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What is the use of helper JS in lightning bundle?
Helper is server-side Controller. It is usually used for firing server-side actions and processing data or tasks. we can call Helper’s java-script function from a client-side controller or renderer. It is also part of the component bundle.
What is helper in lightning?
Helper functions are local to a component, improve code reuse, and move the heavy lifting of JavaScript logic away from the client-side controller, where possible. A helper function can be called from any JavaScript code in a component’s bundle, such as from a client-side controller or renderer.
Can you call JavaScript from lightning Component Library?
The Lightning Component framework uses Content Security Policy (CSP), which is a W3C standard, to control the source of content that can be loaded on a page. The default CSP policy doesn’t allow API calls from JavaScript code. You change the policy, and the content of the CSP header, by adding CSP Trusted Sites.
How is the UI API used in Salesforce?
UI API is a public Salesforce API that Salesforce uses to build Lightning Experience and Salesforce for iOS and Android. Like its name suggests, UI API is designed to make it easy to build Salesforce UI. UI API gives you data and metadata in a single response. Responses match layout changes made to the org by Salesforce admins.
How is lightning data service used in Salesforce?
Lightning Data Service is built on top of User Interface API. UI API is a public Salesforce API that Salesforce uses to build Lightning Experience and Salesforce for iOS and Android. Like its name suggests, UI API is designed to make it easy to build Salesforce UI. UI API gives you data and metadata in a single response.
Is it possible to call an API from JavaScript?
Call APIs from JavaScript By default, you can’t make WebSocket connections or calls to third-party APIs from JavaScript code. To do so, add a remote site as a CSP Trusted Site. The Lightning Component framework uses Content Security Policy (CSP), which is a W3C standard, to control the source of content that can be loaded on a page.