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// Parse unit value
export const numberAndUnit = /^([+-]?(\d+(\.\d*)?|\.\d+)(e[+-]?\d+)?)([a-z%]*)$/i
// Parse hex value
export const hex = /^#?([a-f\d]{2})([a-f\d]{2})([a-f\d]{2})$/i
// Parse rgb value
export const rgb = /rgb\((\d+),(\d+),(\d+)\)/
// Parse reference id
export const reference = /(#[a-z0-9\-_]+)/i
// splits a transformation chain
export const transforms = /\)\s*,?\s*/
// Whitespace
export const whitespace = /\s/g
// Test hex value
export const isHex = /^#[a-f0-9]{3,6}$/i
// Test rgb value
export const isRgb = /^rgb\(/
// Test css declaration
export const isCss = /[^:]+:[^;]+;?/
// Test for blank string
export const isBlank = /^(\s+)?$/
// Test for numeric string
export const isNumber = /^[+-]?(\d+(\.\d*)?|\.\d+)(e[+-]?\d+)?$/i
// Test for percent value
export const isPercent = /^-?[\d.]+%$/
// Test for image url
export const isImage = /\.(jpg|jpeg|png|gif|svg)(\?[^=]+.*)?/i
// split at whitespace and comma
export const delimiter = /[\s,]+/
// The following regex are used to parse the d attribute of a path
// Matches all hyphens which are not after an exponent
export const hyphen = /([^e])-/gi
// Replaces and tests for all path letters
export const pathLetters = /[MLHVCSQTAZ]/gi
// yes we need this one, too
export const isPathLetter = /[MLHVCSQTAZ]/i
// matches 0.154.23.45
export const numbersWithDots = /((\d?\.\d+(?:e[+-]?\d+)?)((?:\.\d+(?:e[+-]?\d+)?)+))+/gi
// matches .
export const dots = /\./g
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