Dynamically create and submit form

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执笔经年
执笔经年 2020-11-28 05:09

Is there a way in jQuery to create and submit a form on the fly.

Something like below.


    
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                <span>2020-11-28 05:30</span>
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<p>There were two things wrong with your code. The first one is that you included the <code>$(document).ready();</code> but didn't wrap the jQuery object that's creating the element with it.</p>

<p>The second was the method you were using. jQuery will create any element when the selector (or where you would usually put the selector) is replaced with the element you wish to create. Then you just append it to the body and submit it.</p>

<pre><code>$(document).ready(function(){
    $('<form action="form2.html"></form>').appendTo('body').submit();
});
</code></pre>

<p>Here's the code in action. In this example, it doesn't auto submit, just to prove that it would add the form element.</p>

<p>Here's the code with auto submit. It works out fine. Jsfiddle takes you to a 404 page because "form2.html" doesn't exist on its server, obviously.</p>
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                <span>2020-11-28 05:38</span>
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<p>Its My version without jQuery, simple function can be used on fly</p>

<p>Function:</p>

<pre><code>function post_to_url(path, params, method) {
    method = method || "post";

    var form = document.createElement("form");
    form.setAttribute("method", method);
    form.setAttribute("action", path);

    for(var key in params) {
        if(params.hasOwnProperty(key)) {
            var hiddenField = document.createElement("input");
            hiddenField.setAttribute("type", "hidden");
            hiddenField.setAttribute("name", key);
            hiddenField.setAttribute("value", params[key]);

            form.appendChild(hiddenField);
         }
    }

    document.body.appendChild(form);
    form.submit();
}
</code></pre>

<p>Usage:</p>

<pre><code>post_to_url('fullurlpath', {
    field1:'value1',
    field2:'value2'
}, 'post');
</code></pre>
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                <span>2020-11-28 05:39</span>
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<p>Try with this code -<br>
It is a totally dynamic solution:</p>

<pre><code>    var form = $(document.createElement('form'));
    $(form).attr("action", "reserves.php");
    $(form).attr("method", "POST");

    var input = $("<input>").attr("type", "hidden").attr("name", "mydata").val("bla");
    $(form).append($(input));
    $(form).submit();
</code></pre>
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                <span>2020-11-28 05:41</span>
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<p>Yes, it is possible. One of the solutions is below (jsfiddle as a proof).</p>

<p>HTML:</p>

<pre><code><a id="fire" href="#" title="submit form">Submit form</a>
</code></pre>

<p>(see, above there is no form)</p>

<p>JavaScript:</p>

<pre><code>jQuery('#fire').click(function(event){
    event.preventDefault();
    var newForm = jQuery('<form>', {
        'action': 'http://www.google.com/search',
        'target': '_top'
    }).append(jQuery('<input>', {
        'name': 'q',
        'value': 'stack overflow',
        'type': 'hidden'
    }));
    newForm.submit();
});
</code></pre>

<p>The above example shows you how to create form, how to add inputs and how to submit. Sometimes display of the result is forbidden by <code>X-Frame-Options</code>, so I have set <code>target</code> to <code>_top</code>, which replaces the main window's content. Alternatively if you set <code>_blank</code>, it can show within new window / tab.</p>
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<form class="layui-form" action="">
               
            <div class="layui-form-item">
    <label class="layui-form-label" style="padding-left:0px;width:60px;">发布评论:</label>
    <div class="layui-input-block" style="margin-left:90px;">
         <input type="text" placeholder="不少于5个字" AUTOCOMPLETE="off" class="comment-input layui-input" name="content" />
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                <span>2020-11-28 05:44</span>
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<p>Josepmra example works well for what i need.
But i had to add the line   </p>

<pre><code> form.appendTo( document.body )
</code></pre>

<p>for it to work.  </p>

<pre><code>var form = $(document.createElement('form'));
$(form).attr("action", "reserves.php");
$(form).attr("method", "POST");

var input = $("<input>")
    .attr("type", "hidden")
    .attr("name", "mydata")
    .val("bla" );


$(form).append($(input));

form.appendTo( document.body )

$(form).submit();
</code></pre>
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<form class="layui-form" action="">
               
            <div class="layui-form-item">
    <label class="layui-form-label" style="padding-left:0px;width:60px;">发布评论:</label>
    <div class="layui-input-block" style="margin-left:90px;">
         <input type="text" placeholder="不少于5个字" AUTOCOMPLETE="off" class="comment-input layui-input" name="content" />
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                <span>2020-11-28 05:49</span>
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<p>Why don't you $.post or $.get directly?</p>

<p><code>GET</code> requests:</p>

<pre><code>$.get(url, data, callback);
</code></pre>

<p><code>POST</code> requests:</p>

<pre><code>$.post(url, data, callback);
</code></pre>

<p>Then you don't need a form, just send the data in your data object.</p>

<pre><code>$.post("form2.html", {myField: "some value"}, function(){
  alert("done!");
});
</code></pre>
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