MY html has multiple divs that share the same class name and they have input elements with unique ids, I want to append a span under all of these inputs with JavaScript without editing the html.
this is the part of html
<form name="form" onsubmit="return validate();" method="get">
<div class="form-group">
<label for="pass">Password</label>
<input type="password" class="form-control" name="pass" id="pass">
</div>
<div class="form-group">
<label for="pass2">Re-Type Password</label>
<input type="password" class="form-control" name="pass2" id="pass2">
</div>
.
.
.
</form>
this my JS to create and append the span
const errorMessage = document.createElement('span');
errorMessage.textContent = "invalid input";
document.querySelector('.form-group').appendChild(errorMessage);
But this only creates one span in the first div
you should get all items has class form-group with querySelectorAll
const arrayElement = document.querySelectorAll('.form-group');
for(let i = 0; i < arrayElement.length; i++)
{
const errorMessage = document.createElement('span');
errorMessage.textContent = "invalid input";
arrayElement[i].appendChild(errorMessage);
}
Use querySelectorAll() and iterate.
querySelectorAll(".form-group").forEach(form => {
const errorMessage = document.createElement('span');
errorMessage.textContent = "invalid input";
form.appendChild(errorMessage);
});
querySelector just gets the first instance. You need to use querySelectorAll. Then put everything inside a loop
let group = document.querySelectorAll('.form-group')
for (let i = 0; i < group.length; i++) {
const errorMessage = document.createElement('span');
errorMessage.textContent = "invalid input";
group[i].appendChild(errorMessage);
}<form name="form" onsubmit="return validate()" method="get">
<div class="form-group">
<label for="pass">Password</label>
<input type="password" class="form-control" name="pass" id="pass">
</div>
<div class="form-group">
<label for="pass2">Re-Type Password</label>
<input type="password" class="form-control" name="pass2" id="pass2">
</div>
</form>