office-ui-fabric-react/lib/utilities/hoist.js

Reusable React components for building experiences for Office 365.

"use strict";
var REACT_LIFECYCLE_EXCLUSIONS = [
    'setState',
    'render',
    'componentWillMount',
    'componentDidMount',
    'componentWillReceiveProps',
    'shouldComponentUpdate',
    'componentWillUpdate',
    'componentDidUpdate',
    'componentWillUnmount'
];
/**
 * Allows you to hoist methods, except those in an exclusion set from a source object into a destination object.
 * @param destination The instance of the object to hoist the methods onto.
 * @param source The instance of the object where the methods are hoisted from.
 * @param exclusions (Optional) What methods to exclude from being hoisted.
 * @returns {string[]} An array of names of methods that were hoisted.
 */
function hoistMethods(destination, source, exclusions) {
    if (exclusions === void 0) { exclusions = REACT_LIFECYCLE_EXCLUSIONS; }
    var hoisted = [];
    var _loop_1 = function(methodName) {
        if (typeof source[methodName] === 'function' &&
            destination[methodName] === undefined &&
            (!exclusions || exclusions.indexOf(methodName) === -1)) {
            hoisted.push(methodName);
            /* tslint:disable:no-function-expression */
            destination[methodName] = function () { source[methodName].apply(source, arguments); };
        }
    };
    for (var methodName in source) {
        _loop_1(methodName);
    }
    return hoisted;
}
exports.hoistMethods = hoistMethods;
/**
 * Provides a method for convenience to unhoist hoisted methods.
 * @param {any} source The source object upon which methods were hoisted.
 * @param {string[]} methodNames An array of method names to unhoist.
 */
function unhoistMethods(source, methodNames) {
    methodNames
        .forEach(function (methodName) { return delete source[methodName]; });
}
exports.unhoistMethods = unhoistMethods;

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