This example demonstrates different ways to create a Button that functions like an HTML reset button (<input type="reset"/>
and <button type="reset"/>
).
A Reset Button can be instantiated three different ways:
<input type="reset"/>
or <button type="reset"/>
element<input type="reset"/>
or <button type="reset"/>
elementA Reset Button can be created using an existing <input type="reset"/>
or <button type="reset"/>
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="resetbutton1" type="reset" name="resetfield1" value="Reset Form"> |
2 | <button id="resetbutton2" type="reset" name="resetfield2">Reset Form</button> |
view plain | print | ? |
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 | // Create a Button using an existing <input> element as a data source |
2 | |
3 | var oResetButton1 = new YAHOO.widget.Button("resetbutton1"); |
4 | |
5 | // Create a Button using an existing <button> element as a data source |
6 | |
7 | var oResetButton2 = new YAHOO.widget.Button("resetbutton2"); |
view plain | print | ? |
The Button's constructor will look for the existing <input type="reset"/>
or <button type="reset"/>
element and, once it is found, it will be swapped out for the newly created element via the DOM's replaceChild
method.
A Reset Button can also be instantiated using pre-defined Button Control HTML: An element with a class of "yui-button" and "yui-reset-button" containing a element with a class of "first-child" containing either a <input type="reset"/>
or <button type="button"/>
element:
1 | <span id="resetbutton3" class="yui-button yui-reset-button"> |
2 | <span class="first-child"> |
3 | <input type="reset" name="resetfield3" value="Reset Form"> |
4 | </span> |
5 | </span> |
6 | <span id="resetbutton4" class="yui-button yui-reset-button"> |
7 | <span class="first-child"> |
8 | <button type="button" name="resetfield4">Reset Form</button> |
9 | </span> |
10 | </span> |
view plain | print | ? |
To instantiate a Reset Button using the Button Control HTML, pass the id of the Button's root element (the element with the classes "yui-button" and "yui-reset-button" applied) as the first argument to constructor and any additional configuration attributes as the second argument via an object literal.
1 | var oResetButton3 = new YAHOO.widget.Button("resetbutton3"); |
2 | |
3 | var oResetButton4 = new YAHOO.widget.Button("resetbutton4", { type: "reset" }); |
view plain | print | ? |
To build a Reset Button without any existing HTML, pass a set of configuration attributes as a single argument to the constructor using an object literal.
1 | var oResetButton5 = new YAHOO.widget.Button({ type: "reset", |
2 | label: "Reset Form", |
3 | id: "resetfield5", |
4 | container: "resetbuttonsfromjavascript" }); |
view plain | print | ? |
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.
INFO1093ms (+1) 3:04:41 PM:Button loggerLink
Initialization completed.
INFO1092ms (+0) 3:04:41 PM:Button loggerLink
Setting attribute "href" using source element's attribute value of "btn_example06.html"
INFO1092ms (+1) 3:04:41 PM:Button loggerLink
Building the button using an existing HTML element as a source element.
INFO1091ms (+0) 3:04:41 PM:Button resetbutton4
Initialization completed.
INFO1091ms (+0) 3:04:41 PM:Button resetbutton4
Setting attribute "name" using source element's attribute value of "resetfield4"
INFO1091ms (+0) 3:04:41 PM:Button resetbutton4
Building the button using an existing HTML element as a source element.
INFO1091ms (+1) 3:04:41 PM:Button resetbutton3
Initialization completed.
INFO1090ms (+0) 3:04:41 PM:Button resetbutton3
Setting attribute "value" using source element's attribute value of "Reset Form"
INFO1090ms (+0) 3:04:41 PM:Button resetbutton3
Setting attribute "name" using source element's attribute value of "resetfield3"
INFO1090ms (+0) 3:04:41 PM:Button resetbutton3
Setting attribute "type" using source element's attribute value of "reset"
INFO1090ms (+0) 3:04:41 PM:Button resetbutton3
Building the button using an existing HTML element as a source element.
INFO1090ms (+1) 3:04:41 PM:Button resetbutton2
Initialization completed.
INFO1089ms (+0) 3:04:41 PM:Button resetbutton2
Source element could not be used as is. Creating a new HTML element for the button.
INFO1089ms (+0) 3:04:41 PM:Button resetbutton2
Setting attribute "name" using source element's attribute value of "resetfield2"
INFO1089ms (+1) 3:04:41 PM:Button resetbutton2
Setting attribute "type" using source element's attribute value of "reset"
INFO1088ms (+0) 3:04:41 PM:Button resetbutton2
Building the button using an existing HTML element as a source element.
INFO1088ms (+9) 3:04:41 PM:Button resetbutton1
Initialization completed.
INFO1079ms (+0) 3:04:41 PM:Button resetbutton1
Source element could not be used as is. Creating a new HTML element for the button.
INFO1079ms (+0) 3:04:41 PM:Button resetbutton1
Setting attribute "value" using source element's attribute value of "Reset Form"
INFO1079ms (+0) 3:04:41 PM:Button resetbutton1
Setting attribute "name" using source element's attribute value of "resetfield1"
INFO1079ms (+1) 3:04:41 PM:Button resetbutton1
Setting attribute "type" using source element's attribute value of "reset"
INFO1078ms (+17) 3:04:41 PM:Button resetbutton1
Building the button using an existing HTML element as a source element.
INFO1061ms (+145) 3:04:41 PM:LogReader instance0
LogReader initialized
INFO916ms (+3) 3:04:41 PM:Button resetfield5
Initialization completed.
INFO913ms (+913) 3:04:41 PM:Button resetfield5
No source HTML element. Building the button using the set of configuration attributes.
INFO0ms (+0) 3:04:40 PM:global
Logger initialized
Note: You are viewing this example in debug mode with logging enabled. This can significantly slow performance.
Copyright © 2008 Yahoo! Inc. All rights reserved.
Privacy Policy - Terms of Service - Copyright Policy - Job Openings