Comment obtenir l'élément par valeur d'attribut dans JavaScript
document.querySelectorAll('[data-foo="value"]');
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document.querySelectorAll('[data-foo="value"]');const link = document.querySelector('a');
console.log(link.getAttribute('href'));document.getElementById('id1').getAttribute('attribute');<div id="id_of_the_element" data-attribute_name="foo"></div>
var elem = document.getElementById("id_of_the_element");
var attribute_value = elem.getAttribute("data-attribute_name");
//OR with jquery...
var attribute_value = $('#id_of_the_element').attr('data-attribute_name');
//OR...
var attribute_value = $('#id_of_the_element').data('attribute_name');
<!-- example div in an html DOC -->
<div id="div1">Hi Champ!</div>
// in a console
const div1 = document.getElementById('div1');
//=> <div id="div1">Hi Champ!</div>
const exampleAttr= div1.getAttribute('id');
//=> "div1"
const align = div1.getAttribute('align')
//=> null
<!-- example div in an HTML DOC -->
<div id="div1">Hi Champ!</div>
// in a console
const div1 = document.getElementById('div1');
//=> <div id="div1">Hi Champ!</div>
const exampleAttr= div1.getAttribute('id');
//=> "div1"
const align = div1.getAttribute('align')
//=> null