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Form Validation
Input:text
HTML Insertion
.wrap() .append() .replaceWith() .prepend() .after() .before() .html()
HTML Form
Form values to json jquery .serializeArray() .serialize()
Jquery Exercises
Filter on Loaded data
Event handler methods
.on()
.before() in HTML Insertion of JQuery
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How to insert html on before selected tag 
.before(html_tag) - to insert html tag before to the selected element.

Example
    $("#good_div").before('<div id="before_tag_div" style="font-size: 40px;">Before element</div>');
Working Style 
Source
<div id="best_div">
      Best Div
</div>
<div id="good_div">
      Good or Bad
</div>

Output
<div id="best_div">
      Best Div
</div>
<div id="before_tag_div" style="font-size: 40px;">
        Before element
</div>
<div id="good_div">
      Good or Bad
</div>
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