react-sticky-dynamic-header
Version:
React component that makes a header sticky with dynamic content before and after being sticky
299 lines (278 loc) • 13.2 kB
JavaScript
(function (global, factory) {
if (typeof define === "function" && define.amd) {
define(['exports', 'react', 'react-addons-css-transition-group'], factory);
} else if (typeof exports !== "undefined") {
factory(exports, require('react'), require('react-addons-css-transition-group'));
} else {
var mod = {
exports: {}
};
factory(mod.exports, global.react, global.reactAddonsCssTransitionGroup);
global.index = mod.exports;
}
})(this, function (exports, _react, _reactAddonsCssTransitionGroup) {
'use strict';
Object.defineProperty(exports, "__esModule", {
value: true
});
var _react2 = _interopRequireDefault(_react);
var _reactAddonsCssTransitionGroup2 = _interopRequireDefault(_reactAddonsCssTransitionGroup);
function _interopRequireDefault(obj) {
return obj && obj.__esModule ? obj : {
default: obj
};
}
function _classCallCheck(instance, Constructor) {
if (!(instance instanceof Constructor)) {
throw new TypeError("Cannot call a class as a function");
}
}
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;
};
}();
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 elementName = '__react-sticky-dynamic-header__';
var componentOK = true;
var DynamicHeader = function (_React$Component) {
_inherits(DynamicHeader, _React$Component);
function DynamicHeader(props) {
_classCallCheck(this, DynamicHeader);
var _this = _possibleConstructorReturn(this, (DynamicHeader.__proto__ || Object.getPrototypeOf(DynamicHeader)).call(this, props));
if (!_this.props.children || !_this.props.children.length || _this.props.children.length < 2) {
console.log('ERROR [react-sticky-dynamic-header]: 2 components must be passed as children!');
componentOK = false;
} else if (_this.props.children.length > 2) {
console.log('WARNING [react-sticky-dynamic-header]: more than 2 components were passed as children, only the first 2 are used, the rest will be ignored!');
if (!_this.props.children[0].type || !_this.props.children[1].type) {
componentOK = false;
}
} else if (!_this.props.children[0].type || !_this.props.children[1].type) componentOK = false;
_this.state = {
headerType: 'big',
bigElementHeight: 0,
smallElementHeight: 0,
alreadyCalculated: false,
bigIndex: 0,
smallIndex: 1
};
return _this;
}
_createClass(DynamicHeader, [{
key: 'componentDidMount',
value: function componentDidMount() {
var h1 = parseInt(this.refs[elementName + '_1'].children[0].offsetHeight);
var h2 = parseInt(this.refs[elementName + '_2'].children[0].offsetHeight);
this.setState({
bigElementHeight: h1,
smallElementHeight: h2,
alreadyCalculated: true
});
window.addEventListener('scroll', this._calcTranslation.bind(this, h1, h2));
}
}, {
key: 'componentWillUnmount',
value: function componentWillUnmount() {
window.removeEventListener('scroll', this._calcTranslation);
}
}, {
key: '_calcTranslation',
value: function _calcTranslation(h1, h2) {
var _window = window;
var heightDiff = parseInt(h1) - parseInt(h2);
if (heightDiff <= 0 || !this.props.useHeadersDifference) heightDiff = parseInt(h1);
var scrollPos = _window.scrollY;
if (scrollPos > heightDiff) {
this.setState({
headerType: 'small'
});
} else {
this.setState({
headerType: 'big'
});
}
}
}, {
key: 'render',
value: function render() {
var tmpEle;
var returnEle;
if (!componentOK) {
tmpBigComponent = _react2.default.createElement(
'div',
{ style: { height: '50px', backgroundColor: '#666', width: '100%', position: 'relative', top: 0, zIndex: 1039, textAlign: 'center' } },
_react2.default.createElement(
'div',
{ style: { paddingTop: '15px' } },
'ERROR [react-sticky-dynamic-header]: 2 components must be passed as children!'
)
);
tmpSmallComponent = _react2.default.createElement(
'div',
{ style: { height: '50px', backgroundColor: '#ccc', width: '100%', position: 'fixed', top: 0, zIndex: 1039, textAlign: 'center' } },
_react2.default.createElement(
'div',
{ style: { paddingTop: '15px' } },
'ERROR [react-sticky-dynamic-header]: 2 components must be passed as children!'
)
);
tmpEle = _react2.default.createElement(
'div',
null,
_react2.default.createElement(
'div',
{ style: { position: 'absolute', top: '-10000px' }, ref: elementName + '_1' },
tmpBigComponent
),
_react2.default.createElement(
'div',
{ style: { position: 'absolute', top: '-20000px' }, ref: elementName + '_2' },
tmpSmallComponent
)
);
} else {
tmpEle = _react2.default.createElement(
'div',
null,
_react2.default.createElement(
'div',
{ style: { position: 'absolute', top: '-10000px' }, ref: elementName + '_1' },
this.props.children[0]
),
_react2.default.createElement(
'div',
{ style: { position: 'absolute', top: '-20000px' }, ref: elementName + '_2' },
this.props.children[1]
)
);
}
if (this.state.alreadyCalculated) {
tmpEle = '';
}
var styleEle = _react2.default.createElement(
'style',
null,
'\
.' + elementName + '_1' + '-enter {\
opacity: 0.01;\
transition: opacity ' + this.props.effectDuration + 'ms ease-in;\
}\
.' + elementName + '_1' + '-enter.' + elementName + '_1' + '-enter-active {\
opacity: 1;\
}\
.' + elementName + '_1' + '-leave {\
opacity: 1;\
transition: opacity 0.1s ease-in;\
}\
.' + elementName + '_1' + '-leave.' + elementName + '_1' + '-leave-active {\
opacity: 0.01;\
}\
.' + elementName + '_2' + '-enter {\
opacity: 0.01;\
transition: opacity ' + this.props.effectDuration + 'ms ease-in;\
}\
.' + elementName + '_2' + '-enter.' + elementName + '_2' + '-enter-active {\
opacity: 1;\
}\
.' + elementName + '_2' + '-leave {\
opacity: 1;\
transition: opacity 0.1s ease-in;\
}\
.' + elementName + '_2' + '-leave.' + elementName + '_2' + '-leave-active {\
opacity: 0.01;\
}\
'
);
if (this.state.headerType == 'big') {
var bigHeaderComponent = _react2.default.createElement(
'div',
{ key: elementName + '_1', style: { height: '50px', backgroundColor: '#666', width: '100%', position: 'relative', top: 0, zIndex: 1039, textAlign: 'center' } },
_react2.default.createElement(
'div',
{ style: { paddingTop: '15px' } },
'ERROR [react-sticky-dynamic-header]: 2 components must be passed as children!'
)
);
if (componentOK) {
bigHeaderComponent = _react2.default.cloneElement(this.props.children[this.state.bigIndex], { key: elementName + '_1' });
}
returnEle = _react2.default.createElement(
'div',
null,
tmpEle,
styleEle,
_react2.default.createElement(
_reactAddonsCssTransitionGroup2.default,
{ transitionName: elementName + '_1', transitionAppear: false, transitionEnterTimeout: 500, transitionLeaveTimeout: 500, transitionLeave: false, transitionEnter: this.props.hasEffect },
bigHeaderComponent
)
);
} else {
var smallHeaderComponent = _react2.default.createElement(
'div',
{ key: elementName + '_2', style: { height: '50px', backgroundColor: '#ccc', width: '100%', position: 'fixed', top: 0, zIndex: 1039, textAlign: 'center' } },
_react2.default.createElement(
'div',
{ style: { paddingTop: '15px' } },
'ERROR [react-sticky-dynamic-header]: 2 components must be passed as children!'
)
);
if (componentOK) {
smallHeaderComponent = _react2.default.cloneElement(this.props.children[this.state.smallIndex], { key: elementName + '_2' });
}
returnEle = _react2.default.createElement(
'div',
null,
tmpEle,
styleEle,
_react2.default.createElement(
_reactAddonsCssTransitionGroup2.default,
{ transitionName: elementName + '_2', transitionAppear: false, transitionEnterTimeout: 500, transitionLeaveTimeout: 500, transitionLeave: false, transitionEnter: this.props.hasEffect },
smallHeaderComponent
),
_react2.default.createElement('div', { style: { height: this.state.bigElementHeight + 'px', width: '100%', clear: 'both' } })
);
}
return returnEle;
}
}]);
return DynamicHeader;
}(_react2.default.Component);
DynamicHeader.defaultProps = {
hasEffect: true,
effectDuration: 600,
useHeadersDifference: false
};
exports.default = DynamicHeader;
});