This example demonstrates different ways to create a Button that functions like an HTML checkbox (<input type="checkbox"/>
).
A Checkbox Button can be instantiated three different ways:
<input type="checkbox"/>
element<input type="checkbox"/>
elementA Checkbox Button can be created using an existing <input type="checkbox"/>
element as a source element, the attributes of which are captured and used for the creation of a new element that replaces the source element inline.
1 | <input id="checkbutton1" type="checkbox" name="checkboxfield1" value="1" checked> |
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Pass the id of the source element as the first argument to the Button's constructor. Additional configuration attributes for a Button can be set at instantiation time by specifying them in an object literal that is passed as the second argument to the Button's constructor. Note: the value of configuration attributes passed to the Button constructor will trump those of the corresponding HTML attributes of the original source element.
1 | var oCheckButton1 = new YAHOO.widget.Button("checkbutton1", { label:"One" }); |
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A Checkbox Button can also be instantiated using pre-defined Button Control HTML: An element with a class of "yui-button" and "yui-checkbox-button" containing a element with a class of "first-child" containing a <button/>
element:
1 | <span id="checkbutton5" class="yui-button yui-checkbox-button"> |
2 | <span class="first-child"> |
3 | <button type="button" name="checkboxfield2">One</button> |
4 | </span> |
5 | </span> |
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To instantiate a Checkbox Button using the Button Control HTML, pass the id of the Button's root element (the element with the classes "yui-button" and "yui-checkbox-button" applied) as the first argument to constructor and any additional configuration attributes as the second argument via an object literal.
1 | var oCheckButton5 = new YAHOO.widget.Button("checkbutton5", { |
2 | type:"checkbox", |
3 | value:"1", |
4 | checked:true }); |
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To build a Checkbox Button without any existing HTML, pass a set of configuration attributes as a single argument to the constructor using an object literal.
1 | var oCheckButton9 = new YAHOO.widget.Button({ |
2 | type: "checkbox", |
3 | label: "One", |
4 | id: "checkbutton9", |
5 | name: "checkboxfield3", |
6 | value: "1", |
7 | container: "checkboxbuttonsfromjavascript", |
8 | checked: true }); |
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In most cases, it is necessary to specify the button's id, type, label and container (the HTML element that the button should be appended to once created). If an id is not specified for the button, one will be generated using the generateId
method of the Dom utility. Similarly, if the "type" attribute is omitted, the default type of "button" will be applied.
You can load the necessary JavaScript and CSS for this example from Yahoo's servers. Click here to load the YUI Dependency Configurator with all of this example's dependencies preconfigured.
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Button checkbutton8
Initialization completed.
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Button null
Setting attribute "name" using source element's attribute value of "checkboxfield2"
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Button null
Building the button using an existing HTML element as a source element.
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Button checkbutton7
Initialization completed.
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Button null
Setting attribute "name" using source element's attribute value of "checkboxfield2"
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Button null
Building the button using an existing HTML element as a source element.
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Button checkbutton6
Initialization completed.
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Button null
Setting attribute "name" using source element's attribute value of "checkboxfield2"
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Button null
Building the button using an existing HTML element as a source element.
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Button checkbutton5
Initialization completed.
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Button null
Setting attribute "name" using source element's attribute value of "checkboxfield2"
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Button null
Building the button using an existing HTML element as a source element.
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Button checkbutton4
Initialization completed.
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Button null
Source element could not be used as is. Creating a new HTML element for the button.
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Button null
Setting attribute "value" using source element's attribute value of "4"
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Button null
Setting attribute "name" using source element's attribute value of "checkboxfield1"
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Button null
Setting attribute "type" using source element's attribute value of "checkbox"
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Button null
Building the button using an existing HTML element as a source element.
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Button checkbutton3
Initialization completed.
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Button null
Source element could not be used as is. Creating a new HTML element for the button.
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Button null
Setting attribute "value" using source element's attribute value of "3"
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Button null
Setting attribute "name" using source element's attribute value of "checkboxfield1"
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Button null
Setting attribute "type" using source element's attribute value of "checkbox"
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Button null
Building the button using an existing HTML element as a source element.
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Button checkbutton2
Initialization completed.
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Button null
Source element could not be used as is. Creating a new HTML element for the button.
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Button null
Setting attribute "value" using source element's attribute value of "2"
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Button null
Setting attribute "name" using source element's attribute value of "checkboxfield1"
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Button null
Setting attribute "type" using source element's attribute value of "checkbox"
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Button null
Building the button using an existing HTML element as a source element.
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Button checkbutton1
Initialization completed.
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Button null
Source element could not be used as is. Creating a new HTML element for the button.
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Button null
Setting attribute "value" using source element's attribute value of "1"
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Button null
Setting attribute "name" using source element's attribute value of "checkboxfield1"
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Button null
Setting attribute "type" using source element's attribute value of "checkbox"
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Button null
Building the button using an existing HTML element as a source element.
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Button loggerLink
Initialization completed.
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Button null
Setting attribute "href" using source element's attribute value of "btn_example03.html"
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Button null
Building the button using an existing HTML element as a source element.
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LogReader instance0
LogReader initialized
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Button checkbutton12
Initialization completed.
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Button null
No source HTML element. Building the button using the set of configuration attributes.
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Button checkbutton11
Initialization completed.
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Button null
No source HTML element. Building the button using the set of configuration attributes.
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Button checkbutton10
Initialization completed.
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Button null
No source HTML element. Building the button using the set of configuration attributes.
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Button checkbutton9
Initialization completed.
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Button null
No source HTML element. Building the button using the set of configuration attributes.
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global
Logger initialized
Note: You are viewing this example in debug mode with logging enabled. This can significantly slow performance.
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