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Cambiar el estilo de un elemento en una matriz

¿Cómo puedo cambiar el estilo de un elemento en una matriz? He ocultado la clase "testimonio" en CSS antes, ahora quiero mostrar un solo elemento de esa clase. Estoy buscando algo como esto:

 let test= document.getElementsByClassName("test"); test[0].style.visibility = "block";

about 4 years ago · Juan Pablo Isaza
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Tiene razón, solo debe usar la propiedad css correcta (tal vez sea display:block , en javascript HTMLElementNodeList[<indexOfElement>].style.display="block" )

about 4 years ago · Juan Pablo Isaza Report
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