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What does Lightning locker do to the Dom?
This behavior prevents the anti-pattern of reaching into DOM elements owned by components in another namespace. It’s an anti-pattern for any component to “reach into” another component, regardless of namespace, because it breaks encapsulation. Lightning Locker only prevents cross-namespace access.
What are the Lightning components in Shadow DOM?
This markup contains two Lightning web components: c-todo-app and c-todo-item. The #shadow – root document fragment defines the boundary between the DOM and the shadow tree. Elements below the shadow root are in the shadow tree.
How does access containment work in the Dom?
A component can only traverse the DOM and access elements created by a component in the same namespace. This behavior prevents the anti-pattern of reaching into DOM elements owned by components in another namespace. It’s an anti-pattern for any component to “reach into” another component, regardless of namespace, because it breaks encapsulation.
How to contrast two buttons in Lightning component?
The following example component creates two buttons to contrast an HTML button with , which is a standard Lightning component. Clicking on these buttons updates the text component attribute with the specified values. target.get (“v.label”) refers to the label attribute value on the button.
What is the content security policy for lightning?
Lightning components are currently subject to a Content Security Policy (CSP) with the following directives. See CSP Directives for more information. Default policy that resources may be only loaded from the same domain (lightning.force.com or lightning.com). Scripts may only be loaded from the same domain (no external script loads).
Is it safe to use lightning on the server?
All access control enforcement must occur server-side, because the client is under the control of the attacker. Fortunately you can ensure that your server-side code is safe to use with Lightning components by taking some additional steps when writing your Apex classes. All controller classes must have the with sharing keyword.