Form gÃ¶nderme: Olay veya metod olarak

Form gÃ¶nderildiÄŸinde submit olayÄ± tetiklenir, genellikle formu sunucuya gÃ¶ndermeden Ã¶nce doÄŸrulamak veya gÃ¶nderimi iptal edip JavaScriptâ€™te iÅŸlemek iÃ§in kullanÄ±lÄ±r.

form.submit() metodu JavaScriptâ€™ten form gÃ¶nderimini baÅŸlatmaya izin verir. Kendi formlarÄ±mÄ±zÄ± dinamik olarak oluÅŸturmak ve sunucuya gÃ¶ndermek iÃ§in kullanabiliriz.

Daha fazla ayrÄ±ntÄ± gÃ¶relim.

Olay olarak submit kullanÄ±mÄ±

Form gÃ¶ndermenin iki ana yolu vardÄ±r:

Birincisi â€“ <input type="submit"> veya <input type="image"> alanlarÄ±na tÄ±klamak.
Ä°kincisi â€“ bir giriÅŸ alanÄ±nda (input) Entera basmak.

Her iki eylem de formda olay gÃ¶nderilmesine yol aÃ§ar. Ä°ÅŸleyici verileri kontrol edebilir ve hata varsa bunlarÄ± gÃ¶sterebilir ve event.preventDefault() Ã¶ÄŸesini Ã§aÄŸÄ±rabilir, bu durumda form sunucuya gÃ¶nderilmez.

AÅŸaÄŸÄ±daki formda:

Metin alanÄ±na gidin ve Enter tuÅŸuna basÄ±n.
TÄ±klayÄ±n <input type="submit">

Her iki eylem de alert gÃ¶sterir ve return false olduÄŸu iÃ§in form hiÃ§bir yere gÃ¶nderilmez.

          <form onsubmit="alert('submit!');return false">
  First: Enter in the input field <input type="text" value="text"><br>
  Second: Click "submit": <input type="submit" value="Submit">
</form>

Bir input alanÄ±nda Enter kullanÄ±larak bir form gÃ¶nderildiÄŸinde, <input type="submit"> Ã¼zerinde bir click olayÄ± tetiklenir.

Bu oldukÃ§a komik Ã§Ã¼nkÃ¼ hiÃ§ tÄ±klama yoktu.

Ã–rnek:

          <form onsubmit="return false">
 <input type="text" size="30" value="Buraya tÄ±kla ve bir ÅŸeyler yaz sonra enter'e bas">
 <input type="submit" value="Submit" onclick="alert('click')">
</form>

Metod olarak submit kullanÄ±mÄ±

Sunucuya manuel olarak bir form gÃ¶ndermek iÃ§in, form.submit() metodunu kullanabiliriz.

Sonra herhangi bir submit olayÄ± oluÅŸturulmaz. ProgramcÄ± form.submit() 'i Ã§aÄŸÄ±rÄ±rsa, komut dosyasÄ±nÄ±n tÃ¼m ilgili iÅŸlemleri zaten yaptÄ±ÄŸÄ± varsayÄ±lÄ±r. Bazen bu, aÅŸaÄŸÄ±daki gibi bir formu manuel olarak oluÅŸturmak ve gÃ¶ndermek iÃ§in kullanÄ±lÄ±r:

let form = document.createElement('form');
form.action = 'https://google.com/search';
form.method = 'GET';

form.innerHTML = '<input name="q" value="test">';

// the form must be in the document to submit it
document.body.append(form);

form.submit();

GÃ¶revler

Modal form

Create a function showPrompt(html, callback) that shows a form with the message html, an input field and buttons OK/CANCEL.

A user should type something into a text field and press Enter or the OK button, then callback(value) is called with the value they entered.
Otherwise if the user presses Esc or CANCEL, then callback(null) is called.

In both cases that ends the input process and removes the form.

Requirements:

The form should be in the center of the window.
The form is modal. In other words, no interaction with the rest of the page is possible until the user closes it.
When the form is shown, the focus should be inside the <input> for the user.
Keys Tab/Shift+Tab should shift the focus between form fields, donâ€™t allow it to leave for other page elements.

Usage example:

          showPrompt("Enter something<br>...smart :)", function(value) {
  alert(value);
});
        

A demo in the iframe:

P.S. The source document has HTML/CSS for the form with fixed positioning, but itâ€™s up to you to make it modal.

GÃ¶revler iÃ§in korunaklÄ± alan aÃ§.

A modal window can be implemented using a half-transparent <div id="cover-div"> that covers the whole window, like this:

          #cover-div {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 9000;
  width: 100%;
  height: 100%;
  background-color: gray;
  opacity: 0.3;
}
        

Because the <div> covers everything, it gets all clicks, not the page below it.

Also we can prevent page scroll by setting body.style.overflowY='hidden'.

The form should be not in the <div>, but next to it, because we donâ€™t want it to have opacity.

Ã‡Ã¶zÃ¼mÃ¼ korunaklÄ± alanda aÃ§.

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