I'm new to LWC in salesforce and want to hide/show the button based status. I write below code but it is hiding for all statuses. Can you please help me if am wrong.
<template for:each={savedCampaignList} for:item="savedCampaignListvar">
<a name={savedCampaignListvar.Id} >View</a>
|
<a hidden =!IF(savedCampaignListvar.Status === 'Saved')" name={savedCampaignListvar.Id} >Delete</a>
</template>
Expressions are different in LWC than in aura and visualforce
You need to have a getter defined in your controller the template uses for expressions or have a tracked variable you update.
You'll end up making a getter like this
get hideLink() {
return this.savedCampaignListvar.Status === 'Saved';
}
and then in your lwc markup you should have this
<template if:false={hideLink}>
<a name={savedCampaignListvar.Id}>Delete</a>
</template>
Note: the hidden attribute is not a boolean attribute. If the attribute exists regardless of setting it to true/false hides the element. See here
Use this code in your HTML template - remember don't put any attribute in your root 'template' element use another div as a holder for for:each directive. You must use a key directive to assign a unique ID to each item. When a list changes, the framework uses the key to rerender only the item that changed. The key in the template is used for performance optimization and isn’t reflected in the DOM at run time.
<template>
<div for:each={savedCampaignList} for:item="savedCampaignListvar" key={savedCampaignListvar.Id}>
<a name={savedCampaignListvar.Id} >View</a>
|
<a if:true={savedCampaignListvar.shouldShow} name={savedCampaignListvar.Id} >Delete</a>
</div>
</template>
We can use connectedCallback function - it's build in LWC function called when the element is inserted into a document. There we can put some condition and add 'shouldShow'(you can call if whatever you want of course;)) attribute to our Objects inside the array. Based on this attribute we will show delete button or not. Your JS should looks like:
import { LightningElement, track } from 'lwc';
export default class App extends LightningElement {
@track savedCampaignList = [
{Id: "1", status: 'Saved'},
{Id: "2", status: 'Not Saved'}
]
connectedCallback() {
this.savedCampaignList.forEach((el)=> {
el.shouldShow = el.status === 'Saved';
})
}
}
You can use if:true or if:hide. Go through this https://salesforcelightningweb.com/#conditionally-render-html-in-lightning-web-component
