Prevent Refresh of Page When Button Inside Form Clicked

prevent refresh of page when button inside form clicked

Let getData() return false. This will fix it.

<form method="POST">
    <button name="data" onclick="return getData()">Click</button>
</form>

How do I make an HTML button not reload the page

there is no need to js or jquery.
to stop page reloading just specify the button type as 'button'.
if you dont specify the button type, browser will set it to 'reset' or 'submit' witch cause to page reload.

 <button type='button'>submit</button>

Can I nest a button element inside an a using HTML5?

No, it isn't valid HTML5 according to the HTML5 Spec Document from W3C:

Content model: Transparent, but there must be no interactive content descendant.
The a element may be wrapped around entire paragraphs, lists, tables, and so forth, even entire sections, so long as there is no interactive content within (e.g. buttons or other links).

In other words, you can nest any elements inside an <a> except the following:

<a>
<audio> (if the controls attribute is present)
<button>
<details>
<embed>
<iframe>
<img> (if the usemap attribute is present)
<input> (if the type attribute is not in the hidden state)
<keygen>
<label>
<menu> (if the type attribute is in the toolbar state)
<object> (if the usemap attribute is present)
<select>
<textarea>
<video> (if the controls attribute is present)

If you are trying to have a button that links to somewhere, wrap that button inside a <form> tag as such:

<form style="display: inline" action="http://example.com/" method="get">
  <button>Visit Website</button>
</form>

However, if your <button> tag is styled using CSS and doesn't look like the system's widget... Do yourself a favor, create a new class for your <a> tag and style it the same way.

How to prevent page from reloading after form submit - JQuery

The <button> element, when placed in a form, will submit the form automatically unless otherwise specified. You can use the following 2 strategies:

Use <button type="button"> to override default submission behavior
Use event.preventDefault() in the onSubmit event to prevent form submission

Solution 1:

Advantage: simple change to markup
Disadvantage: subverts default form behavior, especially when JS is disabled. What if the user wants to hit "enter" to submit?

Insert extra type attribute to your button markup:

<button id="button" type="button" value="send" class="btn btn-primary">Submit</button>

Solution 2:

Advantage: form will work even when JS is disabled, and respects standard form UI/UX such that at least one button is used for submission

Prevent default form submission when button is clicked. Note that this is not the ideal solution because you should be in fact listening to the submit event, not the button click event:

$(document).ready(function () {
  // Listen to click event on the submit button
  $('#button').click(function (e) {

    e.preventDefault();

    var name = $("#name").val();
    var email = $("#email").val();

    $.post("process.php", {
      name: name,
      email: email
    }).complete(function() {
        console.log("Success");
      });
  });
});

Better variant:

In this improvement, we listen to the submit event emitted from the <form> element:

$(document).ready(function () {
  // Listen to submit event on the <form> itself!
  $('#main').submit(function (e) {

    e.preventDefault();

    var name = $("#name").val();
    var email = $("#email").val();

    $.post("process.php", {
      name: name,
      email: email
    }).complete(function() {
        console.log("Success");
      });
  });
});

Even better variant: use `.serialize()` to serialize your form, but remember to add `name` attributes to your input:

The name attribute is required for .serialize() to work, as per jQuery's documentation:

For a form element's value to be included in the serialized string, the element must have a name attribute.

<input type="text" id="name" name="name" class="form-control mb-2 mr-sm-2 mb-sm-0" id="inlineFormInput" placeholder="Jane Doe">
<input type="text" id="email" name="email" class="form-control" id="inlineFormInputGroup" placeholder="janedoe@email.com">

And then in your JS:

$(document).ready(function () {
  // Listen to submit event on the <form> itself!
  $('#main').submit(function (e) {

    // Prevent form submission which refreshes page
    e.preventDefault();

    // Serialize data
    var formData = $(this).serialize();

    // Make AJAX request
    $.post("process.php", formData).complete(function() {
      console.log("Success");
    });
  });
});

The page will strangely refresh when I click the button

You should add type="button" to your <button>.

If you don't specify a type of a <button> in a <form>, it will behave like a submit button by default, which refreshes the page.

Docs:

<type="submit"> The button submits the form data to the server. This is the default if the attribute is not specified, or if the attribute is dynamically changed to an empty or invalid value.

Prevent Refresh of Page When Button Inside Form Clicked