react-infinite-cursor/build/utils/checkProps.js

A browser-ready efficient scrolling container based on UITableView. Takes a cursor for rendering.

// This module provides a centralized place for
// runtime checking that the props passed to React Infinite
// make the minimum amount of sense.

'use strict';

var React = global.React || require('react');
var _isFinite = require('lodash.isfinite');

module.exports = function (props) {
  var rie = 'Invariant Violation: ';
  if (!(props.containerHeight || props.useWindowAsScrollContainer)) {
    throw new Error(rie + 'Either containerHeight or useWindowAsScrollContainer must be provided.');
  }

  if (!(_isFinite(props.elementHeight) || Array.isArray(props.elementHeight))) {
    throw new Error(rie + 'You must provide either a number or an array of numbers as the elementHeight.');
  }

  if (Array.isArray(props.elementHeight)) {
    if (React.Children.count(props.children) !== props.elementHeight.length) {
      throw new Error(rie + 'There must be as many values provided in the elementHeight prop as there are children.');
    }
  }
};