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cuadro de texto onkeyup, obtener valor de span javascript

¿Cómo puedo obtener valor del intervalo usando una identificación dinámica y mostrarlo en una entrada de texto?

Tengo esta identificación de tramo

 <span id="unitCost{{$data->product_id}}">700</span>

 **Onkeyup I want to get the span data.** <input type="number" class="form-control total_cost " id="productId{{$data->product_id}}" onkeyup="calculate({{$data->product_id}})" min="0">

Javascript lo probé

 calculate = function(id) { var qty = document.getElementById('unitCost'+id).value; alert (qty); }
about 4 years ago · Juan Pablo Isaza
1 answers
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0

use innerText en lugar de value

 calculate = function(id) { var qty = document.getElementById('unitCost'+id).innerText; alert (qty); }
about 4 years ago · Juan Pablo Isaza Report
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