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How to use lightning Web Components in flow?
It’s time to jump into water. In this blog post, I would be creating Simple Lightning Web Component (LWC). This LWC Component would be able to get value from flow, pass value to flow, navigate to Next screen and hookup into flow validation engine to restrict next page navigation if there is error in LWC input.
How to create a lightning component in Salesforce?
FlowNavigationPauseEvent — Requests the flow runtime to pause the flow. FlowNavigationFinishEvent — Requests the flow runtime to terminate the flow. This example toDos component includes the lightning__FlowScreen target and sets a property in its toDos.js-meta.xml file.
How are events supported in the Lightning component?
The lightning/flowSupport module provides events that enable a component to control flow navigation and notify the flow of changes in attribute values. The events are supported only in components where the target is lightning__FlowScreen. FlowAttributeChangeEvent — Informs the runtime that a component property has changed.
What does flowattributechangeevent do in Lightning?
FlowAttributeChangeEvent — Informs the runtime that a component property has changed. FlowNavigationBackEvent — Requests navigation to the previous screen. FlowNavigationNextEvent — Requests navigation to the next screen.
How to add a LWC to a flow component?
The guts of this component consist of code written by resident Salesforce evangelist Shane McLaughlin. To get an LWC to appear in Flow’s Screen Builder, you add a ‘lightning_FlowScreen’ target to the component’s meta file:
How do I expose attributes from the LWC?
To expose attributes from the LWC, you first use @api in the LWC’s javascript, as is standard for any property you want to make accessible outside of the component: Then you additionally specify which of these public properties should be made visible in Flow by adding a targetConfig section:
How to get null fields in Lightning app builder?
This is almost pure html, your @wire didn’t return data yet so your this.contact is undefined. And yet the HTML calls the getters so null.fields results in error. Try wrapping the HTML in or in all getters write something like return this.account && this.account.data ? this.account.data.fields.Name.value : null;
How to create a lightning input in HTML?
HTML file contains a lightning-input with value attribute with tracked property named inputValue. Whenever the inputValue property gets changed, the screen gets rerendered to reflect the updated value.
How many files are in a lightning bundle?
It has three files in its bundle. HTML file contains a lightning-input with value attribute with tracked property named inputValue. Whenever the inputValue property gets changed, the screen gets rerendered to reflect the updated value.
When to use disconnected hook in Salesforce Lightning?
Called when the element is removed from a document. This hook flows from parent to child. Use disconnectedCallback() to clean up work done in the connectedCallback(), like purging caches or removing event listeners. You can also use this hook to unsubscribe from a message channel.