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EmberJS Writing Helpers


You can add additional usefulness to the layouts and convert the crude qualities from models and segments into legitimate arrangement for the clients. On the off chance that you are utilizing the HTML application on various occasions, at that point you can include a custom assistant from any Handlebars layout. On the off chance that the present setting changes, at that point Ember.js will consequently execute the aide and updates the DOM with the refreshed value.

Syntax

 

send out capacity Helper_Name([values]) { 

/code here 

} 

send out default Ember.Helper.helper(Helper_Name); 

The following table records down the diverse methods for utilizing aide names −

You can pass the named contentions alongside the related value.

S.No. Helper Names & Description
1 Helper Arguments

You can pass more than one contention to the assistant by indicating after the partner name.

2 Named Arguments
3 Escaping HTML Content

It is utilized to get away from the HTML labels while showing the result.

Example

The model given beneath actualize the assistant, which takes more than one information and returns single yield. Make another partner with the accompanying direction −

 

coal create assistant aide name 

In this model, we have made the aide with the name writinghelper. Presently open the writinghelper.js document which is made under app/aides/.

 

import Ember from 'ash'; 

trade work formatHelper([value]) { 

let var1 = Math.floor(value * 100); 

let pennies = esteem % 100; 

let var3 = '$'; 

on the off chance that (cents.toString().length === 1) 

return '${var3}${var1}'; 

} 

trade default Ember.Helper.helper(formatHelper); 

You can utilize the "writinghelper" partner in the layout inside wavy supports. Open the index.hbs document and compose the accompanying code −

 

Esteem is : {{writinghelper 5}} 

{{outlet}}