Javascript Cheatsheet

Global

Properties: Infinity; NaN; undefined
Methods: eval(string [, object]); isFinite(number); isNaN(number); parseFloat(string); parseInt(string); encodeURI(string); decodeURI(string); encodeURIComponent(string); decodeURIComponent(string)

Constructors: new Array(length); new Array(el0, el1, ...); [el0, el1, ...]
Properties: length
Methods (mutators): pop(); push(el0, el1, ...); reverse(); shift(); splice(index, count [, el0, el1, ...]); unshift()
Methods (accessors): concat(add0, add1, ...); join(separator); slice(begin [, end])

Constructors: new Date(milliseconds); new Date(string); new Date(yr_num, mo_num, day_num [, hr_num, min_num, sec_num, ms_num])
Methods (static): Date.now(); Date.parse(string); Date.UTC(yr_num, mo_num [, day_num hr_num, min_num, sec_num, ms_num])
Methods: getDate(); getDay(); getFullYear(); getMilliseconds(); getMinutes(); getMonth() // zero-based; getSeconds(); getTime(); getTimezoneOffset(); setDate(month_day); setFullYear(year); setMilliseconds( millisec ); setMinutes(minutes); setMonth(month) // zero-based; setSeconds(seconds); setTime(timestamp)
Operators: date1 - date2 // time in milliseconds
More: Date object reference

Properties: E // Euler's constant, ~ 2.718; LN2 // Natural logarithm of 2, ~ 0.693.; LN10 // Natural logarithm of 10, ~ 2.302; LOG2E // Base 2 logarithm of E, ~ 1.442; LOG10E // Base 10 logarithm of E, ~ 0.434; PI // ~ 3.14159; SQRT1_2 // sqrt(1/2) or 1/sqrt(2), ~ 0.707; SQRT2: Square root of 2, ~ 1.414
Methods (static): abs(number); acos(number) // Return radians; asin(number) // Return radians; atan(number) // Return radians; atan2(number) // Return radians; ceil(number); exp(number); floor(number); log(number); max([n1, n2, ...]); min([n1, n2, ...]); pow(base, exponent); random(); round(number); sin(number); sqrt(number); tan(number) // Take radians

Constructors: new Number(value); number
Properties: MAX_VALUE; MIN_VALUE; NaN; NEGATIVE_INFINITY; POSITIVE_INFINITY
Methods: toExponential( [fraction_digits] ); toFixed([digits]); toLocaleString(); toPrecision([precision])

Constructors: new RegExp(pattern [, flags]); /pattern/flags
Properties: global; ignoreCase; lastIndex; multiline; source
Methods: exec(string): {index: number, input: string, 0: matched, 1: paran1, ...}; test(string)

Constructors: new String(string); "string"
Properties: length
Methods (static): String.fromCharCode( array )
Methods: charAt(index); charCodeAt(index); concat(string1, ...); indexOf(string [, fromIndex]) // -1 on failure; lastIndexOf(string [, fromIndex]) // -1 on failure; match(regexp); replace(regexp|substr, new_substr|function); search(regexp) // -1 on failure; slice(start [, end]); split(by_string [, limit]); substr(start [, length]); substring(start [, end]); toLowerCase(); toUpperCase()
More: String object reference

Constructors: new XMLHttpRequest()
Properties: onerror; onload; onprogress; onreadystatechange; readyState; responseText; responseXML; status
Methods: open(method, URL, synchronous); send(data); overrideMimeType(data); setRequestHeader(header, value); getResponseHeader(header); send(data)
Progress event properties: position; totalSize