jQuery - How to get the first character of an input?

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I have an input that I want to create custom validations, I need to take its value and validate the first character of the input, what would be the best way to do this?

javascript jquery
  • 6

    var primeiro = input.value[0];

2 answers

5


Take the input value and use the charAt function with the character position in case 0.

var valor = $('#id_input').val();
alert(valor.charAt(0));

4

Version without jQuery.

Because it’s not necessary jQuery for that.

const input = document.getElementById('input1');
const primeiro = input.value[0];
console.log(primeiro);
<input id="input1" type="text" value="um monte de texto" />

  • 2

    Depends, the issue in this is not even the jQuery, but rather the use of charAt or [...], that is to say in general "is not using jQuery", if one already uses jQuery for other things I see no harm in $(...).val();, then just take the test console.log("foo"[0]);. Do you agree that in none of the answers was in fact jQuery who did something?

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