react-style-stringify/dist/index.mjs

A utility for converting React CSSProperties and style maps into CSS strings, designed to simplify the management of inline styles in HTML email templates and React projects.

// src/helpers.ts
import unitless from "@emotion/unitless";
var DEFAULT_UNIT = "px";
var isCSSPropertyValue = (value) => typeof value === "number" || typeof value === "string";
function camelToKebab(str) {
  return str.replace(/[A-Z]/g, (match) => `-${match.toLowerCase()}`);
}
function trimCssSelector(selector) {
  return selector.replace(/\s*([+~>])\s*/g, "$1").replace(/\s{2,}/g, " ").trim();
}
function applyCssUnits(property, value, unit = DEFAULT_UNIT) {
  if (typeof value !== "string" && typeof value !== "number") {
    throw new Error(
      "Invalid input: value of 'cssProperties' must be string or number."
    );
  }
  const isUnitless = unitless[property] === 1;
  if (typeof value === "string" || value === 0 || isUnitless) {
    return `${value}`;
  }
  const resolvedUnit = (typeof unit === "string" ? unit : unit[property]) || DEFAULT_UNIT;
  return `${value}${resolvedUnit}`;
}

// src/stringifyStyleDeclaration.ts
function stringifyStyleDeclaration(styleDeclaration, options) {
  if (typeof styleDeclaration !== "object" || styleDeclaration === null) {
    throw new TypeError(
      `[stringifyStyleDeclaration]: Expected 'styleDeclaration' to be a non-null object, but received ${styleDeclaration} (type:${typeof styleDeclaration}).`
    );
  }
  const importantSuffix = options?.important ? "!important" : "";
  return Object.entries(styleDeclaration).filter(([_, value]) => isCSSPropertyValue(value)).map(
    ([property, value]) => `${camelToKebab(property)}:${applyCssUnits(
      property,
      value,
      options?.unit
    )}${importantSuffix};`
  ).join("");
}

// src/stringifyStyleRule.ts
function stringifyStyleRule(styleRule, options) {
  if (typeof styleRule !== "object" || styleRule === null) {
    throw new TypeError(
      `[stringifyStyleRule]: Expected 'styleRule' to be a non-null object, but received ${styleRule} (type:${typeof styleRule}).`
    );
  }
  return Object.entries(styleRule).reduce((result, [selector, declaration]) => {
    if (Object.keys(declaration).length > 0) {
      result.push(
        `${trimCssSelector(selector)}{${stringifyStyleDeclaration(
          declaration,
          options
        )}}`
      );
    }
    return result;
  }, []).join("");
}

// src/stringify-react-styles.ts
function stringifyCSSProperties(cssProperties, optionsOrImportant = false) {
  if (typeof cssProperties !== "object" || cssProperties === null) {
    throw new TypeError(
      `[stringifyCSSProperties]: Expected 'cssProperties' to be a non-null object, but received ${cssProperties} (type:${typeof cssProperties}).`
    );
  }
  const options = typeof optionsOrImportant === "boolean" ? {
    important: optionsOrImportant
  } : optionsOrImportant;
  return stringifyStyleDeclaration(cssProperties, options);
}
function stringifyStyleMap(styleMap, optionsOrImportant = false) {
  if (typeof styleMap !== "object" || styleMap === null) {
    throw new TypeError(
      `[stringifyStyleMap]: Expected 'styleMap' to be a non-null object, but received ${styleMap} (type:${typeof styleMap}).`
    );
  }
  const options = typeof optionsOrImportant === "boolean" ? {
    important: optionsOrImportant
  } : optionsOrImportant;
  return stringifyStyleRule(styleMap, options);
}
export {
  stringifyCSSProperties,
  stringifyStyleDeclaration,
  stringifyStyleMap,
  stringifyStyleRule
};
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