react-native-typewriter-effect/lib/commonjs/index.js

Typing animation library for React Native

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = TypeWriterEffect;
var _react = _interopRequireWildcard(require("react"));
var _reactNative = require("react-native");
function _getRequireWildcardCache(nodeInterop) { if (typeof WeakMap !== "function") return null; var cacheBabelInterop = new WeakMap(); var cacheNodeInterop = new WeakMap(); return (_getRequireWildcardCache = function (nodeInterop) { return nodeInterop ? cacheNodeInterop : cacheBabelInterop; })(nodeInterop); }
function _interopRequireWildcard(obj, nodeInterop) { if (!nodeInterop && obj && obj.__esModule) { return obj; } if (obj === null || typeof obj !== "object" && typeof obj !== "function") { return { default: obj }; } var cache = _getRequireWildcardCache(nodeInterop); if (cache && cache.has(obj)) { return cache.get(obj); } var newObj = {}; var hasPropertyDescriptor = Object.defineProperty && Object.getOwnPropertyDescriptor; for (var key in obj) { if (key !== "default" && Object.prototype.hasOwnProperty.call(obj, key)) { var desc = hasPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : null; if (desc && (desc.get || desc.set)) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } newObj.default = obj; if (cache) { cache.set(obj, newObj); } return newObj; }
const DEFAULT_MAX_DELAY = 100;
const DEFAULT_MIN_DELAY = 10;
function TypeWriterEffect(props) {
  const {
    content,
    onTyped,
    onTypingEnd,
    minDelay = DEFAULT_MIN_DELAY,
    maxDelay = DEFAULT_MAX_DELAY,
    vibration = true,
    backspaceEffect = false
  } = props;
  const initialIndex = backspaceEffect ? content.length : 0;
  const [currentCharIndex, setCurrentCharIndex] = (0, _react.useState)(initialIndex);
  const timeoutId = (0, _react.useRef)(null);
  const delta = backspaceEffect ? -1 : 1;
  const startTypeWriter = (0, _react.useCallback)(ms => {
    timeoutId.current = setTimeout(() => {
      setCurrentCharIndex(currentCharIndex + delta);
      if (vibration && _reactNative.Platform.OS === 'android') {
        _reactNative.Vibration.vibrate(1);
      }
    }, ms);
  }, [currentCharIndex, vibration, delta]);
  const clear = () => {
    if (timeoutId.current) {
      clearTimeout(timeoutId.current);
      timeoutId.current = null;
    }
  };
  (0, _react.useEffect)(() => {
    setCurrentCharIndex(initialIndex);
  }, [content, initialIndex]);
  (0, _react.useEffect)(() => {
    clear();
    const currentChar = content.charAt(currentCharIndex);
    const nextChar = content.charAt(currentCharIndex + delta);
    if (currentChar) {
      onTyped === null || onTyped === void 0 ? void 0 : onTyped(currentChar, currentCharIndex);
    }
    if (!nextChar) {
      onTypingEnd === null || onTypingEnd === void 0 ? void 0 : onTypingEnd();
      return;
    }
    startTypeWriter(Math.round(Math.random() * (maxDelay - minDelay) + minDelay));
  }, [onTyped, startTypeWriter, onTypingEnd, currentCharIndex, content, maxDelay, minDelay, delta]);
  return /*#__PURE__*/_react.default.createElement(_reactNative.Text, props, content.substring(0, backspaceEffect ? currentCharIndex : currentCharIndex + 1));
}
//# sourceMappingURL=index.js.map