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dynamic-forms

Javascript Dynamic Forms

Dynamic forms is a javascript library meant to help make normal HTML forms more dynamic.

Setup

Notes:

• The jQuery library is required
• The compiled versions for this library are under the directory dist.

<script src="/path/to/jquery.min.js"></script>
<script src="/path/to/dynamic_forms.js"></script>

Example

See the playground for a working example.

...
<form>
    Single Input:
    <br/>
 
    <div data-dynamic-form>
        <div data-dynamic-form-template="single">
            <label>
                <input type="text" name="single[ID]" data-dynamic-form-input-id-template="ID"/>
                <button type="button" data-dynamic-form-add>Add</button>
                <button type="button" data-dynamic-form-remove>Remove</button>
            </label>
        </div>
    </div>
 
    <br/>
    <br/>
    Multi Input:
    <br/>
    <div data-dynamic-form>
        <div data-dynamic-form-template="multi">
            <label>
                <input type="text" name="multi[ID][foo]" data-dynamic-form-input-id-template="ID"/>
                <input type="text" name="multi[ID][bar]" data-dynamic-form-input-id-template="ID"/>
                <button type="button" data-dynamic-form-add>Add</button>
                <button type="button" data-dynamic-form-remove>Remove</button>
            </label>
        </div>
    </div>
 
    <br/>
    <br/>
    Single Input with Fill:
    <br/>
 
    <div data-dynamic-form>
        <div data-dynamic-form-template="single_fill" data-dynamic-form-fill='{ "0": "foo", "1": "bar", "344": "foo-bar" }'>
            <label>
                <input type="text" name="single_fill[ID]" data-dynamic-form-input-id-template="ID"/>
                <button type="button" data-dynamic-form-add>Add</button>
                <button type="button" data-dynamic-form-remove>Remove</button>
            </label>
        </div>
    </div>
 
    <br/>
    <br/>
    Multi Input with Fill:
    <br/>
 
    <div data-dynamic-form>
        <div data-dynamic-form-template="multi_fill"
             data-dynamic-form-fill='{ "0": {"foo": "foo 0", "bar": "bar 0"}, "1": {"foo": "foo 1", "bar": "bar 1"} }'>
            <label>
                <input type="text" name="multi_fill[ID][foo]" data-dynamic-form-input-id-template="ID"
                       data-dynamic-form-input-name="foo"/>
                <input type="text" name="multi_fill[ID][bar]" data-dynamic-form-input-id-template="ID"
                       data-dynamic-form-input-name="bar"/>
                <button type="button" data-dynamic-form-add>Add</button>
                <button type="button" data-dynamic-form-remove>Remove</button>
            </label>
        </div>
    </div>
</form>
<script>
    $(document).ready(function () {
        var dynamicForms = new DynamicForms();
        dynamicForms.automaticallySetupForm();
    });
</script> 
...

Usage Notes:

• data-dynamic-form sets up a form section to be made dynamic. This is the container where new rows will be placed.
• data-dynamic-form-template defines the div as a template, and the value given is the id for the template. This div will be removed from the form to prevent it from being used as input.
• data-dynamic-form-add defines a button that is used to create a new row.
• data-dynamic-form-remove defines a button that is used to remove a row.
• data-dynamic-form-input-id-template is used for naming of dynamically added rows. The value will be replaced with the id.
• data-dynamic-form-input-name is used by the fill to fill the input field.

Input Naming

• If you supply data with data-dynamic-form-fill, the form will automatically create new rows with the data.
• Any supplied rows with data-dynamic-form-fill will be added to the form with their id.
• Any new rows will be given an id by a base 26 alphabet system: a,b,c,...aa,ab,ac....

Adding an observer

If you ever want to capture events such as creating/removing a new row, you will need to create an observer.

Here is an example:

...
<script>
    function Observer() {
        this.elementsCreated = 0;
        this.elementsRemoved = 0;
    }
 
    Observer.prototype.rowWasCreated = function (element) {
        this.elementsCreated++;
    };
 
    Observer.prototype.rowWasRemoved = function (element) {
        this.elementsRemoved++;
    };
    
    $(document).ready(function () {
        var dynamicForms = new DynamicForms();
        var observer = new Observer();
        dynamicForms.automaticallySetupForm();
        dynamicForms.addObserver(observer);
    });
</script> 
...

• Whenever a row is created, the function rowWasCreated will be called.
• Whenever a row is removed, the function rowWasRemoved will be called.