Forums » jQuery

MAXLENGTH EM TEXTAREA COM JQUERY

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    31 de outubro de 2023 04:05:03 ART
    Certamente! O código jQuery que você forneceu é uma solução elegante para limitar o número de caracteres em um elemento `` como se fosse uma propriedade `maxlength`. A seguir, está uma explicação do código em português: **Explicação do Código:** ```javascript // Seleciona todos os elementos com o atributo 'maxlength' $("textarea[maxlength]").keypress(function(event){ var key = event.which; // Todas as teclas incluindo a tecla 'Enter' (código 13) if(key >= 33 || key == 13) { var maxLength = $(this).attr("maxlength"); // Obtém o valor do atributo 'maxlength' var length = this.value.length; // Obtém o comprimento atual do texto no if(length >= maxLength) { event.preventDefault(); // Impede que mais caracteres sejam inseridos se atingir o limite } } }); ``` **Explicação do Funcionamento:** 1. O código jQuery seleciona todos os elementos `` que possuem o atributo `maxlength`. 2. Quando o usuário pressiona uma tecla (representada pelo código `event.which`), o código verifica se a tecla pressionada é maior ou igual a 33 (que corresponde a todas as teclas no teclado, excluindo algumas teclas especiais) ou se é a tecla 'Enter' (código 13). 3. Se a condição acima for verdadeira, o código obtém o valor do atributo `maxlength` do `` e o comprimento atual do texto dentro dele. 4. Se o comprimento do texto for maior ou igual ao valor de `maxlength`, o evento de digitação é prevenido, impedindo que mais caracteres sejam inseridos. Dessa forma, este código jQuery permite limitar o número de caracteres em `` de forma semelhante à propriedade `maxlength` dos elementos `` do tipo texto.
    • 1 posts
    31 de outubro de 2023 14:31:54 ART

    We create an input text area with a specified maxlength and then limit the characters with jQuery code. When we click the button and display web development services usa the count on the screen, we first set the max limit and then use the keyup() method to reduce the textarea character limit by one.

     

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