JS Reference

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alignContent alignItems alignSelf animation animationDelay animationDirection animationDuration animationFillMode animationIterationCount animationName animationTimingFunction animationPlayState background backgroundAttachment backgroundClip backgroundColor backgroundImage backgroundOrigin backgroundPosition backgroundRepeat backgroundSize backfaceVisibility border borderBottom borderBottomColor borderBottomLeftRadius borderBottomRightRadius borderBottomStyle borderBottomWidth borderCollapse borderColor borderImage borderImageOutset borderImageRepeat borderImageSlice borderImageSource borderImageWidth borderLeft borderLeftColor borderLeftStyle borderLeftWidth borderRadius borderRight borderRightColor borderRightStyle borderRightWidth borderSpacing borderStyle borderTop borderTopColor borderTopLeftRadius borderTopRightRadius borderTopStyle borderTopWidth borderWidth bottom boxShadow boxSizing captionSide caretColor clear clip color columnCount columnFill columnGap columnRule columnRuleColor columnRuleStyle columnRuleWidth columns columnSpan columnWidth counterIncrement counterReset cssFloat cursor direction display emptyCells filter flex flexBasis flexDirection flexFlow flexGrow flexShrink flexWrap font fontFamily fontSize fontStyle fontVariant fontWeight fontSizeAdjust height isolation justifyContent left letterSpacing lineHeight listStyle listStyleImage listStylePosition listStyleType margin marginBottom marginLeft marginRight marginTop maxHeight maxWidth minHeight minWidth objectFit objectPosition opacity order orphans outline outlineColor outlineOffset outlineStyle outlineWidth overflow overflowX overflowY padding paddingBottom paddingLeft paddingRight paddingTop pageBreakAfter pageBreakBefore pageBreakInside perspective perspectiveOrigin position quotes resize right scrollBehavior tableLayout tabSize textAlign textAlignLast textDecoration textDecorationColor textDecorationLine textDecorationStyle textIndent textOverflow textShadow textTransform top transform transformOrigin transformStyle transition transitionProperty transitionDuration transitionTimingFunction transitionDelay unicodeBidi userSelect verticalAlign visibility width wordBreak wordSpacing wordWrap widows zIndex

HTML Events

HTML Events HTML Event Objects HTML Event Properties HTML Event Methods

Web APIs

API Canvas API Console API Fetch API Fullscreen API Geolocation API History API MediaQueryList API Storage API Validation API Web

HTML Objects

<a> <abbr> <address> <area> <article> <aside> <audio> <b> <base> <bdo> <blockquote> <body> <br> <button> <canvas> <caption> <cite> <code> <col> <colgroup> <datalist> <dd> <del> <details> <dfn> <dialog> <div> <dl> <dt> <em> <embed> <fieldset> <figcaption> <figure> <footer> <form> <head> <header> <h1> - <h6> <hr> <html> <i> <iframe> <img> <ins> <input> button <input> checkbox <input> color <input> date <input> datetime <input> datetime-local <input> email <input> file <input> hidden <input> image <input> month <input> number <input> password <input> radio <input> range <input> reset <input> search <input> submit <input> text <input> time <input> url <input> week <kbd> <label> <legend> <li> <link> <map> <mark> <menu> <menuitem> <meta> <meter> <nav> <object> <ol> <optgroup> <option> <output> <p> <param> <pre> <progress> <q> <s> <samp> <script> <section> <select> <small> <source> <span> <strong> <style> <sub> <summary> <sup> <table> <tbody> <td> <tfoot> <th> <thead> <tr> <textarea> <time> <title> <track> <u> <ul> <var> <video>

Other References

CSSStyleDeclaration JS Conversion

JavaScript String Reference

JavaScript Strings

A JavaScript string stores a series of characters like "John Doe".

A string can be any text inside double or single quotes:

let carName1 = "Volvo XC60";
let carName2 = 'Volvo XC60';
Try it Yourself »

String indexes are zero-based:

The first character is in position 0, the second in 1, and so on.

For a tutorial about Strings, read our JavaScript String Tutorial.

String Properties and Methods

Normally, strings like "John Doe", cannot have methods or properties because they are not objects.

But with JavaScript, methods and properties are also available to strings, because JavaScript treats strings as objects when executing methods and properties.

JavaScript String Methods

Name Description
at() Returns an indexed character from a string
charAt() Returns the character at a specified index (position)
charCodeAt() Returns the Unicode of the character at a specified index
codePointAt() Returns the Unicode value at an index (position) in a string
concat() Returns two or more joined strings
constructor Returns the string's constructor function
endsWith() Returns if a string ends with a specified value
fromCharCode() Returns Unicode values as characters
includes() Returns if a string contains a specified value
indexOf() Returns the index (position) of the first occurrence of a value in a string
lastIndexOf() Returns the index (position) of the last occurrence of a value in a string
length Returns the length of a string
localeCompare() Compares two strings in the current locale
match() Searches a string for a value, or a regular expression, and returns the matches
padEnd() Pads a string at the end
padStart() Pads a string from the start
prototype Allows you to add properties and methods to an object
repeat() Returns a new string with a number of copies of a string
replace() Searches a string for a pattern, and returns a string where the first match is replaced
replaceAll() Searches a string for a pattern and returns a new string where all matches are replaced
search() Searches a string for a value, or regular expression, and returns the index (position) of the match
slice() Extracts a part of a string and returns a new string
split() Splits a string into an array of substrings
startsWith() Checks whether a string begins with specified characters
substr() Extracts a number of characters from a string, from a start index (position)
substring() Extracts characters from a string, between two specified indices (positions)
toLocaleLowerCase() Returns a string converted to lowercase letters, using the host's locale
toLocaleUpperCase() Returns a string converted to uppercase letters, using the host's locale
toLowerCase() Returns a string converted to lowercase letters
toString() Returns a string or a string object as a string
toUpperCase() Returns a string converted to uppercase letters
trim() Returns a string with removed whitespaces
trimEnd() Returns a string with removed whitespaces from the end
trimStart() Returns a string with removed whitespaces from the start
valueOf() Returns the primitive value of a string or a string object


All string methods return a new value.

They do not change the original variable.

String HTML Wrapper Methods

HTML wrapper methods return a string wrapped inside an HTML tag.

These are not standard methods, and may not work as expected.

Method Description
anchor() Displays a string as an anchor
big() Displays a string using a big font
blink() Displays a blinking string
bold() Displays a string in bold
fixed() Displays a string using a fixed-pitch font
fontcolor() Displays a string using a specified color
fontsize() Displays a string using a specified size
italics() Displays a string in italic
link() Displays a string as a hyperlink
small() Displays a string using a small font
strike() Displays a string with a strikethrough
sub() Displays a string as subscript text
sup() Displays a string as superscript text


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