gatsby-background-image/lib/SimpleUtils.js

Lazy-loading React background-image component with optional support for the blur-up effect.

"use strict";

exports.__esModule = true;
exports.toKebabCase = exports.toCamelCase = exports.stringToArray = exports.isString = exports.isObject = exports.isBrowser = exports.hashString = exports.filteredJoin = exports.combineArray = exports.capitalize = void 0;

var isBrowser = function isBrowser() {
  return typeof window !== "undefined" && typeof window.document !== "undefined";
};

exports.isBrowser = isBrowser;

var isString = function isString(value) {
  return Object.prototype.toString.call(value) === '[object String]';
};

exports.isString = isString;

var isObject = function isObject(value) {
  return Object.prototype.toString.call(value) === '[object Object]';
};

exports.isObject = isObject;

var toCamelCase = function toCamelCase(str) {
  return isString(str) && str.indexOf('-') !== -1 && str.toLowerCase().replace(/(?:^\w|-|[A-Z]|\b\w)/g, function (letter, index) {
    return index === 0 ? letter.toLowerCase() : letter.toUpperCase();
  }).replace(/\s|\W+/g, '') || str;
};

exports.toCamelCase = toCamelCase;

var toKebabCase = function toKebabCase(str) {
  return isString(str) && str.replace(/\s|\W+/g, '').replace(/[A-Z]/g, function (match) {
    return "-" + match.toLowerCase();
  });
};

exports.toKebabCase = toKebabCase;

var capitalize = function capitalize(str) {
  return (str === null || str === void 0 ? void 0 : str.charAt(0).toUpperCase()) + str.slice(1);
};

exports.capitalize = capitalize;

var stringToArray = function stringToArray(str, delimiter) {
  if (delimiter === void 0) {
    delimiter = " ";
  }

  if (str instanceof Array) {
    return str;
  }

  if (isString(str)) {
    if (str.includes(delimiter)) {
      return str.split(delimiter);
    }

    return [str];
  }

  return false;
};

exports.stringToArray = stringToArray;

var hashString = function hashString(str) {
  return isString(str) && [].reduce.call(str, function (hash, item) {
    hash = (hash << 5) - hash + item.charCodeAt(0);
    return hash | 0;
  }, 0);
};

exports.hashString = hashString;

var filteredJoin = function filteredJoin(arrayToJoin) {
  return arrayToJoin.filter(function (item) {
    return item !== "";
  }).join();
};

exports.filteredJoin = filteredJoin;

var combineArray = function combineArray(fromArray, toArray) {
  if (!Array.isArray(fromArray)) {
    return [fromArray];
  }

  return fromArray.map(function (item, index) {
    return item || toArray && toArray[index];
  });
};

exports.combineArray = combineArray;