react-cqtoolbox/lib/decorator/pureRender.js

[![Travis][build-badge]][build] [![npm package][npm-badge]][npm] [![Coveralls][coveralls-badge]][coveralls]

"use strict";

Object.defineProperty(exports, "__esModule", {
    value: true
});
exports.shallowEqual = shallowEqual;
function shallowEqual(prev, next) {
    if (prev === next) return true;
    var prevKeys = Object.keys(prev);
    var nextKeys = Object.keys(next);

    if (prevKeys.length !== nextKeys.length) return false;

    return prevKeys.every(function (key) {
        return prev.hasOwnProperty(key) && prev[key] === next[key];
    });
}

function PureRender(Component) {
    Component.prototype.shouldComponentUpdate = function (nextProps, nextState) {
        return PureRender.shouldComponentUpdate(nextProps, nextState, this.props, this.state);
    };

    return Component;
}

PureRender.shouldComponentUpdate = function (nextProps, nextState, preProps, preState) {
    return !shallowEqual(preProps, nextProps) || !shallowEqual(preState, nextState);
};

exports.default = PureRender;