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added support for data attributes if available instead of classes #21

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added support for data attributes if available instead of classes #21

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159 changes: 90 additions & 69 deletions jquery.chained.js
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Original file line number Diff line number Diff line change
Expand Up @@ -18,83 +18,104 @@

$.fn.chained = function(parent_selector, options) {

return this.each(function() {

/* Save this to child because this changes when scope changes. */
var child = this;
var backup = $(child).clone();
return this.each(
function( index, element ) {

/* Save this to child because this changes when scope changes. */
var child = element;
var backup = $(child).clone();

/* Handles maximum two parents now. */
$(parent_selector).each( function( index, element ) {
$(element).bind("change", function() {
updateChildren();
});

/* Force IE to see something selected on first page load, */
/* unless something is already selected */
if (!$("option:selected", element).length) {
$("option", element).first().attr("selected", "selected");
}

/* Handles maximum two parents now. */
$(parent_selector).each(function() {
$(this).bind("change", function() {
/* Force updating the children. */
updateChildren();
});

/* Force IE to see something selected on first page load, */
/* unless something is already selected */
if (!$("option:selected", this).length) {
$("option", this).first().attr("selected", "selected");
}

/* Force updating the children. */
updateChildren();
});

function updateChildren() {
var trigger_change = true;
var currently_selected_value = $("option:selected", child).val();

$(child).html(backup.html());

/* If multiple parents build classname like foo\bar. */
var selected = "";
$(parent_selector).each(function() {
var selectedClass = $("option:selected", this).val();
if (selectedClass) {
if (selected.length > 0) {
if (window.Zepto) {
/* Zepto class regexp dies with classes like foo\bar. */
selected += "\\\\";
} else {
selected += "\\";
} );

function updateChildren() {
var trigger_change = true;
var currently_selected_value = $("option:selected", child).val();

$(child).html(backup.html());

/* If multiple parents build classname like foo\bar. */
var selected = "";
$(parent_selector).each(function() {
var selectedClass = $("option:selected", this).val();
if (selectedClass) {
if (selected.length > 0) {
if (window.Zepto) {
/* Zepto class regexp dies with classes like foo\bar. */
selected += "\\\\";
} else {
selected += "\\";
}
}
selected += selectedClass;
}
selected += selectedClass;
}
});

/* Also check for first parent without subclassing. */
/* TODO: This should be dynamic and check for each parent */
/* without subclassing. */
var first;
if ($.isArray(parent_selector)) {
first = $(parent_selector[0]).first();
} else {
first = $(parent_selector).first();
}
var selected_first = $("option:selected", first).val();

$("option", child).each(function() {
/* Remove unneeded items but save the default value. */
if ($(this).hasClass(selected) && $(this).val() === currently_selected_value) {
$(this).prop("selected", true);
trigger_change = false;
} else if (!$(this).hasClass(selected) && !$(this).hasClass(selected_first) && $(this).val() !== "") {
$(this).remove();
});

/* Also check for first parent without subclassing. */
/* TODO: This should be dynamic and check for each parent */
/* without subclassing. */
var first;
if ($.isArray(parent_selector)) {
first = $(parent_selector[0]).first();
} else {
first = $(parent_selector).first();
}
});
var selected_first = $("option:selected", first).val();

$("option", child).each( function( index, element ) {
var hasprop = false;
var isselfirst = false;
var e = $(element);
if ( e.attr('data-chained') ) {
var d = e.data( 'chained' );
if ( d == selected ) {
hasprop = true;
}
if ( d == selected_first ) {
isselfirst = true;
}
} else {
if ( $(element).hasClass( selected ) ) {
hasprop = true;
}
if ( e.hasClass(selected_first) ) {
isselfirst = true;
}
}
/* Remove unneeded items but save the default value. */
if ( hasprop && e.val() === currently_selected_value) {
e.prop("selected", true);
trigger_change = false;
} else if (!hasprop && !isselfirst && e.val() !== "") {
e.remove();
}
} );

/* If we have only the default value disable select. */
if (1 === $("option", child).size() && $(child).val() === "") {
$(child).attr("disabled", "disabled");
} else {
$(child).removeAttr("disabled");
}
if (trigger_change) {
$(child).trigger("change");
/* If we have only the default value disable select. */
if (1 === $("option", child).size() && $(child).val() === "") {
$(child).attr("disabled", "disabled");
} else {
$(child).removeAttr("disabled");
}
if (trigger_change) {
$(child).trigger("change");
}
}
}
});
);
};

/* Alias for those who like to use more English like syntax. */
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2 changes: 1 addition & 1 deletion jquery.chained.min.js
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