用javascript添加aria属性

Question

我正在尝试将aria-required =“ true”属性添加到wordpress中忍者表单的某些表单元素中。 我正在使用页眉/页脚脚本注入插件。 但是我似乎无法使我的代码真正起作用。 任何帮助将不胜感激！

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 <script> function codeAddress() { var x = document.getElementsByClassName("nf-element"); var i; for (i = 0; i < x.length; i++) { x[i].addAttribute("aria-required", "true"); } window.onload = codeAddress } </script> 

 <div class="nf-field-element"> <input id="nf-field-17" name="nf-field-17" class="ninja-forms-field nf-element" type="text" value="" placeholder="First Name"> </div> 

Answer 1

尝试替换x[i].addAttribute("aria-required", "true"); 与x[i].setAttribute("aria-required", "true");

Answer 2

您需要使用setAttribute 。 另外window.load应该在codeAddress函数之外

 function codeAddress() { var x = document.getElementsByClassName("nf-element"); var i; for (i = 0; i < x.length; i++) { console.log(x[i]) x[i].setAttribute("aria-required", "true"); } } window.onload = codeAddress 

 <div class="nf-field-element"> <input id="nf-field-17" name="nf-field-17" class="ninja-forms-field nf-element" type="text" value="" placeholder="First Name"> </div>