react-animated-css-onscroll
Version:
React component to show or hide elements with animations when they are visible to the screen using [Animated.css](https://daneden.github.io/animate.css/)
160 lines (124 loc) • 6.28 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.AnimatedOnScroll = undefined;
var _extends = Object.assign || function (target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i]; for (var key in source) { if (Object.prototype.hasOwnProperty.call(source, key)) { target[key] = source[key]; } } } return target; };
var _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();
var _react = require("react");
var _react2 = _interopRequireDefault(_react);
var _lodash = require("lodash.throttle");
var _lodash2 = _interopRequireDefault(_lodash);
var _browserOrNode = require("browser-or-node");
var _reactAnimatedCss = require("react-animated-css");
var _propTypes = require("prop-types");
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
function _objectWithoutProperties(obj, keys) { var target = {}; for (var i in obj) { if (keys.indexOf(i) >= 0) continue; if (!Object.prototype.hasOwnProperty.call(obj, i)) continue; target[i] = obj[i]; } return target; }
function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
function _possibleConstructorReturn(self, call) { if (!self) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return call && (typeof call === "object" || typeof call === "function") ? call : self; }
function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function, not " + typeof superClass); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; }
var isElementInViewport = function isElementInViewport(el) {
var offset = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : 0;
var rect = el.getBoundingClientRect();
return _browserOrNode.isBrowser ? rect.bottom >= offset && rect.right >= 0 && rect.top <= (window.innerHeight || document.documentElement.clientHeight) - offset && rect.left <= (window.innerWidth || document.documentElement.clientWidth) : false;
};
var onVisibilityChange = function onVisibilityChange(el, offset, callback) {
var old_visible = void 0;
return function () {
var visible = isElementInViewport(el, offset);
if (visible !== old_visible) {
old_visible = visible;
if (typeof callback === 'function') {
callback(visible);
}
}
};
};
var AnimatedOnScroll = exports.AnimatedOnScroll = function (_React$Component) {
_inherits(AnimatedOnScroll, _React$Component);
function AnimatedOnScroll(props) {
_classCallCheck(this, AnimatedOnScroll);
var _this = _possibleConstructorReturn(this, (AnimatedOnScroll.__proto__ || Object.getPrototypeOf(AnimatedOnScroll)).call(this, props));
_this.content = null;
_this.onVisibilityChange = function (isVisibleNext) {
var animationOut = _this.props.animationOut;
var isVisible = _this.state.isVisible;
if (isVisible && !animationOut) {
return;
}
_this.setState({ isVisible: isVisibleNext });
};
_this.state = {
isVisible: false
};
return _this;
}
_createClass(AnimatedOnScroll, [{
key: "componentDidMount",
value: function componentDidMount() {
var _this2 = this;
if (_browserOrNode.isBrowser && this.content) {
var screenOffset = this.props.screenOffset;
this.handler = (0, _lodash2.default)(onVisibilityChange(this.content, screenOffset, this.onVisibilityChange), 200);
['DOMContentLoaded', 'load', 'resize', 'scroll'].forEach(function (e) {
return window.addEventListener(e, _this2.handler, false);
});
this.handler();
}
}
}, {
key: "componentWillUnmount",
value: function componentWillUnmount() {
var _this3 = this;
if (_browserOrNode.isBrowser && this.handler) {
['DOMContentLoaded', 'load', 'resize', 'scroll'].forEach(function (e) {
return window.removeEventListener(e, _this3.handler, false);
});
}
}
}, {
key: "render",
value: function render() {
var _this4 = this;
var _props = this.props,
children = _props.children,
rest = _objectWithoutProperties(_props, ["children"]);
var isVisible = this.state.isVisible;
return _react2.default.createElement(
_reactAnimatedCss.Animated,
_extends({}, rest, { isVisible: isVisible, innerRef: function innerRef(me) {
return _this4.content = me;
},
style: _extends({ opacity: isVisible ? 1 : 0 }, rest.style) }),
children
);
}
}]);
return AnimatedOnScroll;
}(_react2.default.Component);
AnimatedOnScroll.displayName = "AnimatedOnScroll";
AnimatedOnScroll.propTypes = {
animationIn: _propTypes.string,
animationOut: _propTypes.string,
animationInDelay: _propTypes.number,
animationOutDelay: _propTypes.number,
animationInDuration: _propTypes.number,
animationOutDuration: _propTypes.number,
style: _propTypes.object,
innerRef: _propTypes.func,
className: _propTypes.string,
animateOnMount: _propTypes.bool,
screenOffset: _propTypes.number
};
AnimatedOnScroll.defaultProps = {
animationIn: "fadeIn",
animationOut: "",
className: "",
animationInDelay: 0,
animationOutDelay: 0,
animationInDuration: 1000,
animationOutDuration: 1000,
animateOnMount: true,
screenOffset: 50,
style: {}
};