces. Equivalent to: | ||
[\t\n\v\f\r \u00a0\u2000\u2001\u2002\u2003\u2004\u2005\u2006\u2007\u2008\u2009\u200a\u200b\u2028\u2029\u3000] |
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For example, /\s\w*\/ matches ' bar' in "foo bar." |
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\S |
Matches a single character other than white space. Equivalent to: | |
[^\t\n\v\f\r \u00a0\u2000\u2001\u2002\u2003\u2004\u2005\u2006\u2007\u2008\u2009\u200a\u200b\u2028\u2029\u3000] |
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For example, /\S\w*\/ matches 'foo' in "foo bar." |
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\t |
Matches a tab. | |
\v |
Matches a vertical tab. | |
\w |
Matches any alphanumeric character from the basic Latin alphabet, including the | |
underscore. Equivalent to [A-Za-z0-9_]. |
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For example, /\w/ matches 'a' in "apple," '5' in "$5.28," and '3' in "3D." |
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\W |
Matches any character that is not a word character from the basic Latin alphabet. Equivalent | |
to [^A-Za-z0-9_]. |
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For example, /\W/ or /[^A-Za-z0-9_]/ matches '%' in "50%." |
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\n |
Where n is a positive integer. A back reference to the last substring matching the n |
|
| parenthetical in the regular expression (counting left parentheses). | ||
For example, /apple(,)\sorange\1/ matches 'apple, orange,' in "apple, orange, cherry, |
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| peach." A more complete example follows this table. | ||
\0 |
Matches a NULL character. Do not follow this with another digit. | |
\xhh |
Matches the character with the code hh (two hexadecimal digits) |
|
\uhhhh |
Matches the character with the Unicode value hhhh (four hexadecimal digits) |
The literal notation provides compilation of the regular expression when the expression is evaluated. Use literal notation when the regular expression will remain constant. For example, if you use literal notation to construct a regular expression used in a loop, the regular expression won't be recompiled on each iteration.
The constructor of the regular expression object, for example, new RegExp("ab+c"), provides runtime compilation of the regular expression. Use the constructor function when you know the regular expression pattern will be changing, or you don't know the pattern and are getting it from another source, such as user input.
Whether to test the regular expression against all possible matches in a string, or only against the first.
global is a property of an individual regular expression object.
The value of global is true if the "g" flag was used; otherwise, false. The "g" flag
indicates that the regular expression should be tested against all possible matches in a string.
You cannot change this property directly.
Whether to ignore case while attempting a match in a string.
ignoreCase is a property of an individual regular expression object.
The value of ignoreCase is true if the "i" flag was used; otherwise, false. The "i" flag indicates
that case should be ignored while attempting a match in a string.
You cannot change this property directly.
The index at which to start the next match. A read/write integer property that specifies the index at which to start the next match.
lastIndex is a property of an individual regular expression object.
This property is set only if the regular expression used the "g" flag to indicate a global search.
The following rules apply:
lastIndex is greater than the length of the string, regexp.test and regexp.exec fail,
and lastIndex is set to 0.lastIndex is equal to the length of the string and if the regular expression matches the
empty string, then the regular expression matches input starting at lastIndex.lastIndex is equal to the length of the string and if the regular expression does not match
the empty string, then the regular expression mismatches input, and lastIndex is reset to 0.lastIndex is set to the next position following the most recent match.For example, consider the following sequence of statements:
Whether or not to search in strings across multiple lines.
multiline is a property of an individual regular expression object..
The value of multiline is true if the "m" flag was used; otherwise, false. The "m" flag
indicates that a multiline input string should be treated as multiple lines. For example, if "m"
is used, "^" and "$" change from matching at only the start or end of the entire string to the
start or end of any line within the string.
You cannot change this property directly.
Creates new regular expression object.
pattern : String
The text of the regular expression.
flags : String
If specified, flags can have any combination of the following values:
Executes a search for a match in its string parameter.
If the match succeeds, the exec method returns an array and updates properties of the regular
expression object. The returned array has the matched text as the first item, and then one item for
each capturing parenthesis that matched containing the text that was captured. If the match fails,
the exec method returns null.
If you are executing a match simply to find true or false, use the test method or the String
search method.
Consider the following example:
// Match one d followed by one or more b's followed by one d
// Remember matched b's and the following d
// Ignore case
var re = /d(b+)(d)/ig;
var result = re.exec("cdbBdbsbz");
The following table shows the results for this script:
| Object | Property/Index | Description | Example |
|---|---|---|---|
result |
The content of myArray. | ["dbBd", "bB", "d"] |
|
index |
The 0-based index of the match in the string | 1 |
|
input |
The original string. | cdbDdbsbz |
|
[0] |
The last matched characters. | dbBd |
|
[1], ...[n] |
The parenthesized substring matches, if any. The number of possible | [1] = bB |
|
| parenthesized substrings is unlimited. | [2] = d |
||
re |
lastIndex |
The index at which to start the next match. | 5 |
ignoreCase |
Indicates the "i" flag was used to ignore case. |
true |
|
global |
Indicates the "g" flag was used for a global match. |
true |
|
multiline |
Indicates the "m" flag was used to search in strings across |
false |
|
| multiple lines. | |||
source |
The text of the pattern. | d(b+)(d) |
If your regular expression uses the "g" flag, you can use the exec method multiple times to find
successive matches in the same string. When you do so, the search starts at the substring of str
specified by the regular expression's lastIndex property (test will also advance the lastIndex
property). For example, assume you have this script:
var myRe = /ab*\/g;
var str = "abbcdefabh";
var myArray;
while ((myArray = myRe.exec(str)) != null)
{
var msg = "Found " + myArray[0] + ". ";
msg += "Next match starts at " + myRe.lastIndex;
print(msg);
}
This script displays the following text:
Found abb. Next match starts at 3
Found ab. Next match starts at 9
You can also use exec() without creating a RegExp object:
var matches = /(hello \S+)/.exec('This is a hello world!');
alert(matches[1]);
This will display an alert containing 'hello world!';
str : String
The string against which to match the regular expression.
Array of results or NULL.
Tests for a match in its string parameter.
When you want to know whether a pattern is found in a string use the test method (similar to the
String.search method); for more information (but slower execution) use the exec method (similar to
the String.match method). As with exec (or in combination with it), test called multiple times on
the same global regular expression instance will advance past the previous match.
The following example prints a message which depends on the success of the test:
function testinput(re, str){
if (re.test(str))
midstring = " contains ";
else
midstring = " does not contain ";
document.write (str + midstring + re.source);
}
str : String
The string against which to match the regular expression.
true if string contains any matches, otherwise returns false.
Returns a string representing the specified object. Overrides the Object.prototype.toString
method.
The RegExp object overrides the toString method of the Object object; it does not inherit
Object.toString. For RegExp objects, the toString method returns a string representation of the
regular expression.
The following example displays the string value of a RegExp object:
myExp = new RegExp("a+b+c");
alert(myExp.toString()); // displays "/a+b+c/"
Regular expression as a string.
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