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Acceso al contenido específico de un código interno de un script

Por favor, ¿alguien puede decirme cómo puedo acceder al valor de "41" en este script interno de un sitio web? Acabo de probar esto, pero no funciona

Probé con:

 var elem = document.getElementById("back-in-stock-helper");

Solo necesito el número 41, y el código de ejemplo al que necesito acceder es este

 <script id="back-in-stock-helper"> var _BISConfig = _BISConfig || {}; _BISConfig.product.variants[0]['inventory_quantity'] = 41; </script>

¡Gracias!

Resuelto:

var elem = document.getElementById("back-in-stock-helper");

var elem2 = elem.textContent;

var ult_pos = elem2.lastIndexOf('=');

var stock = elem2.substring(ult_pos);

about 4 years ago · Juan Pablo Isaza
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