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Expression evaluation support for Lightning Web Component Markup

Lightning Development

Lightning Web-Components are based on the web standards breakthroughs of the last five years yet it does not allow computed expressions in markup.  To compute the value of expression, we have to use a getter in the JavaScript class, which works but makes a single line of code looks like few functions to get it done. 

Most of the web-components supports expression evaluation in markup(eg Google Polymer) , if Salesforce can support it will allow developers to build apps faster and focus on the logic and not on framework complexity.

<template if:true={index % 5 == 0}><br></template>
Src : https://docs-05-dot-polymer-project.appspot.com/0.5/docs/polymer/expressions.html

https://salesforce.stackexchange.com/questions/244460/expression-functions-within-lightning-web-components

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