[Backport] Checkout - Fix JS error Cannot read property 'quoteData' of undefined

[ihor-sviziev]

Original Pull Request

#18503

Description

Sometimes after going to checkout page we have infinite loading indicator that caused by JS error
Cannot read property 'quoteData' of undefined.

This issue happened because quote.js file using window.checkoutConfig, that inserted directly into page, but sometimes quote.js component initialization executes first.

magento2/app/code/Magento/Checkout/view/frontend/web/js/model/quote.js

Lines 32 to 36 in f6ca94c

	quoteData = window.checkoutConfig.quoteData,
	basePriceFormat = window.checkoutConfig.basePriceFormat,
	priceFormat = window.checkoutConfig.priceFormat,
	storeCode = window.checkoutConfig.storeCode,
	totalsData = proceedTotalsData(window.checkoutConfig.totalsData),

This change adding waiting when dome ready and window.checkoutConfig is already available

Fixed Issues (if relevant)

N/A

Related issues

1. Magento 2.2.3 TypeErrors Cannot read property 'quoteData' / 'storecode' / 'sectionLoadUrl' of undefined  #14412: Magento 2.2.3 TypeErrors Cannot read property 'quoteData' / 'storecode' / 'sectionLoadUrl' of undefined

Manual testing scenarios

1. Add some product to the cart
2. Go to checkout page
3. See console errors

Note: This issue reproducing quote small amount of times

Contribution checklist

• Pull request has a meaningful description of its purpose
• All commits are accompanied by meaningful commit messages
• All new or changed code is covered with unit/integration tests (if applicable)
• All automated tests passed successfully (all builds on Travis CI are green)

[magento-engcom-team]

Hi @ihor-sviziev. Thank you for your contribution
Here is some useful tips how you can test your changes using Magento test environment.
Add the comment under your pull request to deploy test or vanilla Magento instance:

• @magento-engcom-team give me test instance - deploy test instance based on PR changes
• @magento-engcom-team give me 2.2-develop instance - deploy vanilla Magento instance

For more details, please, review the Magento Contributor Assistant documentation

[ihor-sviziev]

Duplicates #21432

[ghost]

Hi @ihor-sviziev, thank you for your contribution!
Please, complete Contribution Survey, it will take less than a minute.
Your feedback will help us to improve contribution process.