jsx-if-else/lib/index.js

A very lightweight and small react component that will let you write simple if and else statement with JSX syntax.

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 _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; }

import React, { Component } from 'react';
import PropTypes from 'prop-types';

export var If = function (_Component) {
  _inherits(If, _Component);

  function If() {
    _classCallCheck(this, If);

    var _this = _possibleConstructorReturn(this, (If.__proto__ || Object.getPrototypeOf(If)).call(this));

    _this.renderIf = _this.renderIf.bind(_this);
    _this.renderElse = _this.renderElse.bind(_this);
    return _this;
  }

  _createClass(If, [{
    key: 'renderIf',
    value: function renderIf(children) {
      /*
      * If children is not an array there is no upcoming Else
      * so returning right the children away.
      */
      if (!Array.isArray(children)) {
        return children;
      }
      var sliceIndex = children.findIndex(function (child) {
        if (Object.prototype.hasOwnProperty.call(child, 'props')) {
          return child.props.operator === 'Else';
        }
      });
      var result = null;
      if (sliceIndex) {
        result = children.slice(0, sliceIndex);
      } else {
        result = children;
      }

      return result;
    }
  }, {
    key: 'renderElse',
    value: function renderElse(children) {
      /*
      * If the component's children are not an array there is no Else content
      * so returning null
      */
      if (!Array.isArray(children)) {
        return null;
      }
      // Find index to know where to slice
      var sliceIndex = children.findIndex(function (child) {
        if (Object.prototype.hasOwnProperty.call(child, 'props')) {
          return child.props.operator === 'Else';
        }
      });
      if (sliceIndex) {
        // Else were found so slicing
        return children.slice(sliceIndex + 1, children.length);
      } else {
        // Else were not found so returning null because the state ment is false
        return null;
      }
    }
  }, {
    key: 'render',
    value: function render() {
      if (this.props.condition === true) {
        return this.renderIf(this.props.children);
      } else {
        return this.renderElse(this.props.children);
      }
    }
  }]);

  return If;
}(Component);
If.propTypes = { condition: PropTypes.bool.isRequired };

export var Else = function (_React$Component) {
  _inherits(Else, _React$Component);

  function Else() {
    _classCallCheck(this, Else);

    return _possibleConstructorReturn(this, (Else.__proto__ || Object.getPrototypeOf(Else)).apply(this, arguments));
  }

  _createClass(Else, [{
    key: 'render',
    value: function render() {
      return null;
    }
  }]);

  return Else;
}(React.Component);
Else.propTypes = { operator: PropTypes.oneOf(['Else']) };
Else.defaultProps = { operator: 'Else' };