www.reboot.js.multiSelect.js Maven / Gradle / Ivy
var nf = typeof nf !== 'undefined' ? nf : {};
nf.multiSelect = (function() {
'use strict';
var getValuesAsAnArray = function(s) {
var valueArray = [];
[].forEach.call(s.selectedOptions, function(option) {
valueArray.push(option.value);
}, false);
return valueArray;
};
var clearSelectedOptions = function(select, muteChangeEvent) {
var changeEvent,
itDidChange = false;
while(select.selectedOptions.length) {
itDidChange = true;
select.selectedOptions[0].selected = false;
}
if (!muteChangeEvent && itDidChange) {
changeEvent = new Event('change');
select.dispatchEvent(changeEvent);
}
};
// returns array of all values from a select node
var toArray = function(select) {
var arrayOfValues = [],
options = select.options;
[].forEach.call(options, function(option) {
arrayOfValues.push(
option.value
);
});
return arrayOfValues;
};
var setSelectedValues = function(select, arrayOfValuesToSelect, muteChangeEvent) {
var changeEvent,
arrayOfValuesWithSelectPending = arrayOfValuesToSelect.slice(),
options = select.options,
arrayOfOptionValues,
i,
l;
arrayOfOptionValues = toArray(select);
clearSelectedOptions(select, true);
for (i = 0, l = arrayOfOptionValues.length;
i < l && arrayOfValuesWithSelectPending.length; //loop until you find all values to select
i++) {
//value matches existing option, marking it as selected
if (arrayOfValuesToSelect.indexOf(arrayOfOptionValues[i]) !== -1) {
options[i].selected = true;
//removing relevant entry from arrayOfValuesWithSelectPending
arrayOfValuesWithSelectPending.splice(
arrayOfValuesWithSelectPending.indexOf(arrayOfOptionValues[i]),
1
);
}
}
if (!muteChangeEvent) {
changeEvent = new Event('change');
select.dispatchEvent(changeEvent);
}
};
return {
getValuesAsAnArray:getValuesAsAnArray,
clearSelectedOptions: clearSelectedOptions,
toArray:toArray,
setSelectedValues:setSelectedValues
};
}());