TypeScript utils.onPageLoadAsync方法代码示例

    private async _onPageLoadInitFireAndForgetAsync() {
        await utils.onPageLoadAsync(); // wait for page to load

        // Hack: We need to know the networkId the injectedWeb3 is connected to (if it is defined) in
        // order to properly instantiate the web3Wrapper. Since we must use the async call, we cannot
        // retrieve it from within the web3Wrapper constructor. This is and should remain the only
        // call to a web3 instance outside of web3Wrapper in the entire dapp.
        // In addition, if the user has an injectedWeb3 instance that is disconnected from a backing
        // Ethereum node, this call will throw. We need to handle this case gracefully
        const injectedWeb3 = (window as any).web3;
        let networkIdIfExists: number;
        if (!_.isUndefined(injectedWeb3)) {
            try {
                networkIdIfExists = _.parseInt(await promisify<string>(injectedWeb3.version.getNetwork)());
            } catch (err) {
                // Ignore error and proceed with networkId undefined
            }
        }

        const provider = await Blockchain._getProviderAsync(injectedWeb3, networkIdIfExists);
        this.networkId = !_.isUndefined(networkIdIfExists)
            ? networkIdIfExists
            : configs.IS_MAINNET_ENABLED ? constants.NETWORK_ID_MAINNET : constants.NETWORK_ID_KOVAN;
        this._dispatcher.updateNetworkId(this.networkId);
        const zeroExConfigs = {
            networkId: this.networkId,
        };
        this._zeroEx = new ZeroEx(provider, zeroExConfigs);
        this._updateProviderName(injectedWeb3);
        const shouldPollUserAddress = true;
        this._web3Wrapper = new Web3Wrapper(provider);
        this._blockchainWatcher = new BlockchainWatcher(
            this._dispatcher,
            this._web3Wrapper,
            this.networkId,
            shouldPollUserAddress,
        );

        const userAddresses = await this._web3Wrapper.getAvailableAddressesAsync();
        this._userAddressIfExists = userAddresses[0];
        this._dispatcher.updateUserAddress(this._userAddressIfExists);
        await this.fetchTokenInformationAsync();
        this._blockchainWatcher.startEmittingNetworkConnectionAndUserBalanceState();
        await this._rehydrateStoreWithContractEvents();
    }

import * as _ from 'lodash';
import * as ReactGA from 'react-ga';
import { configs } from 'ts/utils/configs';
import { utils } from 'ts/utils/utils';
import * as Web3 from 'web3';

export const analytics = {
    init() {
        ReactGA.initialize(configs.GOOGLE_ANALYTICS_ID);
    },
    logEvent(category: string, action: string, label: string, value?: any) {
        ReactGA.event({
            category,
            action,
            label,
            value,
        });
    },
    async logProviderAsync(web3IfExists: Web3) {
        await utils.onPageLoadAsync();
        const providerType = !_.isUndefined(web3IfExists)
            ? utils.getProviderType(web3IfExists.currentProvider)
            : 'NONE';
        ReactGA.ga('set', 'dimension1', providerType);
    },
};