Prefill dropdown List with template

Thread ID:	Created:	Updated:	Platform:	Replies:
144639	May 15,2019 02:26 PM UTC	May 21,2019 07:18 AM UTC	React - EJ 2	1

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Tags: DropDownList

TOKO FIDELE

Asked On May 15, 2019 02:29 PM UTC

Good evening. I'm currently using the DropDownListComponent component with the ItemTemplate and ValueTemplate templates. however, I change the value of my component when loading the page in the componentDidmount lifecycle via a via a setState. the problem is that the value is not taken into account and when the popup opens the item list is invisible..

By adding the value property in the component and modifying its value I have this momentum. I left your example at

https://ej2.syncfusion.com/react/demos/#/material/drop-down-list/template

Thanks in advance and regards,

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Prince Oliver [Syncfusion]

Replied On May 21, 2019 07:18 AM UTC

Hello Toko,

Thank you for contacting us.

componentWillMount() is executed before the component rendering but whereas componentDidMount() is executed once the component has been rendered. When we change the value of the state, then we will be re-rendering in componenDidMount. It takes some time to reflect in the DOM tree. So, we suggest you use componentWillMount for updating the value property. Kindly refer to the following link for the sample

Sample Link: https://stackblitz.com/edit/react-4bxgf7-wuxxjj?file=index.js

Let us know if you need any further assistance on this.

Regards,

Prince

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Prefill dropdown List with template

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